Published February 2015
| Version v1
Journal article
Effect of humic acid contact time on the diffusion of Re(VII) in GMZ bentonite
Creators
- 1. Department of Chemistry, Huzhou Teachers College, Huzhou (China)
- 2. School of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an (China)
- 3. Huzhou Environmental Protection Monitoring Center, Huzhou (China)
- 4. Northwest Institute of Nuclear Technology, Xi'an (China)
Description
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, εacc, 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 εacc 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. (authors)
Additional details
Identifiers
Publishing Information
- Journal Title
- Nuclear Science and Techniques
- Journal Volume
- 26
- Journal Issue
- S1
- Journal Page Range
- [5 p.]
- ISSN
- 1001-8042
INIS
- Country of Publication
- China
- Country of Input or Organization
- China
- INIS RN
- 49086511
- Subject category
- S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Descriptors DEI
- AGING; ANIONS; BENTONITE; DIFFUSION; HUMIC ACIDS; POROSITY; RHENIUM COMPLEXES
- Descriptors DEC
- CHARGED PARTICLES; CLAYS; COMPLEXES; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; IONS; MATERIALS; MINERALS; ORGANIC ACIDS; ORGANIC COMPOUNDS; SILICATE MINERALS; TRANSITION ELEMENT COMPLEXES
Optional Information
- Notes
- 3 figs., 2 tabs., 29 refs.; http://dx.doi.org/10.13538/j.1001-8042/nst.26.S10314