期刊：
Water, Air, and Soil Pollution: Focus,2007年7(1-3):151-161 ISSN：1567-7230
通讯作者：
Anne Probst
作者机构：
[Bohan Liao] International College, Central South University of Forestry and Technology, Changsha, China;[Zhaohui Guo] Department of Environmental Engineering, Central South University, Changsha, China;[Qingru Zeng] College of Resources and Environment, Hunan Agricultural University, Changsha, China;[Anne Probst; Jean-Luc Probst] ECOLAB, CNRS-INPT-Université Paul Sabatier, Castanet Tolosan, Cedex, France
通讯机构：
[Anne Probst] E;ECOLAB, CNRS-INPT-Université Paul Sabatier, Castanet Tolosan, Cedex, France
摘要：
Leaching experiments of rebuilt soil columns with two simulated acid rain solutions (pH 4.6–3.8) were conducted for two natural soils and two artificial contaminated soils from Hunan, south-central China, to study effects of acid rain on competitive releases of soil Cd, Cu, and Zn. Distilled water was used in comparison. The results showed that the total releases were Zn>Cu>Cd for the natural soils and Cd>Zn≫Cu for the contaminated soils, which reflected sensitivity of these metals to acid rain. Leached with different acid rain, about 26–76% of external Cd and 11–68% external Zn were released, but more than 99% of external Cu was adsorbed by the soils, and therefore Cu had a different sorption and desorption pattern from Cd and Zn. Metal releases were obviously correlated with releases of TOC in the leachates, which could be described as an exponential equation. Compared with the natural soils, acid rain not only led to changes in total metal contents, but also in metal fraction distributions in the contaminated soils. More acidified soils had a lower sorption capacity to metals, mostly related to soil properties such as pH, organic matter, soil particles, adsorbed SO4
2−, exchangeable Al3+ and H+, and contents of Fe2O3 and Al2O3.
