Sorptive Removal of Cesium-137 and Strontium-90 from Water by Unconventional Sorbents.II. Usage of Coal Fly Ash.

• APAK Resat

  Department of Chemistry, Faculty of Engineering, Istanbul niversity

• ATUN Gulten

  Department of Chemistry, Faculty of Engineering, Istanbul niversity

• GUCLU Kubilay

  Department of Chemistry, Faculty of Engineering, Istanbul niversity

• TUTEM Esma

  Department of Chemistry, Faculty of Engineering, Istanbul niversity

Bibliographic Information

Other Title

• II. Usage of Coal Fly Ash

Abstract

It has been shown that coal fly ash is a good adsorbent for both radionuclides of ¹³⁷Cs and ⁹⁰Sr. Radiocesium adsorption is maximal around the neutral region whereas radiostrontium adsorption increases with pH, especially above pH 8. Cesium retention sharply drops with ionic strength while strontium adsorption increases sharply and steadily at low and moderate concentrations of the inert electrolyte, respectively. The suggested mechanisms of radionuclide retention by fly ash is specific adsorption of Cs⁺ and irreversible ion-exchange uptake of Sr²⁺. The isotherm of adsorption is a Langmuir approximation of the B.E.T. multi-layered sorption. Acid pretreatment of fly ash, though not increasing radionuclide sorption capacity, may be useful in preventing the leach-out of other contaminants from the sorbent into water during the adsorption process.

Journal

• Journal of Nuclear Science and Technology

  Journal of Nuclear Science and Technology 33 (5), 396-402, 1996

  Atomic Energy Society of Japan

Keywords

• adsorption
• fly ash
• adsorbents
• solid wastes
• cesium-137
• strontium-90
• wastewater treatment
• radionuclide removal

Details

• CRID: 1390001204094437248
• NII Article ID: 10002074741
• NII Book ID: AA00703720
• DOI: 10.3327/jnst.33.396
• COI: 1:CAS:528:DyaK28Xjs1yqt7g%3D
• ISSN: 18811248
• ISSN: 00223131
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed