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

被引：22
|
作者：
de Almeida, Ronaldo [1 ,2 ]
Elias Bernardi, Jose Vicente [3 ]
Oliveira, Ronaldo Cavalcante [1 ]
de Carvalho, Dario Pires [1 ]
Manzatto, Angelo Gilberto [1 ]
de Lacerda, Luiz Drude [4 ]
Bastos, Wanderley Rodrigues [1 ]
机构：
[1] Univ Fed Rondonia, Lab Biogeoquim Ambiental Wolfgang Christian Pfeif, BR-76815800 Porto Velho, Rondonia, Brazil
[2] Univ Fed Amazonas, Inst Nat & Cultura Ciencias Agr & Ambiente, Benjamin Constant, Amazonas, Brazil
[3] Univ Brasilia, Dept Gestao Ambiental, Brasilia, DF, Brazil
[4] Univ Fed Ceara, Inst Ciencias Mar, Fortaleza, Ceara, Brazil
来源：
ACTA AMAZONICA | 2014年 / 44卷 / 01期
关键词：
organic matter; indicator kriging; Madeira river; seasonality; MADEIRA RIVER-BASIN; CONTAMINATION; RONDONIA; FISH; STORAGE; WATERS; INPUTS; SOILS;
D O I：
10.1590/S0044-59672014000100010
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
The study was conducted in Puruzinho lake (Humaita, 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.
引用
收藏
页码：99 / 105
页数：7
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