Heavy metals in tributaries of Pampulha Reservoir, Minas Gerais

Rietzler, Arnola C.; Fonseca, Ana Lúcia; Lopes, G. P.

doi:10.1590/s1519-69842001000300004

Cited by 34 publications

(16 citation statements)

References 5 publications

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“…A study of Rietzler et al (2001) showed extremely high heavy metal pollution in these both streams. Potential sources for this contamination are iron and steel industries (Fe, Cr, Ni, Co), solvent and paint industries (Ni, Cr, Pb), and the land-fill dump of Belo Horizonte (Fe, Mn, Ni, Cu, Cd, Pb, Zn).…”

Section: Article In Pressmentioning

confidence: 93%

Anthropogenic influence on the degradation of an urban lake – The Pampulha reservoir in Belo Horizonte, Minas Gerais, Brazil

et al. 2010

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a b s t r a c tThe artificial reservoir Lagoa da Pampulha in central Brazil has been increasingly affected by sediment deposition and pollution from urban and industrial sources. This study investigates water chemistry and heavy metal concentrations and their fractionation in the lake sediment using ICP-OES, ICP-MS, and XRD analyses. Fractionation analysis was done by sequential extraction under inert gas as well as after oxidation. The lake exhibits a permanent stratification with an oxygen-free hypolimnion below 2 m depth. Nutrient concentrations are enriched for phosphorous components (SRP, PO 4 ). In the sediment it was not possible to detect oxygen. Carbon, sulfur, and most of the analyzed heavy metals are enriched in the top sediment layer with a pronounced downward decrease, indicating the presence of an anthropogenic influence. Statistical analysis, including correlations and a Principal Component Analysis (PCA) of depth-related total concentration data, helps to distinguish presumably anthropogenic heavy metals from geogenic components. Some samples with high element concentrations in the sediment also show elevated concentrations in their pore water. Analyses of element distribution between sediment and pore water suggest a strong bonding of heavy metals to the anoxic sediment. The trend towards elevated solubility in the pore water of oxidized samples is clear for most of the analyzed elements. Fractionation analysis reveals characteristic associations of selected elements to specific mineral bonding forms. In addition, it indicates that the behavior of heavy metals in the sediment is strongly influenced by organic substances. These substances provide buffering against oxidation, acidification, and metal release. The high nutrient loading causes reducing conditions in the lake sediment. These conditions trigger the accumulation of sediments rich in S 2 À , which stabilizes the fixation of heavy elements. In the future, care must be taken to reduce the supply of contaminants and to prevent the release of heavy metals from sediments dredged for remediation purposes.

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Section: Article In Pressmentioning

confidence: 93%

Anthropogenic influence on the degradation of an urban lake – The Pampulha reservoir in Belo Horizonte, Minas Gerais, Brazil

et al. 2010

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“…Para as concentrações de Cu e Pb, nenhuma tendência temporal foi observada nas duas matrizes analisadas. Alguns trabalhos têm reportado tendência de aumento nas concentrações de metais em água em períodos chuvosos, como o estudo de Rietzler et al (2001) em um afluente do reservatório da Pampulha em Belo Horizonte (MG), região intensamente ocupada com núcleo urbano e com indústrias de ferro e aço, solventes e tintas e construção civil.…”

Section: Resultsunclassified

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2016

Rev. ambiente água

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1022-1022Ambiente & Água -An Interdisciplinary Journal of Applied Science ISSN 1980-993X -doi:10.4136/1980 The following list (Table 1) includes the names and affiliations of all reviewers that evaluated the submissions processed for Volume 11, 2016 of Revista Ambiente & Água, including manuscripts that were accepted and published in one of the four annual issues and also manuscripts submitted and rejected in 2016 up to October 10, 2016. It may therefore include the names of reviewers that completed their evaluations between September, 2015 and October, 2016. We are deeply indebted to all of them that voluntarily and anonymously spent their precious time to support the journal, and contributed immensely to the quality of the published articles. We gratefully acknowledge their professional work and outstanding product. Note: 1) Some of these reviewers evaluated more than one manuscript; 2) This list includes reviewers that evaluated submissions that were not accepted for publication, in addition to the ones published in 2016.As seen in Table 2, 21 reviewers are from international institutions. This is an indication that the journal is gaining international acceptance and inclusion. ABSTRACTThis paper discusses the reverse logistics of empty agrochemical containers, the partners involved, and it focuses on the participation of the Agricultural Defense Agency of the São Paulo state government in reducing the risk of water and soil contamination in order to preserve these resources for future generations. O sistema de logística reversa e o papel da fiscalização governamental para a preservação do solo e da água: o caso das embalagens vazias de defensivos agrícolas RESUMO Este trabalho tem por objetivo demonstrar como a logística reversa das embalagens vazias de agrotóxicos funciona, quais são os parceiros envolvidos, focando na participação da Defesa Agropecuária do governo do Estado de São Paulo, na redução dos riscos de contaminação de água e solo, com o objetivo de preservar estes recursos para as gerações futuras.Palavras-chave: agricultura, agrotóxico, contaminação ambiental. DISCUSSIONConsidered a regulatory landmark in 1989, a Brazilian federal law first demonstrated the country's concern with the handling and disposal of pesticide containers. Previously, most of the focus was on pesticide efficiency and most of the containers were made of glass, not of plastic as they are today. The environment was still not considered an important concern, and even today Brazil is the largest consumer of pesticides worldwide. The correct handling and disposal of pesticide containers is therefore of primary importance in public policy. Brazil's Federal Laws 7802 (Brazil, 1989), 9974 (Brazil, 2000 and Decree 4074 (Brazil, 2002) regulate the obligation to return empty pesticide containers to retailers or producers. In 2010, reverse logistics was defined by Federal Law 12305 (Brazil, 2010), which created the National Policy on Solid Waste. According to this law, reverse logistics can be understood as a set of actions...

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“…This causes the carrying of large quantities of particles and pollutants into rivers and streams, characterising the contribution of diffuse sources. Rietzler et al (2001) related the elevated concentrations of metals recorded during the wet season to the landfill dump of the city and rain drainage. In addition, the riparian absence in streams is an aggravating factor for diffuse pollutants, as this vegetation is the main barrier to the uptake of leaching into water bodies.…”

Section: Metals In Surface Water and Sedimentmentioning

confidence: 99%

Seasonal study of contamination by metal in water and sediment in a sub-basin in the southeast of Brazil

et al. 2011

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The spatial and temporal occurrence of heavy metals (Al, Cd, Pb, Zn, Cr, Co, Cu, Fe, Mn and Ni) in water and sediment samples was investigated in a sub-basin in the southeast of Brazil (São Carlos, SP). All samples were analysed using the USEPA adapted metal method and processed in an atomic absorption spectrophotometer. The discriminant analysis demonstrated that there are significant seasonal differences of metal distribution in the water data, but there are no differences to sediment. The basin studied has high levels of contamination by toxic metals in superficial water and sediment. The superficial water, in the rainy season, presented high levels of Cr, Ni, Pb and Cd, while in the dry season it presented high levels of Zn and Ni. The Principal Component Analysis demonstrated that the season has a huge influence on the levels, types and distribution of metals found in water. The source of contamination was probably diffuse, due to products such as batteries and fluorescent lamps, whose dump discharge can contaminate the bodies of water in the region in the rainy season. Due to fires from the harvest of sugar cane, high levels of Zn were found into the environment, in the dry season.Keywords: heavy metal, water pollution, sediment pollution. Estudo sazonal da contaminação por metais na água e sedimentos em uma sub-bacia na região sudeste do Brasil ResumoA ocorrência espacial e temporal de metais pesados (Al, Cd, Pb, Zn, Cr, Co, Cu, Fe, Mn e Ni) nas amostras de água e sedimento foram investigadas em uma sub-bacia do sudeste do Brasil (São Carlos, SP). Todas as amostras foram analisadas através do método de metal USEPA, adaptado e processado por espectrofotômetro de absorção atômica. A análise de Discriminante demonstrou que existem diferenças sazonais significantes na distribuição dos metais na água, mas não existem diferenças para o sedimento. A água superficial, na estação chuvosa, apresentou altos índices de Cr, Ni, Pb e Cd, enquanto na estação seca apresentou altos índices de Zn e Ni. A Análise de Componente Principal demonstrou que as estações do ano têm uma enorme influência no nível, no tipo e na distribuição dos metais encontrados na água. A fonte de contaminação foi provavelmente difusa devido a produtos como baterias e lâmpadas fluorescentes, cuja descarga nos lixões pode contaminar os corpos de água da região na estação chuvosa. Devido a queimadas provenientes da colheita de cana-de-açúcar, altos níveis de Zn foram encontrados no ambiente na estação de seca.Palavras-chave: metal pesado, poluição da água, poluição do sedimento.

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Heavy metals in tributaries of Pampulha Reservoir, Minas Gerais

Cited by 34 publications

References 5 publications

Anthropogenic influence on the degradation of an urban lake – The Pampulha reservoir in Belo Horizonte, Minas Gerais, Brazil

Anthropogenic influence on the degradation of an urban lake – The Pampulha reservoir in Belo Horizonte, Minas Gerais, Brazil

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Seasonal study of contamination by metal in water and sediment in a sub-basin in the southeast of Brazil

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