Co2+/PMS based sulfate-radical treatment for effective mineralization of spent ion exchange resin
| Autor: | Wooyong Um, Muhammad Aamir Hafeez, Juhyeok Lee, Sam A. Walling, Neil C. Hyatt, Jong Heo, Seok Ju Hong, Junsung Jeon, Bhupendra Kumar Singh |
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| Rok vydání: | 2022 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Chemical oxygen demand Public Health Environmental and Occupational Health Cationic polymerization General Medicine General Chemistry Mineralization (soil science) Pollution Catalysis chemistry.chemical_compound chemistry Environmental Chemistry Hydroxyl radical Fourier transform infrared spectroscopy Ion-exchange resin Dissolution Nuclear chemistry |
| Zdroj: | Chemosphere. 287:132351 |
| ISSN: | 0045-6535 |
| Popis: | Sulfate radical advance oxidation processes (SR-AOPs) have attracted a greater attention as a suitable alternative of the hydroxyl radical based advance oxidation process (HR-AOPs). In this study, for the first time we report liquid phase mineralization of nuclear grade cationic IRN-77 resin in Co2+/peroxymonosulfate (PMS) based SR-AOPs. After the dissolution of cationic IRN-77 resin, 30 volatile and 15 semi-volatile organic compounds were analyzed/detected using non-targeted GC-MS analysis. The optimal reaction parameters for the highest chemical oxygen demand (COD) removal (%) of IRN-77 resin were determined, and the initial pH, PMS dosage, and reaction temperature were found to be the most influential parameters for the resin degradation. We successfully achieved ∼90% COD removal (1000 mg/L; 1000 ppm) of dissolved spent resin for SR-AOPs by optimizing the reaction parameters as initial pH = 9, Co2+ = 4 mM (catalyst), PMS = 60 mM (as oxidant) at 60 °C temperature for 60 min reaction. The electron spin resonance spectroscopy (ESR) spectra confirmed the presence of SO4∙- and OH∙ as main reactive species in the Co2+/PMS resin system. In addition, Fourier transform infrared spectroscopy (FT-IR) analyses were used for structural characterization of solid and liquid phase resin samples. We believe that this work will offer a robust approach for the effective treatment of spent resin generated from nuclear industry. |
| Databáze: | OpenAIRE |
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