The role of organic matter on the adsorption of mercury in sediments from Amazon lakes, Brazil

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUNIR-Fundação Universidade Federal de Rondônia-
Autor(es): dc.creatorBonotto, Daniel Marcos-
Autor(es): dc.creatorVergotti, Marcelo-
Autor(es): dc.creatorDa Silveira, Ene Glória-
Data de aceite: dc.date.accessioned2025-08-21T15:55:25Z-
Data de disponibilização: dc.date.available2025-08-21T15:55:25Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2006-09-13-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/231797-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/231797-
Descrição: dc.descriptionGold has been exploited intensively in the Brazilian Amazon during the past 20 years, and the elemental mercury (Hg) used in amalgamating the gold has caused abnormal Hg concentrations in waterways. Since 1986 particular attention has been given to the Madeira River because it is the largest tributary of the Amazon River and gold mining was officially allowed on a 350-km sector of the river. In this paper, samples of sediments from nine lakes located in the Madeira River basin, Rondônia State, Brazil, were analysed for mercury and organic matter. The average Hg content ranged between 33 and 157 ppb, which is about 8-40 times higher than the average value corresponding to 4.4 ppb for rocks occurring in the area (regional background). Significant correlation was found between the Hg content and organic matter in the sediments, indicating its importance on the retention of this heavy metal.-
Descrição: dc.descriptionInstituto de Geociéncias e Ciências Exatas UNESP-Universidade Estadual Paulista Júlia de Mesquita Filho, Av. 24-A no. 1515, CEP 13506-900 Rio Clara, Sao Paulo-
Descrição: dc.descriptionDepartamento de Geografia UNIR-Fundação Universidade Federal de Rondônia, Av. Presidente Dutra no. 2965, CEP 78900-500 Porto Velho, Rondonia-
Descrição: dc.descriptionInstituto de Geociéncias e Ciências Exatas UNESP-Universidade Estadual Paulista Júlia de Mesquita Filho, Av. 24-A no. 1515, CEP 13506-900 Rio Clara, Sao Paulo-
Formato: dc.format355-362-
Idioma: dc.languageen-
Relação: dc.relationIAHS-AISH Publication-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAmazon lakes-
Palavras-chave: dc.subjectMadeira River basin-
Palavras-chave: dc.subjectMercury-
Palavras-chave: dc.subjectOrganic matter-
Palavras-chave: dc.subjectPhysical weathering-
Palavras-chave: dc.subjectSediments-
Título: dc.titleThe role of organic matter on the adsorption of mercury in sediments from Amazon lakes, Brazil-
Tipo de arquivo: dc.typeaula digital-
Aparece nas coleções:Repositório Institucional - Unesp

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