Abstract
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.
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Financial support from National Natural Science Foundation of China (21375148, 21577032) and the Fundamental Research Funds for the Central Universities (2016MS02) are acknowledged.
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Wang, J., Chen, Z., Chen, W. et al. Effect of pH, ionic strength, humic substances and temperature on the sorption of Th(IV) onto NKF-6 zeolite. J Radioanal Nucl Chem 310, 597–609 (2016). https://doi.org/10.1007/s10967-016-4868-4
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DOI: https://doi.org/10.1007/s10967-016-4868-4