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Effects of nitrate, fulvate, phosphate, phthalate, salicylate and catechol on the sorption of uranyl onto SiO2: a comparative study

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Abstract

We have performed a large number of batch sorption experiments of uranyl onto SiO2 and examined the effects of nitrate or ionic strength, phosphate, fulvic acid(FA), phthalic acid (PH), salicylic acid (SA), and catechol (CA) on the uranyl sorption onto SiO2. Three sorption edges and three sorption isotherms at ionic strengths 0.05, 0.1, and 0.5 mol/L KNO3 were used to investigate the effect of ionic strength or nitrate on the sorption and the Langmuir, Freundlich, and Dubinin-Radushkevich models are used to simulate the sorption isotherms, respectively. Five sorption edges in the presence of phosphate, FA, PH, SA, and CA were compared with that in the absence of complexing ligand. The results suggest that the effect of complexation of uranyl with nitrate on the uranyl sorption can be negligible and the sorption can be described Freundlich and D-R model very well. The positive effect of phosphate on the uranyl sorption was found, though the extent of effect was decreased with increasing pH. The positive effect and the negative effect of FA on the uranyl sorption were found at low pH and high pH ranges, respectively. The sorption edge of uranyl sorption remained unaffected in the presence of PH in the pH 2–10. In the presence of SA, the no effect and the negative effect on the uranyl sorption were, respectively, found at low pH and high pH ranges. The negative effect of CA on the uranyl sorption was found in the pH 2–10.

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Acknowledgments

This project was supported by the National Natural Science Foundation of China (Grant nos. 20971061 and 20871062) and National Natural Science for Teaching Personnel Foundation of China (Grant no. J1030962) and the Fundamental Research Funds for the Central Universities (lzujbky-2010-30).

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Authors and Affiliations

  1. Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, People’s Republic of China

    Zhang Hongxia, Wen Chuanxi, Tao Zuyi & Wu Wangsuo

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  1. Zhang Hongxia
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  2. Wen Chuanxi
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  3. Tao Zuyi
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  4. Wu Wangsuo
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Correspondence to Zhang Hongxia or Wu Wangsuo.

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Hongxia, Z., Chuanxi, W., Zuyi, T. et al. Effects of nitrate, fulvate, phosphate, phthalate, salicylate and catechol on the sorption of uranyl onto SiO2: a comparative study. J Radioanal Nucl Chem 287, 13–20 (2011). https://doi.org/10.1007/s10967-010-0859-z

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  • DOI: https://doi.org/10.1007/s10967-010-0859-z

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