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Response surface methodology approach for optimization of removal of strontium by in-situ electrochemical synthesis of monohydric phosphate intercalated layered double hydroxides.
- Source :
-
Journal of Radioanalytical & Nuclear Chemistry . Jan2023, Vol. 332 Issue 1, p129-141. 13p. 1 Diagram, 8 Charts, 8 Graphs. - Publication Year :
- 2023
-
Abstract
- In this study, in-situ electrochemical synthesis of monohydric phosphate intercalated layered double hydroxides (LDHs) was used to remove Sr2+ from the simulated liquid radioactive wastes. The optimum reaction conditions were obtained by response surface methodology (RSM). The removal of Sr2+ can reach up to 99.30% and the adsorption capacity of Zn–Al–LDHs–HPO4 toward Sr2+ was 6.01 mg/g under optimal conditions. With Sr2+ being removed mainly by multilayer chemisorption, the adsorption kinetics followed Lagergren pseudo-second-order kinetic model, and the adsorption isotherms followed Freundlich model. Thermodynamic studies of adsorption showed that the adsorption of Sr2+ to LDHs was a spontaneous and endothermic process. This method of LDHs synthesis simplifies the operational steps and is a promising treatment method because of its low energy consumption, high efficiency and small solid waste volume. This study provides an innovative idea for the treatment of strontium-containing liquid radioactive wastes from nuclear power plants. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02365731
- Volume :
- 332
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Radioanalytical & Nuclear Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 161418861
- Full Text :
- https://doi.org/10.1007/s10967-022-08680-9