Characterization of MX-80 bentonite and its sorption of radionickel in the presence of humic and fulvic acids |
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| Authors: | Jun Hu Di Xu Lei Chen Xiangke Wang |
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| Institution: | (1) School of Nuclear Science and Engineering, North China Electric Power University, 100080 Beijing, P.R. China;(2) Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, 230031 Hefei, P.R. China;(3) School of Chemical Engineering, Shandong University of Technology, 255049 Zibo, P.R. China |
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| Abstract: | MX-80 bentonite is considered as one of the best backfill materials for high-level radioactive nuclear waste. Herein, the
bentonite is characterized by using XRD and FTIR techniques. Sorption of radionickel to MX-80 bentonite in the presence/absence
of humic acid (HA) or fulvic acid (FA) as a function of pH is investigated. The results indicate that the presence of HA or
FA decreases the sorption of Ni2+ obviously. The different experimental processes do not affect the sorption of nickel to FA/HA bound bentonite. The sorption
of Ni2+ on FA/HA-bound bentonite decreases with the increasing FA/HA content in the systems. The mechanism of nickel sorption is
also discussed in detail. |
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