Sorptive Removal of Cesium-137 and Strontium-90 from Water by Unconventional Sorbenta. I. Usage of Bauxite Wastes (Red Muds).

• APAK Resat

  Department of Chemistry, Faculty of Engineering, Istanbul University

• ATUN Gulten

  Department of Chemistry, Faculty of Engineering, Istanbul University

• GUCLU Kubilay

  Department of Chemistry, Faculty of Engineering, Istanbul University

• TUTEM Esma

  Department of Chemistry, Faculty of Engineering, Istanbul University

• KESKIN Gunes

  Department of Chemistry, Faculty of Engineering, Istanbul University

Bibliographic Information

Other Title

• I. Usage of Bauxite Wastes (Red Muds)

Abstract

Bauxite wastes of alumina manufacture, i.e., red muds, have been tested for radiocesium and strontium removal from water. The red muds were water-washed, acid-, and heat-treated before usage to produce hydrous oxide like sorbents. Surface treatment of the sorbent was benefical for ¹³⁷Cs uptake, while heat-treatment was detrimental to the -SOH surface sites responsible for high ⁹⁰Sr affinity. Fractionation of the sorbent with respect to apparent grain size did not produce significant differences in the sorption efficiency. The distribution coefficients vs. equilibrium activity in solution showed a maximum with Cs, and a gradual decrease trend with Sr. The solution activity vs. adsorption data were fitted to B. E. T. (essentially types IV-V) isotherms for Cs and B. E. T.-Langmuir isotherms for Sr. Desorption, temperature-, pH-, and ionic strength-dependence tests revealed that the primary mode of sorption for both cations is specific adsorption while the secondary mode is ion exchange. A rise in pH favours the ion-exchange sorption of Sr while the specific adsorption of Cs is negatively affected. Competitive adsorption of an inert electrolyte, i.e., NaCl, severely hinders Cs sorption, while Sr sorption on water-washed red mud is not significantly affected.

Journal

• Journal of Nuclear Science and Technology

  Journal of Nuclear Science and Technology 32 (10), 1008-1017, 1995

  Atomic Energy Society of Japan

Keywords

• cesium-137
• strontium-90
• adsorption
• sorption
• unconventional sorbents
• bauxite wastes
• red muds
• radionuclide removal
• water treatment
• particle size
• pH value
• ionic strength

Details

• CRID: 1390001204095314816
• NII Article ID: 10002073360
• NII Book ID: AA00703720
• DOI: 10.3327/jnst.32.1008
• COI: 1:CAS:528:DyaK2MXpsValsrg%3D
• ISSN: 18811248
• ISSN: 00223131
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed