Miretzky Patricia, Bisinoti Márcia Cristina, Jardim Wilson F
Centro de Estudios Transdiciplinarios del Agua, Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Chorroarín 280, Buenos Aires (1427), Argentina.
Chemosphere. 2005 Sep;60(11):1583-9. doi: 10.1016/j.chemosphere.2005.02.050. Epub 2005 Apr 12.
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 3.8 mg Hg g(-1) soil. 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.
通过在饱和条件和受控金属负载下的柱实验，研究了四种不同类型的来自亚马逊A层土壤对汞（II）的吸附情况。土壤中较高的有机质含量导致对汞（II）的吸附量更高，高达3.8毫克汞/克土壤。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），这表明这些表土样品中汞的吸附主要受有机质含量控制。为了更好地理解金属淋溶机制，使用汞（II）饱和的土壤进行了使用内格罗河（亚马逊）河水的解吸实验。土壤释放的汞（II）量约为饱和时吸附的总汞量的30%，这表明内格罗河流域集水区土壤中的汞吸附不是一个可逆过程。
