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Avaliação da presença de metais pesados em nove méis produzidos e comercializados no Distrito Federal. Repositório Alice
ROSA-CAMPOS, A. A.; ROCHA, J. E. da S.; BORGO, L. A.; SILVA, M. S. da..
Resumo: O mel brasileiro é produzido principalmente por abelhas africanizadas a partir do néctar ou da secreção das plantas e, devido às suas características genéticas dessas espécies de abelhas, dispensa o uso de antibióticos e pesticidas, como acaricidas e fungicidas. A composição das amostras de méis está intimamente relacionada com o tipo de florada utilizada por estas abelhas para a elaboração do produto final. Um dos componentes de grande importância são os minerais presentes no mel que representam de 0,02% a 1%. Dentre estes minerais observamos os chamados metais pesados, que podem indicar tanto a origem geográfica do mel quanto o nível de poluição ambiental por estes metais. Logo, faz-se necessário a pesquisa da presença ou não de metais pesados...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Abelha; Mel; Metal pesado; Chumbo; Cobre; Cromo; Níquel; Zinco; Honey bees; Honey; Heavy metals; Lead; Copper; Chromium; Nickel; Zinc.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/977384
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Biodisponibilidade de chumbo por extratores químicos em solo tratado com ácidos húmicos e carvão ativado. Repositório Alice
SANTOS, N. M. dos; ACCIOLY, A. M. de A.; NASCIMENTO, C. W. A. do; SILVA, I. R.; SANTOS, J. A. G..
A contaminação de solos por chumbo no município de Santo Amaro da Purificação-BA se originou a partir da instalação na cidade de uma metalúrgica na década de 60 e representa um sério risco à população local. A determinação dos teores disponíveis de Pb no solo é uma ferramenta importante para monitorar os riscos desta contaminação. No entanto, diferentes métodos são utilizados para determinar os teores disponíveis de Pb no solo, o que gera valores distintos entre os extratores. O objetivo do presente trabalho foi comparar a eficiência das extrações feitas com solução Mehlich 1, DTPA e CaCl2, na avaliação da disponibilidade Pb em solo tratado com diferentes amenizantes. A amostra de solo utilizada no experimento foi coletada próximo à metalúrgica. As doses...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Chumbo; Poluição; Solo; Metal pesado; Lead; Heavy metals; Pollution; Soil.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1028280
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BIOMASS PRODUCTION AND HEAVY METAL ABSORPTIONBY FOUR PLANTS GROWN AT THE MORAVIA DUMP, MEDELLÍN, COLOMBIA. Acta biol.Colomb.
SOLANGE SÁNCHEZ,MARÍA; TORRENEGRA,RUBÉN DARÍO; MARTÍNEZ,HERNÁN; SALAZAR,CLAUDIA EUGENIA; BARAHONA,ROLANDO.
Dumps are sites where the presence of high heavy metal (HM) concentration is a common occurrence, creating the need for implementing restoration processes immediately after their closure. In the 7.6 ha and 45 m high Morro de Moravia dump, arose from the disposal of Medellín solid wastes from 1974 to 1984, previous studies have demonstrated high contents of contaminants, including HM, prompting the need to identify effective mechanisms to implement its restoration. The objective of this study was to evaluate the adaptation, growth and phytoremediation capacity of Bidens pilosa, Lepidium virginicum, Brachiaria decumbens and Arachis pintoi. Content of HM (mg/kg) in Moravia residue matrix went from 17 to 8193 for Pb, 44 to 564 for Cr, 0.2 to 339 for Cd and 77...
Tipo: Journal article Palavras-chave: Bidens pilosa; Brachiaria decumbens; Chromium; Lead; Phytoremediation.
Ano: 2010 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2010000200019
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Contaminação por chumbo na serrapilheira do Parque Nacional da Tijuca - RJ Acta Botanica
Oliveira,Rogério Ribeiro de; Lacerda,Luiz Drude de.
As matas formadoras do Parque Nacional da Tijuca, Rio de Janeiro, apresentaram em sua serrapilheira um teor médio de chumbo de 16,2 µg/g ao longo de um ano. A entrada do metal no sistema via queda da serrapilheira foi de 140 g/ha/ano. O Pb atinge o sistema florestal pela deposição atmosférica, e tem origem provável na queima de combustíveis (gasolina e petróleo)
Tipo: Info:eu-repo/semantics/article Palavras-chave: Litter; Lead; Tijuca National Park.
Ano: 1987 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061987000300016
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Distribuição espacial de metais pesados em solos do entorno da baia de Todos os Santos - BA. Repositório Alice
SANTOS, N. M. dos; NASCIMENTO, C. W. A. do; ACCIOLY, A. M. de A..
A baía de Todos os Santos é conhecida por um dos mais importantes casos de contaminação urbana por chumbo no mundo. O presente estudo foi realizado para avaliar a distribuição espacial e fontes de Pb, Zn, As, Cd e Hg em solos circundante a BTS usando análise geoestatística. Um total de 114 amostras de solo superficial (0,0 - 0,2 m de profundidade), foram coletadas em 38 locais de amostragens e a concentração de Pb, Zn, As, Cd e Hg foram determinadas em ICP-OES ou AA-FIAS após digestão em micro-ondas. Mapas de distribuição espacial foram feitos usando o método da interpolação de Krigagem. As maiores concentrações de Pb, Zn e Cd no solo, foram encontrados próximo a cidade de Santo Amaro da Purificação, onde existe uma fundição de chumbo abandonada,...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Solo; Chumbo; Soil; Lead.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1026472
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Ecotoxicological Effects of Three Heavy Metals on the Root Growth of Four Vascular Plants Agricultura Técnica
Iannacone O.,José; Alvariño F.,Lorena.
Environmental risk assessment (ERA) of terrestrial environments polluted by heavy metals in Peru requires standardized biological organisms, the use of which is simple, practical, sensitive and repeatable, such as seeds of higher plants used in eco-toxicological bioassays. The aim of this research was to evaluate the phytotoxic effects of Cr6+, Hg2+ and Pb2+ as potassium dichromate (K2Cr(2)0(7)), mercury chloride (Cl2Hg) and lead acetate ((CH3C00)2Pb), respectively, on growing roots of four species of higher terrestrial plants: onions (Allium cepa L., Liliaceae), red beets (Beta vulgaris L., Chenopodiaceae), rice (Oriza sativa L., Poaceae) and radishes (Raphanus sativus L., Brassicaceae) at 192 h (8 days) exposure. Bioassays of static sub-lethal toxicity...
Tipo: Journal article Palavras-chave: Heavy metals; Peru; Seeds; Vascular plants; Seeds; Mining waste; Chromium; Mercury; Lead.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072005000200009
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Effect of lead acetate on neurobehavioral development of rats BJMBR
Mello,C.F.; Kraemer,C.K.; Filippin,A.; Morsch,V.M.; Rodrigues,A.L.S.; Martins,A.F.; Rubin,M.A..
We investigated the effects of lead exposure during the pre- and postnatal period on the neurobehavioral development of female Wistar rats (70-75 days of age, 120-150 g) using a protocol of lead intoxication that does not affect weight gain. Wistar rats were submitted to lead acetate intoxication by giving their dams 1.0 mM lead acetate. Control dams received deionized water. Growth and neuromotor development were assessed by monitoring daily the following parameters in 20 litters: body weight, ear unfolding, incisor eruption, eye opening, righting, palmar grasp, negative geotaxis, cliff avoidance and startle reflex. Spontaneous alternation was assessed on postnatal day 17 using a T maze. The animals' ability to equilibrate on a beaker rim was measured on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lead; Neurobehavioral development; Undernutrition; Heavy metal intoxication; Teratology; Rat.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000700010
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Geobacillus stearothermophilus LV cadA gene mediates resistance to cadmium, lead and zinc in zntA mutants of Salmonella entérica serovar Typhimurium Biol. Res.
PÉREZ,JOSÉ M; PRADEÑAS,GONZALO A; NAVARRO,CLAUDIO A; HENRÍQUEZ,DANIEL R; PICHUANTES,SERGIO E; VÁSQUEZ,CLAUDIO C.
Salmonella entérica serovar Typhimurium cells expressing the cadA gene of Geobacillus stearothermophilus LV exhibit a hypersensitive phenotype to cadmium chloride. Deletion of the ORF STM3576 from the Salmonella genome resulted in cadmium, lead and zinc sensitivity, confirming that this ORF is a homologue of the zntA gene. The observed sensitivity was reverted upon expression of the G. stearothermophilus LV cadA gene. These results indicate that the cadA gene product is involved in Cd, Pb and Zn resistance as a classical P-type ATPase and strongly suggest that the observed hypersensitive phenotype to these metals can be related to the function of the host ·zntA gene product
Tipo: Journal article Palavras-chave: CadA; Cadmium; Lead; P-type ATPase; Zinc; ZntA.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000500009
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Heavy metal uptake by agro based waste materials Electron. J. Biotechnol.
Qaiser,Suleman; Saleemi,Anwar R; Mahmood Ahmad,Muhammad.
Presence of heavy metals in the aquatic systems has become a serious problem. As a result, there has been a great deal of attention given to new technologies for removal of heavy metal ions from contaminated waters. Biosorption is one such emerging technology which utilized naturally occurring waste materials to sequester heavy metals from industrial wastewater. The aim of the present study was to utilize the locally available agricultural waste materials for heavy metal removal from industrial wastewater. The wastewater containing lead and hexavalent chromium was treated with biomass prepared from ficus religiosa leaves. It was fund that a time of one hr was sufficient for sorption to attain equilibrium. The equilibrium sorption capacity after one hr was...
Tipo: Journal article Palavras-chave: Biosorption; Ficus religiosa leaves; Hexavalent chromium; Kinetics; Lead; Wastewater.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000300008
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Influence of natural radon and metal contamination on surface water quality from a Brazilian Semiarid Region Biological Sciences
Dantas, Richelly da Costa; Navoni, Julio Alejandro; Ferreira, Douglisnilson de Morais; Costa, Thomas Ferreira da; Medeiros, Silvia Regina Batistuzzo de; Amaral, Viviane Souza do.
The Brazilian semiarid region presents some adverse environmental conditions for the settled population such as a restricted water availability and the presence of radon and metal natural sources that can contaminate the water reservoirs and consequently become a concern for human health. The present study evaluated the water quality of the Riacho das Cachoeiras Dam located in the urban area of Lajes Pintadas (state of Rio Grande do Norte, Brazil) as source for human consumption. An analysis of Physicochemical parameters, heavy metal content and Radon in water samples was performed along with the assessment of the water mutagenic potential through Micronucleus Test (MN) on Tradescantia pallida and Oreochromis niloticus. The content of metals in water for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Area: Genetica. Sub-area: Mutagenese radiation; Lead; Mutagenicity; Micronucleus; Geogenic contamination. Genetica.
Ano: 2017 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/27787
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Le plomb en milieu marin. Biogeochimie et ecotoxicologie ArchiMer
Cossa, Daniel; Elbaz-poulichet, Françoise; Gnassia-barelli, Mauricette; Romeo, Michèle.
This report synthesises the knowledge on the biogeochemical cycle, bioconcentration processes and ecotoxicity of lead in the marine environment. Man induced changes on the lead cycle, especially along the French coasts are reviewed. Concentration levels, mechanisms and fluxes between geochemical reservoirs are assessed. Emphasis is given on sublethal effects and toxicity mechanisms. Quality standards used in European Community countries are listed. Conclusions and recommendations for environmental management and research are given.
Tipo: Text Palavras-chave: Ecotoxicology; Contamination; Biogeochemistry; Lead; Ecotoxicologie; Contamination; Biogeochimie; Plomb.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/1993/rapport-1449.pdf
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Lead biosorption onto waste beer yeast by-product: a means to decontaminate effluent generated from battery manufacturing industry Electron. J. Biotechnol.
Parvathi,Krishnakumar; Nagendran,Ramachandramurthy; Nareshkumar,Radhakrishnan.
This paper projects the potential of waste beer yeast Saccharomyces cerevisiae in biosorbing lead from battery manufacturing industrial effluent. Experiments were carried out as a function of pH, biosorbent concentration, lead concentration and agitation speed. Specific lead uptake of 2.34 mg/g was recorded and the data gave good fits for Freundlich and Langmuir models with Kf and Qmax values of 0.5149 and 55.71 mg/g. The roles played by amines, carboxylic acids, phosphates, sulfhydryl group and lipids in lead biosorption were studied. Electrostatic attraction may be the mechanism of biosorption. The extent of contribution of the functional groups and lipids to lead biosorption was in the order: carboxylic acids > lipids > amines > phosphates....
Tipo: Journal article Palavras-chave: Biosorption; Electrostatic attraction; Freundlich; Langmuir; Functional group; Lead; Yeast.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000100009
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Lead contamination of small cetaceans in European waters - The use of stable isotopes for identifying the sources of lead exposure ArchiMer
Caurant, Florence; Aubail, A; Lahaye, V; Van Canneyt, O; Rogan, E; Lopez, A; Addink, M; Churlaud, C; Robert, M; Bustamante, Paco.
Lead concentrations and isotopic composition have been measured in bone and teeth of small cetaceans belonging to three species (Delphinus delphis, Phocoena phocoena and Stenella coeruleoalba), to evaluate the toxicological risk and to determine sources of lead in the European waters. Lead concentrations, far lower than threshold value inducing toxic effects in human, were higher in teeth than in bones, but highly correlated between the two tissues (r = 0.92, p < 0.001). Large variations of Pb-206/Pb-207 values in bone tissue showed that cetaceans must be submitted to various atmospheric influences. No geographical differences appeared which is consistent with studies on their distribution indicating seasonal movements between Brittany waters and the...
Tipo: Text Palavras-chave: Lead; Hard tissues; Heavy metals; Harbour porpoises; Striped dolphins; Common dolphins; Northeast Atlantic; Temporal trends; Biomonitoring.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1813.pdf
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Lead (Pb2+) and cadmium (Cd2+) inhibit the dipsogenic action of central beta-adrenergic stimulation by isoproterenol BJMBR
We have previously demonstrated that acute third ventricle injections of both Pb2+ and Cd2+ impair the dipsogenic response elicited by three different situations: dehydration and central cholinergic or angiotensinergic stimulation. ß-Adrenergic activation is part of the multifactorial integrated systems operating in drinking behavior control in the central nervous system. In the present study acute third ventricle injections of Pb2+ (3, 30 and 300 pmol/rat) or Cd2+ (0.3, 3 and 30 pmol/rat) blocked the dipsogenic response induced by third ventricle injections of isoproterenol (ISO; 160 nmol/rat) in a dose-dependent manner. Normohydrated animals receiving ISO + NaAc (sodium acetate) or saline (controls) displayed a high water intake after 120 min (ISO +...
Palavras-chave: Lead; Cadmium; Water intake; Isoproterenol.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000300018
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Les métaux traces (Cd, Pb, Hg) et les hydrocarbures totaux dans les sédiments superficiels de la frange cotière du golfe de Gabès OceanDocs
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
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Méthode de dosage du cadmium, du cuivre, du plomb et du zinc dans la chair de poissons ArchiMer
Auger, Dominique.
An analytical technique for cadmium, copper, lead and zinc determination in fish tissue used in monitoring programmes is described. Atomic absorption spectrophotometry on nitric digested samples is performed.
Tipo: Text Palavras-chave: Cadmium; Cuivre; Poisson; Plomb; Zinc; Analyse; Cadmium; Copper; Lead; Zinc; Fish; Determination.
Ano: 1989 URL: https://archimer.ifremer.fr/doc/00489/60059/63343.pdf
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Opiatergic participation in the thirst-inhibiting effect of acute third ventricle injections of cadmium (Cd2+) and lead (Pb2+) BJMBR
De-Castro-e-Silva,E.; Luz,C.P.; Sarmento,C.; Nascimento,T.; Gonzalez,V.; Marinho,C.A.; Castro,L.; Oliveira,P.; Santana Jr.,P.; De-Oliveira,I.R.; De-Paula,S.; Lima,A.K.S.; Fregoneze,J.B..
We have previously demonstrated that acute third ventricle injections of both lead and cadmium prevent the dipsogenic response elicited by dehydration or by central injections of dipsogenic agents such as angiotensin II, carbachol and isoproterenol in rats. We have also shown that the antidipsogenic action of cadmium may be due, at least in part, to activation of thirst-inhibitory central serotonergic pathways. In the present paper we show that in Wistar male rats the antidipsogenic effect of both lead acetate (3.0 nmol/rat) and cadmium chloride (3.0 nmol/rat) may be partially dependent on the activation of brain opiatergic pathways since central injections of naloxone (82.5 nmol/rat), a non-selective opioid antagonist, blunt the thirst-inhibiting effect...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Cadmium; Lead; Water intake; Opioids; Rats.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000600013
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PHYTO-REMEDIATION OF LEAD-CONTAMINATED SOIL USING AMARANTHUS CRUENTUS AgEcon
Opeolu, B.O.; Bamgbose, O.; Arowolo, T.A.; Kadiri, S.J..
Previous studies have shown that some vegetables have the ability to absorb metals from soil. Since they are early maturity species, they possess the potential to be used as phytoremediating agents. Also, synthetic chelates have been found to induce lead desorption from soil matrix, thereby enhancing uptake into plant tissues. Therefore, a study was carried out to determine the potential of Amaranthus cruentus as a soil lead remediating plant. The experiment was carried out using a randomized block design. Soil samples were subjected to five levels of lead contamination namely control, 600ppm, 600ppm + EDTA, 1800ppm and 1800ppm + EDTA, each treatment had five replicates. Three plants each were carefully transplanted from nursery to experimental pots and...
Tipo: Report Palavras-chave: Amaranthus cruentus; Lead; Phytoremediation; Soil; Land Economics/Use.
Ano: 2005 URL: http://purl.umn.edu/54398
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Policy-Induced Technology Adoption: Evidence from the U.S. Lead Phasedown AgEcon
Kerr, Suzi; Newell, Richard G..
The theory of environmental regulation suggests that economic instruments, such as taxes and tradable permits, create more effective technology adoption incentives than conventional regulatory standards. We explore this issue for an important industry undergoing technological responses to a dramatic decrease in allowed pollution levels - the petroleum industry's phasedown of lead in gasoline. Using a panel of refineries from 1971 to 1995, we provide some of the first direct evidence that alternative policies affect the pattern of adoption in expected ways. Importantly, we find that the tradable permit system used during the lead phasedown provided incentives for more efficient technology adoption decisions. Where environmentally appropriate, this suggests...
Tipo: Working or Discussion Paper Palavras-chave: Technology; Adoption; Diffusion; Environment; Regulation; Lead; Gasoline; Tradable permit; Incentive-based policy; Research and Development/Tech Change/Emerging Technologies; C41; L71; O31; O33; Q28; Q48.
Ano: 2001 URL: http://purl.umn.edu/10834
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Toxicity of copper, mercury and lead to a marine nematode OMA
Vranken, G.; Heip, C.H.R..
Toxicity of copper, lead and mercury to the nematode <i>Diplolaimella</i> spec 1 is studied. Mortality responses obtained demonstrate high resistance to heavy metals. Population growth parameters as the intrinsic rate of natural increase and net-reproductivity are significantly depressed at copper-concentrations which cause no juvenile mortality. The lowest concentrations tested caused significant inhibition of development rate in both sexes. For this particular nematode species suppression of fecundity and developmental inhibition are more reliable criteria, determining non-exceedable limits with regard to environmental safety. Our tests show that nematode productivity may be significantly depressed at copper levels found in some areas of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Copper; Lead; Mercury; Toxicity; Nematoda [Nematodes].
Ano: 1986 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3250
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