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Sorption of U(VI) onto a decarbonated calcareous soil

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An Erratum to this article was published on 03 April 2013

Abstract

Sorption of U(VI) from aqueous solution to decarbonated calcareous soil (DCS) was studied under ambient conditions using batch technique. Soil samples were characterized by XRD, FT-IR and SEM in detail and the effects of pH, solid-to-liquid ratio (m/V), temperature, contact time, fulvic acid (FA), CO2 and carbonates on U(VI) sorption to calcareous soil were also studied in detail using batch technique. The results from experimental techniques showed that sorption of U(VI) on DCS was significantly influenced by pH values of the aqueous phase, indicating a formation of inner-sphere complexes at solid–liquid interface, and increased with increasing temperature, suggesting the sorption process was endothermic and spontaneous. Compared to Freundlich model, sorption of U(VI) to DCS was simulated better with Langmuir model. The sorption equilibrium could be quickly achieved within 5 h, and sorption results fitted pseudo-second-order model well. The presence of FA in sorption system enhanced U(VI) sorption at low pH and reduced U(VI) sorption at high pH values. In absence of FA, the sorption of U(VI) onto DCS was an irreversible process, while the presence of FA reinforced the U(VI) desorption process reversible. The presence of CO2 decreased U(VI) sorption largely at pH >8, which might due to a weakly adsorbable formation of Ca2UO2(CO3)3 complex in aqueous phase.

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Acknowledgments

Financial support from National Natural Science Foundation of China (No.20871062, J1030932 and J0630962) and National Synchrotron Radiation Innovation Foundation of Chinese Education Ministry (2009) are acknowledged.

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Authors and Affiliations

  1. Radiochemistry Laboratory, Lanzhou University, Lanzhou, 730000, China

    Yuying Zhang, Haogui Zhao, Qiaohui Fan, Xiaobei Zheng, Ping Li, Shengping Liu & Wangsuo Wu

  2. State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, China

    Wangsuo Wu

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  1. Yuying Zhang
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  2. Haogui Zhao
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Correspondence to Qiaohui Fan or Wangsuo Wu.

Additional information

Zhang Yuying, Zhao Haogui The same contribution to this paper.

An erratum to this article can be found online at http://dx.doi.org/10.1007/s10967-013-2481-3.

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Zhang, Y., Zhao, H., Fan, Q. et al. Sorption of U(VI) onto a decarbonated calcareous soil. J Radioanal Nucl Chem 288, 395–404 (2011). https://doi.org/10.1007/s10967-010-0948-z

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