Comparison of Selenate and Sulfate Adsorption on Goethite.
Comparison of Selenate and Sulfate Adsorption on Goethite.
复制标题
针铁矿上硒酸盐和硫酸盐吸附的比较。
DOI：
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发表时间：
2001
影响因子：
9.9
通讯作者：
W. V. van Riemsdijk
中科院分区：
文献类型：
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作者：
R. Rietra;T. Hiemstra;W. V. van Riemsdijk
在多种条件下研究了硒酸盐（SeO(4)）在针铁矿上的吸附行为。将SeO(4)吸附与SO(4)结合进行了比较。根据最近对针铁矿上吸附的硒酸盐和硫酸盐的形态和配位的光谱研究，对实验结果进行了解释。光谱结果表明，在pH值大于6时，外球配合物占主导地位，而在较低pH值的主要吸附范围内，单齿内球配合物占主导地位。光谱分析的定性结果与CD-MUSIC模型对大量SeO(4)吸附数据的模拟结果非常吻合。得到的内球配合物的电荷分布与光谱测定的吸附阴离子配位一致。如果没有光谱知识，就不能从宏观吸附数据中确定外球配合物的形成。然而，CD-MUSIC方法可以非常满意地描述包括和区分两种物质的吸附数据。版权所有2001学术出版社
The adsorption behavior of selenate (SeO(4)) on goethite has been studied under a wide range of conditions. SeO(4) adsorption has been compared with the binding of SO(4). The experimental results are interpreted in view of very recent spectroscopic work on the speciation and coordination of adsorbed selenate and sulfate on goethite. The spectroscopic results suggest that at pH values above 6 outersphere complexes are dominant while in the main adsorption range at lower pH values monodentate innersphere complexes are dominant. The qualitative results from spectroscopy agree very well with the CD-MUSIC modeling of the large set of SeO(4) adsorption data. The charge distributions obtained for the innersphere complexes are in line with the spectroscopically determined coordinations of the adsorbed anions. The formation of outersphere complexes cannot be established from the macroscopic adsorption data without the spectroscopic knowledge. However, description of the adsorption data including and differentiating between both species can be done very satisfactorily with the CD-MUSIC approach. Copyright 2001 Academic Press.