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Mercury dilution by autochthonous organic matter in a fertilized mangrove wetland.
Machado, Wilson; Sanders, Christian J; Santos, Isaac R; Sanders, Luciana M; Silva-Filho, Emmanoel V; Luiz-Silva, Wanilson.
Afiliação
  • Machado W; Departamento de Geoquímica, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, 24020-150, Brazil. Electronic address: wmachado@geoq.uff.br.
  • Sanders CJ; National Marine Science Centre, School of Environment, Science and Engineering, Southern Cross University, P.O. Box 157, Coffs Harbour, NSW, 2540, Australia.
  • Santos IR; National Marine Science Centre, School of Environment, Science and Engineering, Southern Cross University, P.O. Box 157, Coffs Harbour, NSW, 2540, Australia.
  • Sanders LM; Southern Cross Geoscience, School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW, 2480, Australia.
  • Silva-Filho EV; Departamento de Geoquímica, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, 24020-150, Brazil.
  • Luiz-Silva W; Instituto de Geociências, Universidade Estadual de Campinas, Campinas, SP, 13083-970, Brazil.
Environ Pollut ; 213: 30-35, 2016 Jun.
Article em En | MEDLINE | ID: mdl-26874872
A dated sediment core from a highly-fertilized mangrove wetland located in Cubatão (SE Brazil) presented a negative correlation between mercury (Hg) and organic carbon contents. This is an unusual result for a metal with well-known affinity to organic matter. A dilution of Hg concentrations by autochthonous organic matter explained this observation, as revealed by carbon stable isotopes signatures (δ(13)C). Mercury dilution by the predominant mangrove-derived organic matter counterbalanced the positive influences of algal-derived organic matter and clay contents on Hg levels, suggesting that deleterious effects of Hg may be attenuated. Considering the current paradigm on the positive effect of organic matter on Hg concentrations in coastal sediments and the expected increase in mangrove organic matter burial due to natural and anthropogenic stimulations of primary production, predictions on the influences of organic matter on Hg accumulation in mangrove wetlands deserve caution.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Sedimentos Geológicos / Rhizophoraceae / Áreas Alagadas / Mercúrio Tipo de estudo: Prognostic_studies País/Região como assunto: America do sul / Brasil Idioma: En Revista: Environ Pollut Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2016 Tipo de documento: Article País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Sedimentos Geológicos / Rhizophoraceae / Áreas Alagadas / Mercúrio Tipo de estudo: Prognostic_studies País/Região como assunto: America do sul / Brasil Idioma: En Revista: Environ Pollut Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2016 Tipo de documento: Article País de publicação: Reino Unido