Effect of pH, ionic strength, humic substances and temperature on the sorption of Th(IV) onto NKF-6 zeolite
Effect of pH, ionic strength, humic substances and temperature on the sorption of Th(IV) onto NKF-6 zeolite
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DOI：
10.1007/s10967-016-4868-4
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发表时间：
2016-05
影响因子：
1.6
通讯作者：
Jian Wang;Zhongshan Chen;Wanying Chen;Yinshi Li;Y. Wu;Jun Hu;A. Alsaedi;N. S. Alharbi;
中科院分区：
文献类型：
--
作者：
Jian Wang;Zhongshan Chen;Wanying Chen;Yinshi Li;Y. Wu;Jun Hu;A. Alsaedi;N. S. Alharbi;
采用间歇实验研究了NKF-6分子筛对水溶液中Th（IV）的吸附行为。当pH < 6.0时，Th（IV）在NKF-6沸石上的吸附与pH和离子强度密切相关，而当pH > 6.0时，吸附与离子强度无关。在低pH值下，Th（IV）在NKF-6沸石上的吸附主要以离子交换或外球表面络合为主，而在高pH值下，吸附主要以内球表面络合为主。热力学数据表明，Th（IV）在NKF-6分子筛上的吸附是一个自发的吸热过程。结果表明，NKF-6沸石是一种适合于从大量实际废水中富集Th（IV）的吸附剂。
Sorption of Th(IV) from aqueous solution to NKF-6 zeolite as a function of experimental conditions were investigated using batch experiments. The sorption of Th(IV) on NKF-6 zeolite was strongly dependent on pH and ionic strength at pH < 6.0, and independent of ionic strength at pH > 6.0. The sorption of Th(IV) on NKF-6 zeolite was mainly dominated by ion exchange or outer-sphere surface complexation at low pH, while by inner-sphere surface complexation at high pH values. The thermodynamic data suggested that the sorption of Th(IV) on NKF-6 zeolite was an spontaneous and endothermic process. The results show that NKF-6 zeolite is a suitable adsorbent for Th(IV) enrichment from large amount of actual effluent.