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

Detalhes bibliográficos
Autor(a) principal: Bonotto, Daniel Marcos [UNESP]
Data de Publicação: 2006
Outros Autores: Vergotti, Marcelo, Da Silveira, Ene Glória
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://hdl.handle.net/11449/231797
Resumo: Gold 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.
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spelling The role of organic matter on the adsorption of mercury in sediments from Amazon lakes, BrazilAmazon lakesMadeira River basinMercuryOrganic matterPhysical weatheringSedimentsGold 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.Instituto de Geociéncias e Ciências Exatas UNESP-Universidade Estadual Paulista Júlia de Mesquita Filho, Av. 24-A no. 1515, CEP 13506-900 Rio Clara, Sao PauloDepartamento de Geografia UNIR-Fundação Universidade Federal de Rondônia, Av. Presidente Dutra no. 2965, CEP 78900-500 Porto Velho, RondoniaInstituto de Geociéncias e Ciências Exatas UNESP-Universidade Estadual Paulista Júlia de Mesquita Filho, Av. 24-A no. 1515, CEP 13506-900 Rio Clara, Sao PauloUniversidade Estadual Paulista (UNESP)UNIR-Fundação Universidade Federal de RondôniaBonotto, Daniel Marcos [UNESP]Vergotti, MarceloDa Silveira, Ene Glória2022-04-29T08:47:27Z2022-04-29T08:47:27Z2006-09-13info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject355-362IAHS-AISH Publication, n. 306, p. 355-362, 2006.0144-7815http://hdl.handle.net/11449/2317972-s2.0-33748416186Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengIAHS-AISH Publicationinfo:eu-repo/semantics/openAccess2022-04-29T08:47:27Zoai:repositorio.unesp.br:11449/231797Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:35:48.192614Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv The role of organic matter on the adsorption of mercury in sediments from Amazon lakes, Brazil
title The role of organic matter on the adsorption of mercury in sediments from Amazon lakes, Brazil
spellingShingle The role of organic matter on the adsorption of mercury in sediments from Amazon lakes, Brazil
Bonotto, Daniel Marcos [UNESP]
Amazon lakes
Madeira River basin
Mercury
Organic matter
Physical weathering
Sediments
title_short The role of organic matter on the adsorption of mercury in sediments from Amazon lakes, Brazil
title_full The role of organic matter on the adsorption of mercury in sediments from Amazon lakes, Brazil
title_fullStr The role of organic matter on the adsorption of mercury in sediments from Amazon lakes, Brazil
title_full_unstemmed The role of organic matter on the adsorption of mercury in sediments from Amazon lakes, Brazil
title_sort The role of organic matter on the adsorption of mercury in sediments from Amazon lakes, Brazil
author Bonotto, Daniel Marcos [UNESP]
author_facet Bonotto, Daniel Marcos [UNESP]
Vergotti, Marcelo
Da Silveira, Ene Glória
author_role author
author2 Vergotti, Marcelo
Da Silveira, Ene Glória
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
UNIR-Fundação Universidade Federal de Rondônia
dc.contributor.author.fl_str_mv Bonotto, Daniel Marcos [UNESP]
Vergotti, Marcelo
Da Silveira, Ene Glória
dc.subject.por.fl_str_mv Amazon lakes
Madeira River basin
Mercury
Organic matter
Physical weathering
Sediments
topic Amazon lakes
Madeira River basin
Mercury
Organic matter
Physical weathering
Sediments
description Gold 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.
publishDate 2006
dc.date.none.fl_str_mv 2006-09-13
2022-04-29T08:47:27Z
2022-04-29T08:47:27Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/conferenceObject
format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv IAHS-AISH Publication, n. 306, p. 355-362, 2006.
0144-7815
http://hdl.handle.net/11449/231797
2-s2.0-33748416186
identifier_str_mv IAHS-AISH Publication, n. 306, p. 355-362, 2006.
0144-7815
2-s2.0-33748416186
url http://hdl.handle.net/11449/231797
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv IAHS-AISH Publication
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 355-362
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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