Consulta: subjectFacets:"Trace metals"
Registros recuperados: 42
Data/hora: 12/06/2024 13:58:39

Распределение тяжелых металлов в поверхностном слое донных осадков Севастопольской бухты (Черное море)
Provedor de dados: IBSS Repository
Autores: Овсяный, Е. И.; Романов, А. С.; Игнатьева, О. Г.
Определены концентрации некоторых тяжелых металлов (меди, цинка и марганца) в донных отложениях Севастопольской бухты. Степень загрязнения донных осадков тяжелыми металлами  значительно отличается в различных зонах бухты и зависит от близости к источникам загрязнения и физических свойств осадков.
Tipo: Journal Contribution
Palavras-chave: Тяжелые металлы; Донные осадки; Севастопольская бухта; Черное море; Trace metals; Sediments pollution; Sevastopol bay; The Black Sea Trace metals.
Ano: 2003
URL: http://repository.ibss.org.ua/dspace/handle/99011/46

Influence des apports fluviatiles en Baie de Seine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Avoine, J; Crevel, L.
Hydrological study of Seine Bay displays two areas differentiated by salinity distribution. One has marine characteristics and the other is under fluvial influence. In this paper the authors give the main results of exchanges between the environments, obtained by the study of water dilution, solid particles dispersion, and their contribution to sedimentation.
Tipo: Text
Palavras-chave: Estuarine front; River plumes; Trace metals; Salinity; Residual flow; Seasonal variations; Environmental effects; Sediment dynamics; Estuarine sedimentation; River discharge.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1275.pdf

Utilisation de Posidonia oceanica (L.) Delile comme bio-indicateur de la contamination métallique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lafabrie, Céline.
The coastal zone of the continental shelf contains a high ecological richness. However, this zone is very fragile towards xenobiotics ; the pollution of this environment can be damaging to the structure of the biocenoses and to the productivity of the ecosystems. Metals, contrarily to numerous contaminants, are normal constituents of the environment at a trace level, but are all toxic above a certain threshold. At the end of the 1970s, several researchers proposed the use of organisms to evaluate the quality of the marine environment ; it is in this context that the bio-indicator concept arises. The seagrass Posidonia oceanica (L.) Delile, endemic of the Mediterranean Sea, has been the subject of several works proposing to use this species to determine the...
Tipo: Text
Palavras-chave: Mediterranean Sea; Human impacts; Metal contamination; Trace metals; Bio indicator; Posidonia oceanica; Méditerranée; Impacts anthropiques; Contamination métallique; Métaux traces; Bio indicateur; Posidonia oceanica.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-3082.pdf

Intercomparison of dissolved iron isotope profiles from re-occupation of three GEOTRACES stations in the Atlantic Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Conway, T. M.; John, S. G.; Lacan, F.
Intercomparison of trace metal data is a key aspect of the International GEOTRACES program, allowing data from multiple laboratories and countries to be combined to produce high-resolution datasets for the oceans. The use of crossover stations by the GEOTRACES program provides the opportunity both for comparison of analytical techniques and assessment of temporal variability in the cycling of trace metals such as iron (Fe). Here, we present the first comparison of dissolved Fe stable isotope ratio (δ56Fe; relative to IRMM-014) profiles in the oceans, from re-occupations of three locations in the Atlantic Ocean; (1) the Bermuda Atlantic Time Series Station (31.75°N 64.17°W) during the U.S. GEOTRACES IC1 cruise (June 2008) and the U.S. GEOTRACES GA03 cruise...
Tipo: Text
Palavras-chave: Trace metals; GEOTRACES; Biogeochemistry; Intercomparison.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00332/44330/43932.pdf

Factors regulating the Great Calcite Belt in the Southern Ocean and its biogeochemical significance
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Balch, William M.; Bates, Nicholas R.; Lam, Phoebe J.; Twining, Benjamin S.; Rosengard, Sarah Z.; Bowler, Bruce C.; Drapeau, Dave T.; Garley, Rebecca; Lubelczyk, Laura C.; Mitchell, Catherine; Rauschenberg, Sara.
The Great Calcite Belt (GCB) is a region of elevated surface reflectance in the Southern Ocean (SO) covering similar to 16% of the global ocean and is thought to result from elevated, seasonal concentrations of coccolithophores. Here we describe field observations and experiments from two cruises that crossed the GCB in the Atlantic and Indian sectors of the SO. We confirm the presence of coccolithophores, their coccoliths, and associated optical scattering, located primarily in the region of the subtropical, Agulhas, and Subantarctic frontal regions. Coccolithophore-rich regions were typically associated with high-velocity frontal regions with higher seawater partial pressures of CO2 (pCO(2)) than the atmosphere, sufficient to reverse the direction of gas...
Tipo: Text
Palavras-chave: Coccolithophores; Trace metals; Carbonate chemistry; Southern Ocean; Subantarctic Front; Subtropical Front.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00383/49412/49883.pdf

Biological availability of sediment-bound trace metals.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Luoma, S.
It has been established that direct uptake of (at least some) trace metals from sediments contributes to metal concentrations in benthic organisms. Important controls on metal uptake from sediment are the concentration of the exposure, the partitioning of the metals among components of the sediment, and the redox potential of the sediment. Important problems in ecology, physiology, geochemistry and biogeochemistry remain unresolved, however, and a concentrated interdisciplinary research effort will be necessary before a complete understanding of the fate and impact of sediment-bound metals will be possible.
Tipo: Text
Palavras-chave: Bioaccumulation; Benthos; Food webs; Biogeochemical cycle; Sediments; Availability; Trace metals.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1302.pdf

Marine water quality assessment using transplanted oyster larvae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Quiniou, Francoise; Damiens, G; Gnassia Barelli, M; Geffard, A; Mouneyrac, C; Budzinski, H; Romeo, Michèle.
Active bio-monitoring in terms of biornarkers was attempted using Crassostrea gigas larvae produced in the laboratory and transplanted using special containers to two sites at the entrance (A) and inner part (P) of the harbour of Arcachon (French Atlantic Coast). The larvae were kept in the medium for 48 h. Their physiological status and their biomarker levels : acetylcholinesterase AChE, catalase CAT and glutathione S-transferase GST activities were determined together with metallothionein Wand Thiobarbituric Acid Reactive Substances TBARS concentrations. Copper and PAH (polycyclic aromatic hydrocarbon) concentrations were determined in the exposed larvae and in the sediments collected under the containers. Cadmium, lead and zinc could be also analyzed in...
Tipo: Text
Palavras-chave: PAHs; Trace metals; Biomarkers; Active bio monitoring; Crassostrea gigas larvae.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2269.pdf

Expanding Tara Oceans Protocols for Underway, Ecosystemic Sampling of the Ocean-Atmosphere Interface During Tara Pacific Expedition (2016-2018)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gorsky, Gabriel; Bourdin, Guillaume; Lombard, Fabien; Pedrotti, Maria Luiza; Audrain, Samuel; Bin, Nicolas; Boss, Emmanuel; Bowler, Chris; Cassar, Nicolas; Caudan, Loic; Chabot, Genevieve; Cohen, Natalie R.; Cron, Daniel; De Vargas, Colomban; Dolan, John R.; Douville, Eric; Elineau, Amanda; Flores, J. Michel; Ghiglione, Jean Francois; Haentjens, Nils; Hertau, Martin; John, Seth G.; Kelly, Rachel L.; Koren, Ilan; Lin, Yajuan; Marie, Dominique; Moulin, Clementine; Moucherie, Yohann; Pesant, Stephane; Picheral, Marc; Poulain, Julie; Pujo-pay, Mireille; Reverdin, Gilles; Romac, Sarah; Sullivan, Mathew B.; Trainic, Miri; Tressol, Marc; Trouble, Romain; Vardi, Assaf; Voolstra, Christian R.; Wincker, Patrick; Agostini, Sylvain; Banaigs, Bernard; Boissin, Emilie; Forcioli, Didier; Furla, Paola; Galand, Pierre E.; Gilson, Eric; Reynaud, Stephanie; Sunagawa, Shinichi; Thomas, Olivier P.; Thurber, Rebecca Lisette Vega; Zoccola, Didier; Planes, Serge; Allemand, Denis; Karsenti, Eric; Planes, S.; Banaig, B.; Boissin, E.; Iwankow, G.; Allemand, D.; Zoccola, D.; Reynaud, S.; Beraud, E.; Djerbi, N.; Forcioli, D.; Furla, P.; Gilson, E.; Mcmind, R.; Ottaviani, A.; Rottinger, E.; Rouan, A.; Zamoum, T.; Flume, B. C. C.; Pogoreutz, C.; Voolstra, C. R.; Rothig, T.; Ziegler, M.; Paoli, L.; Ruscheweyh, H-j; Salazar, G.; Sunagawa, S.; Flores, J. M.; Koren, I; Trainic, M.; Lang-yona, N.; Vardi, A.; Conan, P.; Ghiglione, J-f; Pujo-pay, M.; Galand, P. E.; Hochart, C.; Audrain, S.; Bourgois, E.; Hertau, M.; Lancelot, J.; Monmarche, D.; Moulin, C.; Moucherie, Y.; Trouble, R.; Boss, E.; Bourdin, G.; Haentjens, N.; Karp-boss, L.; Douville, Eric; Agostini, S.; Mitsuhashi, G.; Kitano, Y.; Da Silva, O.; Dolan, J. R.; Gorsky, G.; Lemee, R.; Lombard, F.; Pedrotti, M-l; Cronin, D.; Sullivan, M.; Armstrong, E.; Aury, J-m; Barbe, V; Belser, C.; Carradec, Q.; Labadie, K.; Le-hoang, J.; Noel, B.; Poulain, J.; Wincker, P.; Klinges, G.; Vega-thunder, R.; Bonnival, E.; De Vargas, C.; Henry, N.; Marie, D.; Romac, S.; Pesant, S.; Miguel-gorda, M.; Thomas, O. P.; Bowler, C.; Friedrich, R.; Cassar, N.; Lin, Y.; John, S. G.; Kelly, R. L.; Cohen, N. R.; Reverdin, G.; Filee, J.
Interactions between the ocean and the atmosphere occur at the air-sea interface through the transfer of momentum, heat, gases and particulate matter, and through the impact of the upper-ocean biology on the composition and radiative properties of this boundary layer. The Tara Pacific expedition, launched in May 2016 aboard the schooner Tara, was a 29-month exploration with the dual goals to study the ecology of reef ecosystems along ecological gradients in the Pacific Ocean and to assess inter-island and open ocean surface plankton and neuston community structures. In addition, key atmospheric properties were measured to study links between the two boundary layer properties. A major challenge for the open ocean sampling was the lack of ship-time available...
Tipo: Text
Palavras-chave: Neuston/plankton genomics/taxonomy/imaging; Aerosols; NCP; IOP; Trace metals; Microplastic.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00599/71083/69390.pdf

Modélisation de la bioaccumulation de métaux traces (Hg, Cd, Pb, Cu et Zn) chez la moule, Mytilus galloprovincialis, en milieu méditerranéen
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Casas, Stellio.
Monitoring coastal contamination of trace metals using bivalve molluscs as quantitative bioindicators is widely used in many international monitoring programs. The bioaccumulation of metal within an organism results from the interaction between physiological (growth, loss of weight, absorption, accumulation), chemical (metal concentration, speciation, bioavailability) and environmental factors (temperature, SPM, chlorophyll). By utilizing the parameters above in this study, it appears that modeling metal dynamics in marine mussels is a reliable tool. The model allows understanding the bioaccumulation process which results from the interactions between biological, chemical and environmental factors. One of the objective of this study was to couple a...
Tipo: Text
Palavras-chave: Biomonitoring; Dynamic Energy Budget; Model; Trace metals; Bioaccumulation; Mytilus galloprovincialis; Mussel; Bioindicator; Surveillance; Budget énergétique dynamique; Modèle; Métaux traces; Bioaccumulation; Mytilus galloprovincialis; Moule; Bioindicateur.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-356.pdf

Effect of local hydroclimate on phytoplankton groups in the Charente estuary
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guesdon, Stephane; Stachowski-haberkorn, Sabine; Lambert, Christophe; Beker, Beatriz; Brach-papa, Christophe; Auger, Dominique; Bechemin, Christian.
This study aimed to describe seasonal variations of phytoplankton abundances in relation to the physical and chemical (nutrients and metals) environment under the influence of freshwater input in the Charente river estuary (Marennes-Oléron bay, France) over three years, from 2011 to 2014. Phytoplankton abundances were determined using microscopy and flow cytometry. Considering high frequency temperature and salinity data, breakpoints in each series led to the identification of two local hydroclimatic periods: the first (2011 and early 2012) being warmer and higher in salinity than the second (from spring 2012 to the beginning of 2014). A multiblock PLS analysis highlighted the significant contribution of the physical environment (temperature, salinity and...
Tipo: Text
Palavras-chave: Hydroclimate; Estuary; Phytoplankton; Size composition; Nutrients; Trace metals.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00349/46005/45674.pdf

Trace metal concentrations in the North-western Mediterranean atmospheric aerosol between 1986 and 2008: Seasonal patterns and decadal trends
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heimbuerger, Lars-eric; Migon, Christophe; Dufour, Aurelie; Chiffoleau, Jean-francois; Cossa, Daniel.
Climatic and anthropogenic changes are able to engender modifications in the aerosol composition at different geographical and temporal scales The present study addresses this question for the trace metal concentrations (TM = Al, Fe, Mn, Co, Ni, Cu, Pb, Cd and Zn) of aerosol from the North-western Mediterranean coast of France (Cap Ferrat, nearby Nice) between 1986 and 2008. From seasonal variations (2006-08) and decadal trends (1986-2008) of TM concentrations. three groups of elements can be distinguished They consist of different aerosol sources: crustal-derived elements (Al, Fe. Mn and Co), trace metals of anthropogenic origin (Pb, Cd and Zn) and a third, intermediate, group of trace metals that presented both anthropogenic and natural/crustal...
Tipo: Text
Palavras-chave: Trace metals; Aerosols; Anthropic impact; Mediterranean; Anti-pollution policy.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00006/11688/8503.pdf

Developing Autonomous Observing Systems for Micronutrient Trace Metals
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grand, Maxime M.; Laes, Agathe; Fietz, Susanne; Resing, Joseph A.; Obata, Hajime; Luther, George W.; Tagliabue, Alessandro; Achterberg, Eric P.; Middag, Rob; Tovar-sánchez, Antonio; Bowie, Andrew R.
Trace metal micronutrients are integral to the functioning of marine ecosystems and the export of particulate carbon to the deep ocean. Although much progress has been made in mapping the distributions of metal micronutrients throughout the ocean over the last 30 years, there remain information gaps, most notable during seasonal transitions and in remote regions. The next challenge is to develop in situ sensing technologies necessary to capture the spatial and temporal variabilities of micronutrients characterized with short residence times, highly variable source terms, and sub-nanomolar concentrations in open ocean settings. Such an effort will allow investigation of the biogeochemical processes at the necessary resolution to constrain fluxes, residence...
Tipo: Text
Palavras-chave: Trace metals; Micronutrients; In situ chemical analyzers; In situ sensors; GEOTRACES; OceanObs'19; Ocean observing time series.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00482/59337/62116.pdf

Characterization and sources of colored dissolved organic matter in a coral reef ecosystem subject to ultramafic erosion pressure (New Caledonia, Southwest Pacific)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martias, Chloe; Tedetti, Marc; Lantoine, Francois; Jamet, Leocadie; Dupouy, Cecile.
The eastern lagoon of New Caledonia (NC, Southwest Pacific), listed as a UNESCO World Heritage site, hosts the world's second longest double-barrier coral reef. This lagoon receives river inputs, oceanic water arrivals, and erosion pressure from ultramafic rocks, enriched in nickel (Ni) and cobalt (Co). The aim of this study was to characterize colored dissolved organic matter (CDOM), as well as to determine its main sources and its possible relationships (through the use of Pearson correlation coefficients, r) with biogeochemical parameters, plankton communities and trace metals in the NC eastern lagoon. Water samples were collected in March 2016 along a series of river/lagoon/open-ocean transects. The absorption coefficient at 350 nm (a(350)) revealed...
Tipo: Text
Palavras-chave: CDOM; Fluorescence; Trace metals; Southwest Pacific; Coral reef lagoon; Rivers.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00481/59307/62061.pdf

Etude du comportement des éléments traces en milieu estuarien : approche expérimentale et modélisation : Application à l'étude de la spéciation de Cd, Co et Cs dans les estuaires majeurs français (Seine, Loire, Gironde, Rhône)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dange, Catherine.
Most of trace elements have a non conservative behavior in estuarine environments. It is the case of cadmium, cobalt and caesium for which the fate in estuarine and coastal zones is largely controlled by their distribution between water and suspended particles, which generally have high residence times or can be definitely deposited in these areas. Metallic contaminants and radionuclides can be present under various species : dissolved (mineral and organic complexes), colloidal and particulate forms (adsorbed, precipitated) or integrated by various mechanisms in the organisms. Such distributions are the result of processes (physical, chemical, biological) which are controlled by many factors (ionic strengh, pH, Eh, major cations concentration, nature and...
Tipo: Text
Palavras-chave: Modeling; French estuaries; Caesium; Cobalt; Cadmium; Radionuclides; Trace metals; Speciation; Modélisation; Estuaires français; Cesium; Cobalt; Cadmium; Radionucléides; Métal trace; Speciation.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/these-183.pdf

Interet de la microscopie analytique pour l''etude d''impact de metaux traces et de terres rares sur le milieu vivant. Application a l''etude d''une zone polluee: La Baie de Seine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chassard Bouchaud, C; Noel, Philippe; Hubert, M; Hallegot, P.
To study bioaccumulation and metabolism of trace metals (silver-lead-copper-iron-uranium) and rare earths (lanthanium) in estuarine organisms (Crangon crangon, Mytilus edulis, Abra Alba, Cutellus pellucidus, Owenia furiformis ) the authors use in situ microanalysis associated with electronic or photonic microscopy.
Tipo: Text
Palavras-chave: Rare earths; Trace metals; Bioaccumulation; Pollution effects; Microscopy.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1305.pdf

Organic and inorganic human-induced contamination of Posidonia oceanica meadows
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pergent, Gerard; Labbe, Celine; Lafabrie, Celine; Kantin, Roger; Pergent-martini, Christine.
In coastal environments, plants are used for phytoremediation of contamination. Organic and inorganic contaminants may be due to natural and/or anthropogenic sources. The aim of this study is to compare inorganic (trace metal) and organic (PAH) contamination in Posidonia oceanica and to analyse the relationship between these types of pollutants indeed very few studies have been interested in their correlations and common sources. P. oceanica leaves were collected in two sites exhibiting different levels of human-induced pressure. Higher values were recorded in the more polluted site (Toulon) for trace metals (Ag, Hg, Pb) as well as for PAHs (Medium Molecular Weight and High Molecular Weight) due to the presence of the city and/or harbour in proximity. For...
Tipo: Text
Palavras-chave: Trace metals; Polycyclic aromatic hydrocarbons; Contamination; Seagrass; Posidonia oceanica; Mediterranean.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00038/14913/15671.pdf

Natural and anthropogenic trace metals in sediments of the Ligurian Sea (Northwestern Mediterranean)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heimbuerger, Lars-eric; Cossa, Daniel; Thibodeau, Benoit; Khripounoff, Alexis; Mas, Virginie; Chiffoleau, Jean-francois; Schmidt, Sabine; Migon, Christophe.
The magnitude and the chronology of anthropogenic impregnation by Hg and other trace metals of environmental concern (V, Cr, Ni, Cu, Zn, Ag, Cd and Pb, including its stable isotopes) in the sediments are determined at the DYFAMED station, a site in the Ligurian Sea (Northwestern Mediterranean) chosen for its supposed open-sea characteristics. The DYFAMED site (VD) is located on the right levee of the Var Canyon turbidite system, at the end of the Middle Valley. In order to trace the influence of the gravity current coming from the canyon on trace metal distribution in the sediment, we studied an additional sediment core (VA) from a terrace of the Var Canyon, and material collected in sediment traps at the both sites at 20 m above sea bottom. The patterns...
Tipo: Text
Palavras-chave: Marine sediments; Sediment traps; Mercury; Trace metals; Lead isotopes; Geochronology.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00073/18435/16125.pdf

Comparison in waterborne Cu, Ni and Pb bioaccumulation kinetics between different gammarid species and populations: Natural variability and influence of metal exposure history
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Urien, N.; Farfarana, A.; Uher, E.; Fechner, Lise; Chaumot, A.; Geffard, O.; Lebrun, J. D.
Kinetic parameters (uptake from solution and elimination rate constants) of Cu, Ni and Pb bioaccumulation were determined from two Gammarus pulex and three Gammarus fossrum wild populations collected from reference sites throughout France in order to assess the inter-species and the natural inter-population variability of metal bioaccumulation kinetics in that sentinel organism. For that, each population was independently exposed for seven days to either 2.5 mu g L-1 Cu (39.3 nM), 40 mu g L-1 Ni (681 nM) or 10 mu g L-1 Pb (48.3 nM) in laboratory controlled conditions, and then placed in unexposed microcosms for a 7-day depuration period. In the same way, the possible influence of metal exposure history on subsequent metal bioaccumulation kinetics was...
Tipo: Text
Palavras-chave: Amphipods; Trace metals; Life history; Kinetic parameters; Inter-population variability.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00417/52840/54270.pdf

Vertical export flux of metals in the Mediterranean Sea
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heimbuerger, Lars-eric; Migon, Christophe; Losno, Rémi; Miquel, Juan-carlos; Thibodeau, Benoit; Stabholz, Marion; Dufour, Aurelie; Leblond, Nathalie.
We examined metal (Al, V, Cr, Mn, Fe, Ni, Cu, Zn, Cd and Pb) and particulate organic carbon (OC) concentrations of the marine vertical export flux at the DYFAMED time-series station in the Northwestern Mediterranean Sea. We present here the first data set of natural and anthropogenic metals from sediment trap moorings deployed at 1000 m-depth between 2003 and 2007 at the DYFAMED site. A highly significant correlation was observed between most metal concentrations, whatever the nature and emission source of the metal. Cu, Zn and Cd exhibit different behaviors, presumably due to their very high solubility and complexation with organic ligands. The observed difference of atmospheric and marine fluxes in terms of temporal variability and elemental...
Tipo: Text
Palavras-chave: Trace metals; Sediment trap; Mediterranean Sea; Vertical export flux; Ballasting.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00176/28774/27247.pdf

The distribution of radionuclides and some trace metals in the water columns of the Japan and Bonin trenches
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nozaki, Y; Yamada, M; Nakanishi, T; Nagaya, Y; Nakamura, K; Shitashima, K; Tsubota, H.
Presented here is the first detailed geochemical data set on the U/Th series Th, Pa, Ac, and Pb isotopes and artificial fallout radionuclides (Sr-90, Cs-137, and Pu isotopes), and some trace elements (V, Zn, Cd, Cu, Mn, and Ni) in two water columns of the Japan and Bonin trenches down to the bottom depths of 7585 m and 9750 m, respectively. Hydrographic properties such as temperature, salinity, dissolved oxygen, and nutrient content within the trench valley remain constant at the same levels as those in the bottom water of the Northwest Pacific basin (typically similar to 6000 m in depth). The radionuclide activities and most trace metal concentrations are also not very different from those in the overlying water at depths of around 5000-6000 m. This means...
Tipo: Text
Palavras-chave: Uranium - thorium; Nucléide artificiel; Balayage; Métal-trace; Temps de résidence; U/Th series nuclides; Artificial radionuclides; Scavenging; Trace metals; Renewal of trench water.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00326/43669/43201.pdf

Statistical analysis of the concentrations of twelve metals in the Ligurian atmospheric aerosol
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Migon, C; Gentili, B; Journel, B.
A correlation analysis based on the concept of singular-value decomposition of a matrix is applied here to an atmospheric aerosol data set, for twelve metals (Al, Ca, Cd, Co, Cu, Fe, Mg, Mn, Na, Ni, Pb and Zn),in the Ligurian Sea coastal environment. An iterative procedure allows atypical samples to be discarded, i.e. samples with characteristics significantly different to those of the whole data set. After five atypical samples have been objectively discarded, the general characteristics of the data set are better described and some features are enhanced according to a decreasing order of importance, For example, the mineral dust character of almost every metal is shown, which points out that the marine recycling component is negligible. Marine (Mg, Na)...
Tipo: Text
Palavras-chave: Mer Ligure; Aérosol atmosphérique; Métaux-traces; Analyse statistique; Ligurian Sea; Atmospheric aerosol; Trace metals; Statistical analysis.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00325/43576/44044.pdf

Concentrations of mercury and other trace elements in two offshore skates: sandy ray Leucoraja circularis and shagreen ray L. fullonica
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nicolaus, E. E. Manuel; Barry, Jon; Bolam, Thi P. C.; Lorance, Pascal; Marandel, Florianne; Phillips, Sophy R. Mccully; Neville, Suzanna; Ellis, Jim R.
Trace metal concentrations in muscle and liver tissues from two offshore species of skate were examined. Concentrations of mercury in muscle of Leucoraja circularis (n = 20; 23–110.5 cm total length, 157–490 m water depth) and L. fullonica (n = 24; 28.5–100 cm total length, 130–426 m water depth) were 0.02–1.8 and 0.04–0.61 mg kg− 1, respectively. Concentrations of both As and Hg increased with total length. Only the largest specimen had a concentration of Hg in muscle &gt; 1.0 mg kg− 1. Data were limited for specimens &gt; 90 cm long, and further studies on contaminants in larger-bodied skates could usefully be undertaken.
Tipo: Text
Palavras-chave: Trace metals; Sandy ray; Shagreen ray; Bay of Biscay; Celtic Sea.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00397/50829/51592.pdf

Comportement chimique et geochimique des elements a l'état de traces dans l'estuaire de la Seine: Synthese des discussions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guegueniat, P.
In the synthesis of discussions about the chemistry of the Seine Bay, the author after a note on natural references for metal concentrations, speaks about fluorides, nutrients, PCB, and metallic elements. In conclusion some suggestions about pollutants transfer towards ecosystems link, are enumerated.
Tipo: Text
Palavras-chave: PCB; Fluorides; Chemical pollution; Trace metals; Food webs; Bioaccumulation; Biogeochemical cycle; Trace elements.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1303.pdf

Modélisation des contaminants en milieu aquatique: Module MET&amp;OR
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thouvenin, Benedicte.
The MET&amp;OR module is a model, written in FORTRAN 90, which calculates the biogeochemical reactions between variables such as trace metal, radioactive tracers, organic or bacterial contaminants (biodegradation, decay, adsorption / desorption, photolysis, hydrolysis, volatilization, partition at equilibrium ..). It groups together classical reactions, described in the literature, to evaluate the source and sink terms which are integrated into the transport equations solved by a hydrodynamic model. It is intended more particularly for marine and coastal waters. This technical documentation aims to present the MET&amp;OR module and the way in which it was coupled to the hydrodynamic model, in particular to MARS-3D.
Tipo: Text
Palavras-chave: Modelisation; Biogéochimie; Contaminants métalliques; Organic contmainants; Contaminants bactériens; Modeling; Biogeochemical; Trace metals; Contaminants organiques; Bacterial contaminant.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00688/79972/83002.pdf

Evaluation des apports fluviatiles dans l''estuaire de la Seine
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Avoine, J.
Economic activities and urbanization along the Seine watershed, are the main factors of increased river discharge with natural deposits. A long term supervision of this river has allowed the assessment of the liquid flow rate, the solid load, and the metallic pollution.
Tipo: Text
Palavras-chave: Seasonal variations; Trace metals; Sediment transport; Fluid flow; Brackishwater pollution; Estuarine sedimentation; River discharge.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1274.pdf

Assessment of contaminant concentrations in sediments, fish and mussels sampled from the North Atlantic and European regional seas within the ICON project
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robinson, Craig D.; Webster, Lynda; Martinez-gomez, Concepcion; Burgeot, Thierry; Gubbins, Matthew J.; Thain, John E.; Vethaak, A. Dick; Mcintosh, Alistair D.; Hylland, Ketil.
Understanding the status of contaminants in the marine environment is a requirement of European Union Directives and the Regional Seas Conventions, so that measures to reduce pollution can be identified and their efficacy assessed. The international ICON workshop (Hylland et al., in this issue) was developed in order to test an integrated approach to assessing both contaminant concentrations and their effects. This paper describes and assesses the concentrations of trace metals, polycyclic aromatic hydrocarbons, and polychlorinated biphenyls in sediments, mussels, and fish collected from estuarine, coastal and offshore waters from Iceland to the Mediterranean Sea. For organic contaminants, concentrations progressively increased from Iceland, to the...
Tipo: Text
Palavras-chave: Integrated assessment; ICES; North Atlantic; North Sea; Baltic Sea; Mediterranean Sea; Polycyclic aromatic hydrocarbons (PAHs); Polychlorinated biphenyls (PCBs); Trace metals; Environmental monitoring.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00324/43520/43051.pdf

Intraspecific variability in membrane proteome, cell growth, and morphometry of the invasive marine neurotoxic dinoflagellate Alexandrium pacificum grown in metal-contaminated conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chetouhi, Cherif; Masseret, Estelle; Satta, Cecilia Teodora; Balliau, Thierry; Laabir, Mohamed; Jean, Natacha.
Over the past decades, the occurrence, distribution and intensity of harmful algal blooms involving the dinoflagellate Alexandrium pacificum have increased in marine coastal areas disturbed by anthropogenic inputs. This invasive species produces saxitoxin, which causes the paralytic shellfish poisoning syndrome in humans upon consumption of contaminated seafood. Blooms of A. pacificum have been reported in metal-contaminated coastal ecosystems, suggesting some ability of these microorganisms to adapt to and/or resist in metal stress conditions. This study seeks to characterize the modifications in membrane proteomes (by 2-D electrophoresis coupled to LC-MS/MS), cell growth and morphometry (measured with an inverted microscope), in response to metal stress...
Tipo: Text
Palavras-chave: Alexandrium pacificum; Harmful algal bloom; Proteomics; Membrane pmteome; Trace metals.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00606/71802/70290.pdf

Les métaux traces (Cd, Pb, Hg) et les hydrocarbures totaux dans les sédiments superficiels de la frange cotière du golfe de Gabès
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Chouba, L.; Mzougui-Aguir, N.
Dans l’objectif de déterminer l’état de la contamination organique et inorganique des sédiments superficiels de la frange côtière du golfe de Gabès, nous avons évalué les concentrations en hydrocarbures aromatiques totaux, en cadmium (Cd), en plomb (Pb) et en mercure (Hg).  L’échantillonnage a été effectué à bord d’une barque motorisée, à l’aide d’une benne Van Veen au niveau de 25 stations. Les concentrations du Cadmium et du Plomb ont été déterminées par Spectrométrie d’Absorption Atomique à Four Graphite (Varian 220Z) alors que pour le Mercure les analyses ont été réalisées par Spectrométrie d’Absorption Atomique à vapeur froide. Les hydrocarbures totaux ont été analysés par UV-Fluorescence (UV-F). Les concentrations du Cadmium et du Mercure dans la...
Tipo: Journal Contribution
Palavras-chave: Cadmium; Coastal waters; Hydrocarbons; Lead; Marine pollution; Mercury; Pollution monitoring; Sediments; Trace metals.
Ano: 2006
URL: http://hdl.handle.net/1834/4275

Estudio de la morfometría de las sagittae en poblaciones de sciaenidos marinos de aguas cálidas del Perú y aguas templado-frías de Argentina
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Volpedo, A.
Otoliths (sagitta, asteriscus and lapillus)are complex structures composed of calcium carbonate, other minerals, and a protein matrix. Otoliths are located in the internal ear of the teleost fishes. The shape and structure of otoliths are specific for each species. For this reason, otoliths are used to identify species in biological and ecological studies.Sciaenids conform a group of fishes of commercial importance, so the handling of this resource is a high-priority topic for the local and national economies of countries that exploit these species. The purpose of this work is to study different aspects of the sagittae of marine sciaenids from Argentina and Peru. The morphology, morphometry and chemical composition has been analyzed in relation to the...
Tipo: Theses and Dissertations
Palavras-chave: Otoliths; Morphometry; Identification keys; Indicator species; Dimensions; Trace metals; Environmental factors; Stocks; Coastal fisheries; Otoliths; Dimensions; Environmental factors; Stocks; Indicator species; Coastal fisheries; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_2283; Http://aims.fao.org/aos/agrovoc/c_2594; Http://aims.fao.org/aos/agrovoc/c_28772; Http://aims.fao.org/aos/agrovoc/c_35790; Http://aims.fao.org/aos/agrovoc/c_1696.
Ano: 2001
URL: http://hdl.handle.net/1834/3132

Sudanese Coastal Water  Composition and Some Environmental Aspects
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ali, Aasim.
Red Sea water samples were collected from four stations in the Sudanese coast at depth of 10 m during July 2011 and analyzed for major ions and trace metals in order to determine their insitu concentration, their distribution patterns, and level of heavy metals contamination in the Sudanese coastal water. The data of the analysis was used in the preparation of the Red Sea artificial water which was used to study how salinity affects the photooxidation of 1,8-dimethylnaphthalene (1,8-DMN) and the water-soluble fraction (WSF) from Norwegian crude oil. The results show a small range of spatial variation for Na+, Mg2+, Ca2+, Cl−, K+, and SO2−4 . Also, the concentration of Na+, Mg2+, Ca2+, Cl−, and SO2−4 in the Sudanese coastal water is high compared to all...
Tipo: Theses and Dissertations
Palavras-chave: Trace metals; Salinity effects.
Ano: 2012
URL: http://hdl.handle.net/1834/4624

Photooxidation of Dimethylnaphthalene in Deionized water, Red Sea Arti cal water, and Red Sea Natural water
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ali, Aasim.
Red Sea water samples were collected from the Sudanese coast at depths of 10 meter during June 2011 and analyzed for major and trace metals in addition to some inorganic anions. Sodium Na, potassium K, strontium Sr, magnesium Mg, calcium Ca, sulfur S, iron Fe, zinc Zn, manganese Mn, nickel Ni, copper Cu, cadmium Cd, cobalt Co, lead Pb, arsenic As, barium Ba, chromium Cr, europium Eu, lanthanum La, silicon Si, and titanium Ti were analyzed using inductively coupled plasma optical emission spectroscopy (ICP-OES) to determine their existing concentration, their distribution patterns, study the level of contamination in the Red Sea Sudanese coastal water, and the data of the analysis was used in the preparation of the Red Sea arti cial water which was used in...
Tipo: Theses and Dissertations
Palavras-chave: Trace metals.
Ano: 2012
URL: http://hdl.handle.net/1834/4555

Etude de la concentration des metaux traces chez "Hexaplex  trunculus " (muricidae) le long du littoral  tunisien
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Tissaoui, Ch.; Chouba, L.; El Abed, O.
La Tunisie dispose d’une ressource importante en coquillages, plusieurs espèces sont commercialisées et elles ont fait l’objet de programmes de qualité pour la sauvegarde de la santé humaine. Dans ce contexte, nous avons réalisé un suivi saisonnier de la concentration de trois métaux traces toxiques, le cadmium (Cd), le plomb (Pb), et le mercure (Hg) dans la totalité de la masse molle, dans le pied et dans les viscères d’un Mollusque Gastéropode, l’Hexaplex trunculus communément appelé en Tunisie « Bakouma ». Les Hexaplex proviennent des golfes de Tunis et de Gabès et des lagunes de Bizerte et de Tunis durant la période 2003 - 2004. Les échantillons sont analysés par spectrométrie d’absorption atomique (SAA) à four graphite et à correction Zeeman (Varian...
Tipo: Journal Contribution
Palavras-chave: Pollution monitoring; Trace metals; Pollution control; Http://aims.fao.org/aos/agrovoc/c_6078.
Ano: 2008
URL: http://hdl.handle.net/1834/4153

Accumulation of trace metals in some benthic invertebrate and fish species revelant to their concentration in water and sediment of lake qarun, Egypt
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Fishar, M.R.A.; Ali, M.H.H.
Concentrations of major metals (Na, K, Ca, Mg) and some trace metals (Fe, Zn, Mn, Ni, Cu, Co, Pb, Cr, Cd) were determined in water, sediment, benthos and some common fish species from Lake Qarun. Water and sediment samples were collected from seven stations where, the benthos and fish species were collected from three sites representing east, middle and west of the lake. Distribution of studied metals showed that, east part generally had higher contamination than west one which may be attributed to the impact of pollution sources in this area which coming from El-Batts Drain and pumping station in the east part. Mollusca and Crustacea especially Barnacles have the highest concentrations of most heavy metals measured more than Polychaeta which make them...
Tipo: Journal Contribution
Palavras-chave: Lake Qarun; Trace metals; Benthos; Fish SEDIMENTS Absorption coefficient Accumulation Biochemical analysis Benthic fish Trace metals Absorption http://aims.fao.org/aos/agrovoc/c_27.
Ano: 2005
URL: http://hdl.handle.net/1834/1215

Distribución y enriquecimiento de metales traza en núcleos de sedimento de tres sistemas costeros del Estado de Sonora, México
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ortega Romero, P.; Vásquez del Castillo, D.
Este trabajo tiene como objetivo principal, conocer el enriquecimiento y distribución de los metales traza y su relación con la materia organic y el tamaño medio de partícula (Mz) en la columna sedimentaria con el fin de determinar su acción e influencia ecológica en el medio ambiente marino.
Tipo: Journal Contribution
Palavras-chave: Distribution; Trace metals; Sediments; Inorganic matter; Organic matter; Distribution; Organic matter; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_5387.
Ano: 1992
URL: http://hdl.handle.net/1834/2299

Etude quantitative et qualitative des métallothioneines chez la daurade "Sparus  aurata" exposée aux métaux lourds
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ameur, S.; Ghedira, J.; Guerbej, H.; Jebali, J.; Bouraoui, J.; Boussetta, H.
Dans l’environnement marin, les éléments traces peuvent s’accumuler dans les organismes à des concentrations supérieures à celles présentes dans l’eau. L’étude de la distribution tissulaire des métaux traces au niveau des organismes qui y sont exposés, constitue un aspect très important pour la compréhension de leur devenir. En outre, le suivi de la réponse biologique spécifique de ces organismes sentinelles aux xénobiotiques complète et consolide l’analyse chimique. Ce travail vise à étudier la distribution tissulaire des métaux traces et des métallothionéines (MTs) chez la daurade «Sparus aurata » traitée par un métal essentiel (le cuivre) et un métal non essentiel (le cadmium) à une concentration de 500µg /Kg de poids frais pendant 48 heures....
Tipo: Journal Contribution
Palavras-chave: Animal organs; Bioaccumulation; Cadmium; Gills; Heavy metals; Metals; Pollutants; Pollution effects; Sediment pollution; Toxicity tests; Trace metals; Marine sciences; Biomarkers of exposure (organisms); Metallic elements.
Ano: 2009
URL: http://hdl.handle.net/1834/4448

Etude de la concentration des métaux traces chez &lt;Hexaplex  trunculus&gt; (muricidae) le long du littoral  Tunisien
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Chouba, L.; Tissaoui, Ch.; El Abed, A.
La Tunisie dispose d’une ressource importante en coquillages, plusieurs espèces sont commercialisées et elles ont fait l’objet de programmes de qualité pour la sauvegarde de la santé humaine. Dans ce contexte, nous avons réalisé un suivi saisonnier de la concentration de trois métaux traces toxiques, le cadmium (Cd), le plomb (Pb), et le mercure (Hg) dans la totalité de la masse molle, dans le pied et dans les viscères d’un Mollusque Gastéropode, l’Hexaplex trunculus communément appelé en Tunisie « Bakouma ». Les Hexaplex proviennent des golfes de Tunis et de Gabès et des lagunes de Bizerte et de Tunis durant la période 2003 - 2004. Les échantillons sont analysés par spectrométrie d’absorption atomique (SAA) à four graphite et à correction Zeeman (Varian...
Tipo: Journal Contribution
Palavras-chave: Hexaplex trunculus; Pollution monitoring; Trace metals; Marine molluscs.
Ano: 2008
URL: http://hdl.handle.net/1834/3777

A comparison of fast destruction methods for the determination of trace metals in biological materials
Provedor de dados: Open Marine Archive
Autores: Luyten, S.; Smeyers-Verbeke, J.; Massart, D.L.
In clinical chemistry it can be very useful to have a rapid method for the determination of trace elements in biological material available. Because the classical wet digestion method which is generally used for the destruction of biological materials requires much attention, two procedures were tried which should be less time consuming or require less attention. The two new procedures which are the soluene (a quaternary ammonium hydroxide) method of Jackson (1) and the method of Adrian (2) utilizing pressure were applied to the determination of Cu and Zn in human brain tissue and in fish meal by atomic absorption spectroscopy.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chemical analysis; Trace metals.
Ano: 1973
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3474

Green algal interactions with physicochemical parameters of some manmade ponds in Zaria, northern Nigeria
Provedor de dados: Revista Brasileira de Botânica
Autores: Chia,Mathias Ahii; Bako,Sunday Paul; Alonge,Samson O; Adamu,Abu Kasim.
Green algal species and their association with physicochemical parameters in some manmade ponds in Zaria, Nigeria were studied from November 2005 to August 2006. Phytoplankton and water samples were collected, preserved and analyzed using standard methods. A total of 27 green algal species divided into 16 families were recorded. Shannon diversity indices ranged from 1.75 to 2.39 in all ponds, dominance index from 0.14 to 0.23 and species evenness 0.56 to 0.64. Closterium sp. and Rhizoclonium hookeri Kuetz. were positively associated with the concentration of Fe, however they were negatively correlated (sensitive) to alkalinity, total dissolved solids and electrical conductivity. Stichococcus bacillaris Naegeli, Staurastrum rotula Nordst. and Sphaeroplea...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chlorophyta; Diversity; Ecology; Lenthic water bodies; Trace metals.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042011000300004

Induced changes in the growth of four plant species due to lead toxicity
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Batista,Adriana A.; Santos,Jorge A. G.; Bomfim,Marcela R.; Moreira,Flávia M.; Leal,Emylly F.; Conceição,Joseane N. da.
ABSTRACT Lead is a toxic metal that affects plant growth and the ecosystem. This study evaluated the lead (Pb) bioaccumulation potential of vetiver (Vetiveria zizanioides L.), sunflower (Helianthus annuus L.), elephant ear (Alocasia macrorrhiza) and ‘embaúba’ (Cecropia sp.). The plant species were tested in a 50% nutrient solution - Hoagland and Arnon, constantly aerated, containing five Pb concentrations: 0, 50, 100, 200 and 400 mg L-1). The treatments were arranged in a completely randomized design in a 4 x 5 factorial scheme, with four replicates. The Pb contents in the plants increased linearly with the Pb exposure concentration. Vetiver was the species with the highest Pb content in the shoots (260.24 mg kg-1) and sunflower, in the roots (44925.20 mg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace metals; Remediation; Phytostabilization.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500327

Chemical composition of phytoplankton from the estuaries of Eastern Amazonia
Provedor de dados: Acta Amazonica
Autores: Vilhena,Maria do Perpetuo Socorro Progene; Costa,Marcondes Lima da; Berrêdo,José Francisco; Paiva,Rosildo Santos; Almeida,Pryscila Denise.
Phytoplankton is important bioindicator of chemical and biological modifications of natural ecosystems. The objective of this study was to determine the total chemical composition of the phytoplankton of the Pará and Mocajuba estuaries on the eastern coast of the Amazon region in the Brazilian state of Pará. The chemical composition of the surface water, bottom sediments (total sample and bioavailable fraction), and the phytoplankton were determined by inductively coupled plasma optical emission spectrometry. Phytoplankton contained high concentrations of Ca, P, Mn, Fe, Zn, Al, Ba, and Pb. The phytoplankton of the Mocajuba estuary is rich in Fe (2,967-84,750 µg g-1), while those from the Pará is rich in Al (1,216-15,389 µgg-1), probably reflecting...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sediments; Trace metals; Plankton; Surface water.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000400012

Trace metals and PAHs in topsoils of the University campus in the megacity of São Paulo, Brazil
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: BOUROTTE,CHRISTINE L.M.; SUGAUARA,LUCY E.; MARCHI,MARY R.R. DE; SOUTO-OLIVEIRA,CARLOS E.
Abstract: The aim of this study is to discuss the concentration distribution, composition and possible sources of trace metals and 13 PAHs in topsoils of the University campus, in the city of São Paulo, the largest city of South America. Mineralogy and granulometry of topsoils (0-10 cm) samples, were determined and As, Ba, Cd, Co, Cr, Cu, Mo, Ni, Pb, Sb, V, Zn, Hg, Pt, Pd and PAHs concentrations were quantified in the bulk fraction. The average clay content of soils was 221±61.8 g kg-1 and total carbon was low (mean of 25 g kg-1). Concentrations of metals were generally lower than the reference value established by the São Paulo State Environmental Agency and other studies in the São Paulo urban area, except for Cd, Ni, Pb, Cr and Zn. The mean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Urban topsoils; Trace metals; PAHs; PMF.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500501

Evaluation of trace metals (cadmium, chromium, copper and zinc) in tissues of a commercially important fish (Leporinus obtusidens) from Guaíba Lake, Southern Brazil
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Costa,Silene de Carvalho; Hartz,Sandra Maria.
Concentrations of Cd, Cr, Cu and Zn were determined in liver and muscle of Leporinus obtusidens. During 2003, the fishes (N = 54) were sampled from three sites along Guaíba Lake (north, central and south zones). The hypotheses tested assumed that there were differences in the location and date as to levels of contamination, association between the trace metal content in the fishes and size, and that the sex influenced metal accumulation. Possible risks of contaminated fish consumption to human health were also evaluated. The level of mean concentration (µg/g) of metals in tissues was higher in liver than muscle: [Cd] = 2.32♂; [Cr] = 0.08♀; [Cu] = 30.82♀ and [Zn] = 97.77♀. The results showed differences between the local and date sampling for all metals...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trace metals; Leporinus obtusidens; Environmental contamination; Guaíba Lake; Southern Brazil.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100029