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- Title
Uranium Recovery from Sulfate-Based Acidic Soil Washing Effluent Using Ion-Exchange Resins.
- Authors
Lee, Hyun-Kyu; Park, Wooshin; Chang, Seeun; Jeon, Hongrae; Park, Sungbin
- Abstract
This study aimed to recover U(VI) from sulfate-based acidic soil-washing effluent using the ion-exchange method. For effective ion exchange of U(VI) under acidic conditions, one chelate resin (Purolite S950) stable under low pH conditions and two anion-exchange resins (Ambersep 400 SO4 and 920U SO4) used in sulfuric acid leaching systems were selected. The ionic form of U(VI) changed according to the initial pH conditions of the soil-washing effluent, which affected the U(VI)-ion removal efficiency by the ion-exchange resins. U(VI) ion exchange was consistent with the Langmuir model and followed pseudo-second-order kinetics. Thermodynamic experiments revealed that the U(VI) ion exchange by the ion-exchange resins is an endothermic and spontaneous process. U(VI) was effectively desorbed from the ion-exchange resins using 0.5 M H2SO4 or Na2CO3 solution.
- Subjects
ION exchange resins; SOIL washing; ACID soils; URANIUM; ION exchange (Chemistry); SULFURIC acid
- Publication
Water, Air & Soil Pollution, 2022, Vol 233, Issue 11, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-022-05913-1