Assessment of the environmental significance of heavy metal pollution in surficial sediments of the River Po

Farkas, Anna; Erratico, Claudio; Viganò, Luigi

doi:10.1016/j.chemosphere.2006.12.099

Cited by 260 publications

(127 citation statements)

References 33 publications

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“…O Ni apresentou as maiores taxas de recuperação para o material de referência utilizado, variando de 86,4% a 106%. É bem conhecido que a granulometria e o teor de matéria orgânica são fatores importantes que afetam a distribuição de metais traço (Farkas et al 2009;Bartoli et al 2012). Sedimentos de granulometria mais fina tendem a apresentar teores de metais relativamente mais elevados, em parte devido à elevada superfície específica das partículas, que aumenta a adsorção superficial no mineral e na matéria orgânica (Rubio et al 2000).…”

Section: Resultsunclassified

Distribuição geoquímica e biodisponibilidade de metais traço em sedimentos no Rio Bento Gomes, Poconé - MT, Brasil

et al. 2016

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RESUMOO sedimento é um dos compartimentos mais importantes dos ecossistemas aquáticos, possui papel importante no transporte e acumulação de metais. Este estudo teve por objetivo determinar a concentração de metais nas frações geoquímicas de sedimentos do Rio Bento Gomes, Pantanal de Poconé (MT) por meio da extração seletiva e sequencial, a fim de avaliar a distribuição e mobilidade dos metais. Os sedimentos foram coletados nos períodos seco e chuvoso em oito pontos distintos, e os metais (Fe, Mn, Cr, Cu, Zn e Ni) extraídos dos sedimentos por procedimentos de extração sequencial (baseada no protocolo proposto por BCR -Community Bureau of Reference) e de extração seletiva (baseada no protocolo 3050B da Environmental Protection Agency of the United States), utilizando-se materiais de referência certificados para validação do método analítico. Todos os metais apresentaram teores abaixo do limite previsto na Resolução CONAMA nº 454/2012 no período seco, com exceção do Ni no período chuvoso (maior que 18 mg kg -1 ). Os estudos de fracionamento indicaram que os metais foram encontrados nas frações mobilizáveis do sedimento, especialmente associados aos óxidos de ferro. Os metais mais móveis e, consequentemente, mais biodisponíveis, foram o manganês, zinco e níquel, principalmente na época chuvosa. Maiores teores de cobre foram encontrados nas frações residuais do sedimento, indicando baixa mobilidade no meio aquático. A sequência de mobilidade dos metais estudados foi Mn > Zn > Ni > Cr > Cu > Fe. PALAVRAS-CHAVE: Recursos hídricos, áreas úmidas, extração sequencial. Geochemical distribution and bioavailability of trace metals in sediments of the Bento Gomes River, Poconé -MT, Brazil ABSTRACTThe sediment is one of the major compartments of aquatic ecosystems, it plays an important role in the transport and accumulation of metal. This study aimed to determine the concentration of metals in geochemical fractions of the Bento Gomes River sediments, Pantanal of Poconé (MT) through selective extraction and sequential in order to assess the distribution and mobility of metals. The sediments were collected in the rainy and dry seasons in eight different points, and the metals (Fe, Mn, Cr, Cu, Zn and Ni) extracted from sediments by sequential extraction procedures (based on the proposed by BCR protocol -Community Bureau of Reference) and selective extraction (based on the 3050B protocol of the Environmental Protection Agency of the United States), using certified reference materials for validation of the analytical method. All metals showed levels below the limits established by CONAMA Resolution nº 454/2012 in the dry season, except for Ni in the rainy season (greater than 18 mg kg -1 ). The fractionation studies indicated that the metals were found in mobilized sediment fractions, especially associated with the iron oxides. The metals more mobile and hence more bioavailable, have been manganese, zinc and nickel, particularly in the rainy season. Largest copper contents were found in the residual fraction of the sediment, indi...

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Section: Resultsunclassified

Distribuição geoquímica e biodisponibilidade de metais traço em sedimentos no Rio Bento Gomes, Poconé - MT, Brasil

et al. 2016

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“…A positive significant correlation between the concentration of organic matter and the mercury concentration (r = 0.80, p < 0.05) confirms the considerable share of organic matter in the binding of mercury. The positive relationships of mercury with the organic matter concentration of the sediment might be attributed to anthropogenic impacts (Farkas et al 2007). Other important factors affecting metal concentration in sediment include the content of clay fraction (Farkas et al 2007).…”

Section: Resultsmentioning

confidence: 99%

“…The positive relationships of mercury with the organic matter concentration of the sediment might be attributed to anthropogenic impacts (Farkas et al 2007). Other important factors affecting metal concentration in sediment include the content of clay fraction (Farkas et al 2007). The concentration of Hg was insignificantly correlated with sand (negatively, r = −0.40) silt and clay (positively, r = 0.45, r = 0.30, p < 0.05).…”

Section: Resultsmentioning

confidence: 99%

Mercury contamination of bottom sediments in water reservoirs of southern Poland

Koniarz

Tarnawski

Baran

et al. 2015

geol

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Abstract:The aim of this study was to assess the mercury concentration in bottom sediments, collected from eight reservoirs located in south-eastern Poland. A DMA-80 Mercury Analyser was used for the analysis of the concentration of mercury in bottom sediments. Concentration of mercury in sediments was between 0.01-0.18 mg•kg −1 . The research results show that 13 samples are above the Polish Hg background level. Only 9 samples are below the background level. Generally, the sediments belonged to class I and II (unpolluted and moderately polluted sediments). The concentration of mercury in bottom sediments follows the order: Rybnik (highest) > Bagna Rzeszowskie > Rzeszów > Ożanna > Brzóza Stadnicka > Brzóza Królewska > Głuchów > Narożniki (lowest). The low mercury content in sediments is related to absent or limited anthropogenic sources of this metal. Elevated concentrations of Hg in bottom sediments of the reservoirs in Rybnik and Bagna Rzeszowskie are related to their proximity to large agglomerations and industrial plants. Organic matter was likely to be the most important factors controlling the concentration and distribution of mercury in the studied sediments.

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“…3 for As, Cr, Hg, Ni, Pb and Zn in surficial samples of the lagoons. Reference data were separated into three major groups, to account for different anthropogenic pressures and environmental settings: industrial/urban areas (Tanner et al, 2000;Zago et al, 2001;Berg et al, 2001;Bellucci et al, 2002;Bertolotto et al, 2003;Adamo et al, 2005;Ferraro et al, 2006;McCready et al, 2006;Marmolejo-Rodriguez et al, 2007;Harikumar and Nasir, 2010;Nikolaidis et al, 2010), coastal areas (Taher and Soliman, 1999;Dauvalter and Rognerud, 2001;Zabetoglou et al, 2002;Sericano et al, 2001;Preda and Cox, 2002;Bertolotto et al, 2003;Kishe and Machida, 2003;Cuong and Obbard, 2006;Farkas et al, 2007;Nobi et al, 2007;Romano et al, 2010) and lagoons (Bellucci et al, 2002). The values measured in Vietnamese lagoons are by far among the lowest (up to one order of magnitude) of the entire set for all elements considered, being lower but comparable to other coastal systems.…”

Section: Depositional Settings and Organic Matter Originmentioning

confidence: 99%

Metals in Sediment Cores from Nine Coastal Lagoons in Central Vietnam

Shireesh¹

2012

American Journal of Environmental Sciences

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Problem statement: After being dramatically hit by war events, Vietnam is presently experiencing a huge economical and social development. However, very few data, relative to pollution levels and trends, are available for the correct management of critical areas such as coastal lagoons, where many economical activities are linked to high value environmental features. Approach: A set of sediment cores from nine coastal lagoons of central Vietnam (Lang Co, Truong Giang, An Khe, Nuoc Man, Nuoc Ngot, Thi Nai, O Loan, Thuy Trieu and Dam Nai) were sampled in 2008 and analyzed to assess metal and (Al, Cd, Cr, Cu, Fe, Hg, Li, Mn, Ni, Pb, V, U and Zn) and As levels and historical trends. Results: Concentrations are generally low, with the exception of As, which often exceeds ERL guidelines and Ni that does the same at O Loan. In some cases, concentrations-depth profiles account for recent increasing trends but surficial values are still low when compared to both international guidelines and polluted sediments all around the world. Sediment grain size seems to affect the depth distribution of a number of metals and when normalized to the content of silt and clay, values are particularly high at Dam Nai and Thi Nai, due to the very coarse composition of surficial sediments. Conclusion: Metal concentrations in lagoon sediments derive from the composition of rocks and soils in the watersheds. However, recent increasing trends need for further monitoring.

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Assessment of the environmental significance of heavy metal pollution in surficial sediments of the River Po

Cited by 260 publications

References 33 publications

Distribuição geoquímica e biodisponibilidade de metais traço em sedimentos no Rio Bento Gomes, Poconé - MT, Brasil

Distribuição geoquímica e biodisponibilidade de metais traço em sedimentos no Rio Bento Gomes, Poconé - MT, Brasil

Mercury contamination of bottom sediments in water reservoirs of southern Poland

Metals in Sediment Cores from Nine Coastal Lagoons in Central Vietnam

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