期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 52, 期 13, 页码 7380-7389出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.8b01662
关键词
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资金
- Brook Byers Institute for Sustainable Systems, Hightower Chair
- Georgia Research Alliance at the Georgia Institute of Technology
- NSF [0854416]
- China Scholarship Council
Chloride ion (Cl-) is one of the most common anions in the aqueous environment. A mathematical model was developed to determine and quantify the impact of Cl- on the oxidization rate of organic compounds at the beginning stage of the UV/persulfate (PS) and UV/H2O2 processes. We examined two cases for the UV/PS process: (1) when the target organic compounds react only with sulfate radicals, the ratio of the destruction rate of the target organic compound when Cl- is present to the rate when Cl- is not present (designated as r(R)(Cl-)/r(R)) is no larger than 1.942%; and (2) when the target organic compounds can react with sulfate radicals, hydroxyl radicals and chlorine radicals, r(R)(Cl-)/r(R), can be no larger than 60%. Hence, Cl- significantly reduces the organic destruction rate in the UV/PS process. In the UV/H2O2 process, we found that Cl- has a negligible effect on the organic contaminant oxidation rate. Our simulation results agree with the experimental results very well. Accordingly, our mathematical model is a reliable method for determining whether Cl- will adversely impact organic compounds destruction by the UV/PS and UV/H2O2 processes.
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