Sorption of mercury (II) in Amazon soils from column studies.
Sorption of mercury (II) in Amazon soils from column studies.
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DOI：
10.1016/j.chemosphere.2005.02.050
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发表时间：
2005-09
期刊：
影响因子：
8.8
通讯作者：
P. Miretzky;M. Bisinoti;W. Jardim
中科院分区：
文献类型：
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作者：
P. Miretzky;M. Bisinoti;W. Jardim
通过饱和条件和受控金属负载下的柱实验研究了 A 地平线上四种不同类型的亚马逊土壤对汞 (II) 的吸附。土壤中较高的有机质含量导致较高的 Hg (II) 吸附量，达到高达 3.8mgHgg−1soil 的值。土壤柱上吸附的汞量 (Q) 与土壤粘土含量的相关性非常差 (r2=0.2527)，表明这些表土样品中的汞吸附主要受有机质含量的影响。为了更好地了解金属浸出机制，使用内格罗河（亚马逊）水域和饱和汞 (II) 的土壤进行了解吸实验。饱和时土壤释放的汞 (II) 量约为吸附汞总量的 30%，这表明内格罗河流域流域土壤中的汞吸附不是一个可逆过程。
The sorption of Hg (II) onto four different types of Amazon soils from the A-horizon was investigated by means of column experiments under saturation conditions and controlled metal load. Higher organic matter contents in the soil resulted in higher Hg (II) adsorptions, reaching values as high as 3.8mgHgg−1soil. The amount of mercury adsorbed on a soil column (Q) shows a very poor correlation with soil clay content (r2=0.2527), indicating that Hg sorption in these topsoil samples is chiefly governed by the organic matter content. Desorption experiments using Negro River (Amazon) waters were conducted using soil saturated with Hg (II) in order to better understand the metal leaching mechanism. The amount of Hg (II) released from soils was around 30% of the total sorbed mercury upon saturation, suggesting that mercury sorption in the soils present in the catchment area of the Negro River basin is not a reversible process.