EXAFS Studies about the Sorption of Cadmium Ions on Montmorillonite
EXAFS Studies about the Sorption of Cadmium Ions on Montmorillonite
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DOI：
10.1246/cl.2006.224
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发表时间：
2006-01
影响因子：
1.6
通讯作者：
R. Takamatsu;K. Asakura;W. Chun;T. Miyazaki;M. Nakano
中科院分区：
文献类型：
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作者：
R. Takamatsu;K. Asakura;W. Chun;T. Miyazaki;M. Nakano
利用扩展X射线吸收精细结构（EXAFS）研究了不同pH值条件下蒙脱石吸附镉（Cd）的局域结构。我们发现了两种吸附类型，外层复合物和表面沉淀。在较低的pH值下形成的外层络合物结构与水溶液中的Cd2+相同，而在较高的pH值下形成的表面沉淀物结构为单层Cd5（OH）8（NO3）2（H2O）2结构.
We investigated local structures around cadmium (Cd) sorbed on montmorillonite at various pH values by EXAFS (extend X-ray absorption fine structure). We found two sorption types, an outer-sphere complex and a surface precipitate. The outer-sphere complex was mainly formed at a lower pH which had an identical structure to aqueous Cd 2+ , while the surface precipitate was found at high pH which had a one-layer Cd 5 (OH) 8 (N03)2(H20)2-like structure.