期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 51, 期 4, 页码 2312-2320出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.6b04528
关键词
-
资金
- Research Grants Council of Hong Kong [17206714, 17212015, C7044-14G]
The development of environmentally friendly, oxidalion -selective advanced oxidation processes (AOPs) for water decontamination is important for resource recovery, carbon dioxide abatement, and cost savings. In this study, we developed an innovative AOP using a combination of peroxymonosulfate (PMS) and iodide ions (I-) for the selective removal of phenolic pollutants from aqueous solutions. The results showed that nearly 100% degradation of phenol, bisphenol A, and hydroquinone was achieved after reaction for 4 min in the presence of 65 mu M PMS and 50 mu M I-. PMS-I- oxidation had a wide effective pH range, with the best performance achieved under circumneutral conditions. The ratio between [PMS] and [I-] influenced the degradation, and the optimal ratio was approximately 1.00 for the degradation of the phenols. Neither sulfate nor hydroxyl radicals were found to be the active species in PMS-I- oxidation. Instead, we found evidence that iodide atoms were the dominant oxidants. In addition, both Cl- and Br also promoted the degradation of phenol in PMS solution. The results of this work may promote the application of reactive halogen species in water treatment.
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