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Effect of humic acid on the diffusion of ReO4 − in GMZ bentonite

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Abstract

Humic acid is ubiquitous in soils and water. It affects the migration of radionuclides by complexation or redox reactions. The effect of humic acid on the diffusion of ReO4 − in GMZ bentonite was investigated at dry density from 1,300 to 1,800 kg/m3. The effective diffusion coefficient De and rock capacity factor α were measured by through-diffusion method. The De decreased from 5.5 to 0.59 × 10−11 m2/s and α decreased from 0.2 to 0.12 with the dry density increasing from 1,300 to 1,800 kg/m3. The retardation factor R in GMZ bentonite at three dry densities was obtained, which were less than one. Archie’s law was used to describe the relationship between accessible porosity εacc and De. An empirical parameter n (n = 2.2 ± 0.2) was obtained for Re diffusion in GMZ bentonite in the presence of humic acid.

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Acknowledgments

This research is receiving financially support from the National Natural Science Foundation of China (Grant No. 11275147 and Grant No. 21207035).

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Authors and Affiliations

  1. School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an, 710049, People’s Republic of China

    Hai Wang, Baofeng Fu, Yong Luo, Yaolin Zhao & Chaohui He

  2. Department of Chemistry, Huzhou Teachers College, Huzhou, 313000, People’s Republic of China

    Hai Wang & Tao Wu

  3. Huzhou Environmental Protection Monitoring Center, Huzhou, 313000, People’s Republic of China

    Jiang Chen

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  1. Hai Wang
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  2. Tao Wu
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  3. Jiang Chen
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  4. Baofeng Fu
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  6. Yaolin Zhao
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  7. Chaohui He
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Correspondence to Yaolin Zhao.

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Wang, H., Wu, T., Chen, J. et al. Effect of humic acid on the diffusion of ReO4 − in GMZ bentonite. J Radioanal Nucl Chem 303, 187–191 (2015). https://doi.org/10.1007/s10967-014-3403-8

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  • DOI: https://doi.org/10.1007/s10967-014-3403-8

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