Flood pulse and spatial dynamics of mercury in sediments in Puruzinho lake, Brazilian Amazon-Reference-Cited by-同舟云学术

Flood pulse and spatial dynamics of mercury in sediments in Puruzinho lake, Brazilian Amazon

Published:2014 Issue:1 Volume:44 Page:99-105
ISSN:0044-5967
Container-title:Acta Amazonica
language:
Short-container-title:Acta Amaz.

Author:

Almeida Ronaldo de¹,Bernardi José Vicente Elias²,Oliveira Ronaldo Cavalcante³,Carvalho Dario Pires de³,Manzatto Angelo Gilberto³,Lacerda Luiz Drude de⁴,Bastos Wanderley Rodrigues³

Affiliation:

1. Universidade Federal de Rondônia, Brasil; Universidade Federal do Amazonas, Brasil

2. Universidade de Brasília, Brasil

3. Universidade Federal de Rondônia, Brasil

4. Universidade Federal do Ceará, Brasil

Abstract

The study was conducted in Puruzinho lake (Humaitá, AM) considering seasonal periods of rainy and dry in way to elucidate the flood pulse importance in the deposition, remobilization and distributions of mercury and organic matter in bottom sediments in the Madeira River Basin (Brazilian Amazon). Bottom sediments and soils samples were analyzed for total mercury and organic matter. Mercury concentrations obtained in bottom sediment were 32.20-146.40 ng g-1 and organic matter values were 3.5 - 18.0%. The main region for accumulation of mercury and organic matter was in the central and deepest lake area In the rainy season there was a greater distribution of Hg and organic matter, mainly controlled by means of income of the Madeira river water during flooding, while the predominant process in the dry season was the remobilization of total Hg due to the resuspension of bottom sediments.

Publisher

FapUNIFESP (SciELO)

Subject

General Agricultural and Biological Sciences

Link

http://www.scielo.br/pdf/aa/v44n1/10.pdf

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