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Radiotracer estimates of benthic activity effects on trace metal diffusion into mangrove sediments.
Suzuki, K N; Machado, E C; Machado, W; Bellido, L F; Bellido, A V B; Lopes, R T.
Afiliação
  • Suzuki KN; Laboratório de Instrumentação Nuclear, COPPE, Universidade Federal do Rio de Janeiro, RJ, Brazil. norisuzuki6@yahoo.com.br
Mar Environ Res ; 83: 96-100, 2013 Feb.
Article em En | MEDLINE | ID: mdl-23174087
Potential influences of the whole benthic organisms' activity (i.e., coupled faunal and microbial effects) on (58)Co, (51)Cr and (65)Zn diffusion into surface mangrove sediment layers (0-6 cm depth) were evaluated in 36 h experiments. Benthic activity indices (BAI) were proposed, calculated as the relative percent difference between untreated sediments and formaldehyde-treated sediments data in relation to untreated sediments data. Benthic activity was estimated as responsible for 32%-44% of total inventories within sediments, being the chromate anion spiked the less affected radiotracer, while (65)Zn was the most sensitive. Benthic activity was quantitatively evidenced as a control on trace metal diffusion into the sediments, contributing to determine the sediment role as a metal sink. This influence can also affect metal potential bioavailability, considering that recently diffused metals can be more readily available to biological uptake.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Traçadores Radioativos / Poluentes Químicos da Água / Monitoramento Ambiental / Sedimentos Geológicos / Áreas Alagadas / Metais Limite: Animals Idioma: En Revista: Mar Environ Res Assunto da revista: BIOLOGIA / SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2013 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Traçadores Radioativos / Poluentes Químicos da Água / Monitoramento Ambiental / Sedimentos Geológicos / Áreas Alagadas / Metais Limite: Animals Idioma: En Revista: Mar Environ Res Assunto da revista: BIOLOGIA / SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2013 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido