Soil migration of antimony and arsenic facilitated by colloids in lysimeter studies

文献类型： 外文期刊

第一作者： Zhao, Long

作者： Zhao, Long;Sun, Zaijin;Ma, Jin;Hou, Hong;Shangguan, Yuxian;Yao, Na

作者机构：

关键词： Organic colloid; Migration; Leachate; Metal oxide; Heavy metal

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2020 年 728 卷

页码：

收录情况： SCI

摘要： The migration behaviors of antimony (Sb) and arsenic (As) and its influence factors have not been well understood among the different soils. In this study, we used lysimeter experiments to investigate the migration behavior of Sb compared with that of As in four representative soil materials from China. All the experiments processes and management measures were conducted to simulate the actual natural environmental conditions. Results indicated that after two years of leaching, the concentrations of Sb and As at the soil surface had decreased, whereas they increased in the deep soil profiles. In the polluted soil materials, 28.5%-39.2% of Sb and 0.4%-1.3% of As existed in the stable fraction, respectively. As and Sb levels were higher in the surface soil layer, and decreased with the soil depth in the different soil profiles. In soil leachate, Sb was mainly found in particle sizes smaller than 0.45 mu m with the organic colloids, which had a peak in the spring and summer. On contrast, As was found in particle sizes larger than 0.45 mu m with the inorganic colloids such as iron (Fe) and aluminum (Al) oxides. Pearson correlation results showed that the concentrations of Sb in the soil leaching solution and 0.45-mu m-filltered solution were all positively correlated with Fe and Al. The results confirmed that Sb was combined with Fe and Al in the solution, and As posed a greater environmental risk than Sb during the leaching process. This study will help us to describe and predict As and Sb pollution in the soil environment, providing a basis for managing soil contaminated by these pollutants.

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[1]Soil migration of antimony and arsenic facilitated by colloids in lysimeter studies. Zhao, Long,Sun, Zaijin,Ma, Jin,Hou, Hong,Shangguan, Yuxian,Yao, Na. 2020

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