Interaction between uranium and humic acid (II): complexation, precipitation and migration behavior of U(VI) in the presence of humic substances

Jiali LIAO; Wei WEN; Bing LI; Yuanyou YANG; Dong ZHANG; Houjun KANG; Yong YANG; Jiannan JIN; Ning LIU

doi:10.13538/j.1001-8042/nst.2013.03.010

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Interaction between uranium and humic acid (II): complexation, precipitation and migration behavior of U(VI) in the presence of humic substances

NUCLEAR CHEMISTRY, RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE | Updated：2021-01-20

- Interaction between uranium and humic acid (II): complexation, precipitation and migration behavior of U(VI) in the presence of humic substances
- Nuclear Science and Techniques Vol. 24, Issue 3, Article number: 030301(2013)
- Affiliations：
  
  1.Key Laboratory of Radiation Physics and Technology, Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
  2.Institute of Nuclear Physics and Chemistry, CAEP, Mianyang 621900, China
- Author bio：
  
  Corresponding author. E-mail address: nliu720@scu.edu.cn
- Funds：
- DOI：10.13538/j.1001-8042/nst.2013.03.010
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Jiali LIAO, Wei WEN, Bing LI, et al. Interaction between uranium and humic acid (II): complexation, precipitation and migration behavior of U(VI) in the presence of humic substances. [J]. Nuclear Science and Techniques 24(3):030301(2013)
DOI：

Jiali LIAO, Wei WEN, Bing LI, et al. Interaction between uranium and humic acid (II): complexation, precipitation and migration behavior of U(VI) in the presence of humic substances. [J]. Nuclear Science and Techniques 24(3):030301(2013) DOI： 10.13538/j.1001-8042/nst.2013.03.010.

摘要

Abstract

The complexation, precipitation, and migration behavior of uranium in the presence of humic acid (HA) or fulvic acid (FA) were investigated by cation exchange, ultrafiltration and dynamic experiment, respectively. The results showed that (i) complex equilibrium between the uranium and humic substances was achieved at approximately 72 h, (ii) the coordination number varied from 1:1 to 1:2 ( U(VI) : humic acid) as pH increased from 3 to 6; and (iii) , while the complex stability constant decreased when temperature increased, but increased with pH value. We found that the precipitation of uranyl could only be observed in presence of HA, and the precipitation was influenced by conditions, such as pH, uranium concentration, temperature, and the HA concentration. The maximum precipitation proportion up to 60% could be achieved in the condition of 40 mg/L HA solution at pH 6. We further observed that the migration behavior of uranium in soil in the presence of humic acid (HA) or fulvic acid (FA) was different from that in the presence of inorganic colloid, and the effect of humic substances (HS) was limited.

关键词

Keywords

InteractionUraniumHumic acidComplexationMigrationPrecipitationSoil

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Related Institution

Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education; Institute of Nuclear Science and Technology, Sichuan University

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Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory for Fundamental Science, College of Chemistry and Molecular Engineering, Peking University

Department of Radiochemistry, China Institute of Atomic Energy

Department of Chemistry, Quaid-i-Azam University

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