郭广勇;袁涛;汪洁;王文华;

• 1:上海师范大学生命与环境科学学院
• 2:上海交通大学环境科学与工程学院

摘要(Abstract)：

利用X射线吸收精细结构谱(XAFS)对老化过程中土壤中铜的分子形态进行初步表征。以硫酸铜、氧化铜和硫化铜的X射线吸收扩展边结构(EXAFS)谱为参比,对土壤样品中Cu的EXAFS谱进行拟合,得到不同老化阶段与参比物质相对应的结合态Cu的百分含量,并与连续提取法表征进行比较。XAFS分析结果表明,老化阶段土壤样品中铜的主要结合形态是CuSO_4,同时还有部分CuS,基本不含有CuO。随着时间的推移,土壤中CuSO_4百分含量呈现出下降的趋势,CuS百分含量呈现出上升的趋势。这与连续提取法研究结果中其可交换态的百分比下降,残渣态上升的趋势相似。

关键词(KeyWords)： 老化过程;铜形态;土壤;X射线吸收光谱(XAFS)

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 郭广勇;袁涛;汪洁;王文华;

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