Sorption of Am(Ⅲ) on Na-bentonite:Effect of pH,ionic strength,temperature and humic acid

被引：2
|
作者：
Tao Yu~(a
机构：
来源：
ChineseChemicalLetters | 2012年 / 23卷 / 10期
基金：
美国国家科学基金会;
关键词：
Sorption; Am(Ⅲ); Bentonite; Humic acid;
D O I：
暂无
中图分类号：
O647.32 [化学吸附、物理吸附、等温吸附];
学科分类号：
070304 ; 081704 ;
摘要：
Sorption of Am（Ⅲ） on Na-bentonite as a function of contact time,pH,ionic strength,humic acid（HA） and temperature was investigated under ambient conditions.The results showed that the sorption was strongly dependent on pH and ionic strength. Am（Ⅲ） sorption can be described well by pseudo-second-order model.The presence of HA takes a positive effect at low pH;but a negative influence under high pH range.Enthalpy,entropy and Gibbs free energy（i.e.,△H;,△S;and△G;） calculated from sorption isotherms suggested that sorption process of Am（Ⅲ） was spontaneous and endothermic.
引用
收藏
页码：1189 / 1192
页数：4
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