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

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Abstract

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.

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Authors and Affiliations

  1. Furschungszentrum Karlsruhe, Institut für Nukleare Entsorgung, Postfach 3640, D-76021, Karlsruhe, Germany

    Xiangke Wang

  2. Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui, 230031, P.R. China

    Yixue Chen & Yican Wu

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  1. Xiangke Wang
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  2. Yixue Chen
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  3. Yican Wu
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Wang, X., Chen, Y. & Wu, Y. Sorption and desorption of radiostrontium on powdered bentonite: Effect of pH and fulvic acid. Journal of Radioanalytical and Nuclear Chemistry 261, 497–500 (2004). https://doi.org/10.1023/B:JRNC.0000037088.34650.0e

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  • DOI: https://doi.org/10.1023/B:JRNC.0000037088.34650.0e

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