Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (1): S10314 doi: 10.13538/j.1001-8042/nst.26.S10314

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

Effect of humic acid contact time on the diffusion of Re(VII) in GMZ bentonite

WANG Hai,1, 2 WU Tao,2 CHEN Jiang,3 FU Bao-Feng,1, 4  ZHAO Xiang-Hai,1 LUO Yong,1 ZHAO Yao-Lin,1, y and HE Chao-Hui1   

  1. 1School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
    2Department of Chemistry, Huzhou Teachers College, Huzhou 313000, China
    3Huzhou Environmental Protection Monitoring Center, Huzhou 313000, China
    4Northwest Institute of Nuclear Technology, Xi’an 710024, China
  • Contact: ZHAO Yao-Lin E-mail:zhaoyaolin@mail.xjtu.edu.cn
  • Supported by:

    National Natural Science Foundation of China (Nos.
    11275147 and 21207035) and Program for Changjiang Scholars and Innovative
    Research Team in University (No. IRT1280)

WANG Hai, WU Tao, CHEN Jiang, FU Bao-Feng, ZHAO Xiang-Hai, LUO Yong, ZHAO Yao-Lin, and HE Chao-Hui. Effect of humic acid contact time on the diffusion of Re(VII) in GMZ bentonite.Nuclear Science and Techniques, 2015, 26(1): S10314     doi: 10.13538/j.1001-8042/nst.26.S10314

Abstract:

The effect of humic acid (HA) on the diffusion of Re(VII) was investigated in compacted Gaomiaozi (GMZ)
bentonite by the through- and out- diffusion method. The effective diffusion coefficient, De, and accessible
porosity, "acc, were measured in order to evaluate the impact of humic acid on Re(VII) diffusion. The De value
was in the range of (5.2–8.3)10??12 m2/s. The diffusion of Re(VII) was enhanced in the presence of HA, and
the De value increased with the increase of ageing time, indicating that the formation of HA-Re complexes was
slow. Moreover, the "acc was in the range of (0.06– 0.16), which is less than the total porosity. It implies that the
HA-Re complexes are anions.

Key words: Diffusion coefficient, Humic acid, Re(VII), Complex, Bentonite