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Registros recuperados: 9
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ASSESSMENT OF BIOAVAILABILITY OF HEAVY METALS AFTER VERMICOMPOSTING IN THE PRESENCE OF ELECTRONIC WASTE Rev. Bras. Ciênc. Solo
Damasceno,Odilaine Inácio de Carvalho; Reis,César; Reis,Efraim Lázaro; Bellato,Carlos Roberto; Fidêncio,Paulo Henrique.
ABSTRACT Heavy metals contained in electronic waste, if discarded improperly, can become bioavailable after vermicomposting, posing a risk to the environment. Small-scale vermicomposting experiments were carried out with printed circuit boards (PCBs) to investigate the migration of heavy metals (Cu, Pb, Zn, Ni, and Sn) to the final compost, as well as the mobility and bioavailability of these metals. High total levels of Pb, Sn and Cu in samples of manure with electronic waste (MEW) and vegetables with electronic waste (VEW) were detected. Based on the initial metal levels in the PCBs and their concentration in the resulting compost, the order of migration of these metals to the MEW and VEW samples was Sn (23.1 %)>Pb (18.4 %)>Ni (4.63 %)>Zn (0.46...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Electronic waste; Metal contamination; Lead; Sequential extraction.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601786
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Changes in the sediment trace metal contamination after the commissioning of a municipal wastewater treatment plant in the Souss estuary (South Morocco) ArchiMer
Moukrim, A; Chiffoleau, Jean-francois; Cheggour, M; Burgeot, Thierry.
Monthly samples of sediment were collected from the Souss estuary, to determine the changes which have occurred in the concentrations of ten metals between 2001 when the low estuary was receiving the wastewaters from Agadir city and 2003 after stopping the sewage dumping. The annual contents of Cu, Fe, Zn (in 2001) and those of Cr, Cu, Fe, Mn, Ni, Pb, and Zn (in 2003) showed significant correlations with those of Al, indicating that fluctuations of their concentrations were only due to those of the aluminosilicate fraction of the clayey sediment. After normalization of these metallic concentrations in relation to those of Al, the contents of the different metals showed insignificant correlations between both years, except for Zn which significantly dropped...
Tipo: Text Palavras-chave: Souss estuary; Wastewater; Sediment; Metal contamination.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-5923.pdf
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DNA damage in the kidney tissue cells of the fish Rhamdia quelen after trophic contamination with aluminum sulfate Genet. Mol. Biol.
Klingelfus,Tatiane; Costa,Paula Moiana da; Scherer,Marcos; Cestari,Marta Margarete.
Abstract Even though aluminum is the third most common element present in the earth's crust, information regarding its toxicity remains scarce. It is known that in certain cases, aluminum is neurotoxic, but its effect in other tissues is unknown. The aim of this work was to analyze the genotoxic potential of aluminum sulfate in kidney tissue of the fish Rhamdia quelen after trophic contamination for 60 days. Sixty four fish were subdivided into the following groups: negative control, 5 mg, 50 mg and 500 mg of aluminum sulfate per kg of fish. Samples of the posterior kidney were taken and prepared to obtain mitotic metaphase, as well as the comet assay. The three types of chromosomal abnormalities (CA) found were categorized as chromatid breaks,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish; Metal contamination; Chromosomal abnormalities; Comet assay.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000400499
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Effect of nickel in the degradation of oil in soils contaminated with petroleum and nickel. Repositório Alice
TAKETANI, N. F.; TAKETANI, R. G.; LEITE, S. G. F.; MELO, I. S. de; LIMA-RIZZO, A. C.; ANDREOTE, F. D.; CUNHA, C. D. da.
Abstract: The pollution originated from the petrochemical industry is currently one of the main environmental concerns. Most of this is due to the high volume of toxic hydrocarbons that are produced and transported around the globe. However, this industry is also associated with toxic metals that are minor components of petroleum and used during refining processes. Here we have evaluated the impact of nickel in the biodegradation of crude oil in natural soils. We have assessed bacterial community profiles in these samples using ion torrent 16S rRNA gene sequencing and Real-Time PCR quantification and shotgun metagenome sequencing. We have found that the contamination with oil and nickel reduced the bacterial abundance compared with only soil. There was...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Metagenome; Metal contamination; Hydrocarbon remediation; Contaminação; Poluição do Solo; Petróleo; Níquel; Bactéria; Metagenomics; Soil pollution; Petroleum; Actinobacteria; Decontamination.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1125486
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Influence of accumulation of heaps of steel slag on the environment: determination of heavy metals content in the soils Anais da ABC (AABC)
Garcia-Guinea,Javier; Correcher,Virgilio; Recio-Vazquez,Lorena; Crespo-Feo,Elena; Gonzalez-Martin,Rafael; Tormo,Laura.
The presence of high level of heavy metals involves a human healthy risk that could induce chronic diseases. This work reports on the metal contamination due to heaps of steel-slag accumulated during more than 40 years in allotments and industrial areas in the southern part of Madrid (Spain). Several slag and soil samples were collected in an area of 10 km² and characterized by different conventional (XRD and XRF) and no so common methods (ESEM, thermoluminescence and EDS-WDS). The analysis reveal the presence of: (i) important amounts of Fe (43%), Mg (26%), Cr (1.1%), Mn (4.6%), S (6.5%) in the form of Fe-rich slag phases (wustite, magnetite...), Si and Ca-rich phases (larnite, ghelenite...), Cr (chromite), Mn (bustamite) and graphite, (ii) traces of some...
Tipo: Info:eu-repo/semantics/article Palavras-chave: EDS; ESEM; Metal contamination; Steel slag; TL; XRD; XRF.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000200003
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Retrospective study of metal contamination time trends in the French part of the Bay of Biscay ArchiMer
Boutier, Bernard; Quintin, Jean-yves; Rozuel, Emmanuelle; Auger, Dominique; Bretaudeau-sanjuan, Jane.
Two cores were sampled in the Bay of Biscay: one a few miles off the Gironde estuary (pointe de la Coubre), the other near the Spanish border (Capbreton canyon) to study past variations in sediment contamination. Radiochronology (210Pb, 137Cs) and total metal determinations by ICP-MS allowed the study of time trends for metal concentrations in sediment. Off the Gironde, during the time interval recorded by the core (1958–1999), all metal concentrations remained less than OSPAR background values. Some variations occurred along the Cd and Zn profiles, which may correspond to a very attenuated signal from the Gironde outputs. This suggests that this area was not submitted to any significant anthropogenic input of metals between 1958 and 1999. In the canyon of...
Tipo: Text Palavras-chave: Sediment; Metal contamination; Dating; Cores; Time trends.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00061/17254/16094.pdf
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Trace metals assessment in water, sediment, mussel and seagrass species - Validation of the use of Posidonia oceanica as a metal biomonitor ArchiMer
Lafabrie, Céline; Pergent, G; Kantin, Roger; Pergent Martini, C; Gonzalez, Jean-louis.
The accumulation of trace metals (Cd, Co, Cr, Hg, Ni and Pb) was measured in water, sediment, the mussel Mytilus galloprovincialis and the seagrass Posidonia oceanica. Samples were collected in three locations of the north-western Mediterranean (Canari, Livorno and Porto-Torres) which present different levels and sources of human impact. Analyses in the different compartments (water, sediment, M. galloprovincialis and P. oceanica) have allowed to identify Canari as the most Cd, Co, Cr and Ni contaminated site; Livorno as the most Hg contaminated and Porto-Torres as the most Pb contaminated. Furthermore, for the first time, metal concentrations found in P. oceanica have been compared with those found in the water column, in the sediment and in the...
Tipo: Text Palavras-chave: Mediterranean sea; Marine organisms; Sediment; Seawater; Biomonitoring; Metal contamination.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3106.pdf
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Utilisation de Posidonia oceanica (L.) Delile comme bio-indicateur de la contamination métallique ArchiMer
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
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Zinc isotopes as tracers of anthropogenic sources and biogeochemical processes in contaminated mangroves ArchiMer
Ferreira Araujo, Daniel; Machado, Wilson; Weiss, Dominik; Mulholland, Daniel S.; Garnier, Jeremie; Souto-oliveira, Carlos E.; Babinski, Marly.
Recent work has shown that variations in zinc (Zn) isotope ratios enable us to identify contamination sources in the terrestrial environment and uptake processes in higher plants. Here in this study, we demonstrate that this also holds true for mangrove forests, which play an important role in the biogeochemical cycling of metals in tropical coastal ecosystems and that are seriously threatened by anthropogenic pollution. To this end, we determined zinc concentration and isotope composition (expressed using the δ66Zn notation relative to the JMC 3-0749-L standard) in sediments and tree leaves collected from a mangrove close to Rio de Janeiro in Brazil. The δ66ZnJMC values of sediments vary between +0.36 and + 0.84‰ and fall on a mixing line between detrital...
Tipo: Text Palavras-chave: Metal transition isotopes; Metal contamination; Mass spectrometry; Coastal ecosystems; Mangrove leaves.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00440/55196/56660.pdf
Registros recuperados: 9
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