Sorption and desorption of radiostrontium on powdered bentonite: Effect of pH and fulvic acid

被引：23
|
作者：
Wang, XK [1 ]
Chen, YX [1 ]
Wu, YC [1 ]
机构：
[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2004年 / 261卷 / 03期
关键词：
D O I：
10.1023/B:JRNC.0000037088.34650.0e
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The effect of pH and fulvic acid on the sorption of Sr on bentonite was investigated by using batch experiments. The sorption and desorption isotherms of Sr on bentonite were determined at room temperature, at pH 6.0+/-0.2 and in presence of 0.1M NaCl. It was found that the sorption of Sr is independent at pH<8, and then increases slightly with increasing PH. Fulvic acid increases the sorption of Sr significantly on bentonite at low PH, but decreases the sorption of Sr at pH>8. The sorption of Sr on bentonite can be described by a reversible sorption process and the sorption mechanism consists mainly of ion exchange.
引用
收藏
页码：497 / 500
页数：4
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