过氧二硫酸盐
化学
降级(电信)
过硫酸盐
高级氧化法
活性炭
反应性(心理学)
氧化态
光化学
无机化学
吸附
催化作用
有机化学
电信
病理
计算机科学
替代医学
医学
作者
Haoran Song,Linxia Yan,Yuwei Wang,Jin Jiang,Jun Ma,Changping Li,Gang Wang,Jia Gu,Peng Liu
标识
DOI:10.1016/j.cej.2019.123560
摘要
In this study, a comparison between electrochemically activated peroxomonosulfate (PMS) and peroxydisulfate (PDS) using carbon anodes was conducted for the first time. PMS activation was achieved using graphite (GR) and multi-walled carbon nanotube (MWCNT) anodes, which significantly promoted the degradation of organic pollutants sulfamethoxazole (SMX). The radical probing and scavenging experiments demonstrated that SO4− was the dominant reactive species (64.93% relative contribution ratio). By contrast, nonradical oxidation accounted for 95.79% relative contribution ratio to organic pollutants degradation in electrochemically activated PDS process under the identical conditions. The structure difference between PDS (−O4S-SO4−) and PMS (HO-SO4−) led to their various reactivities. The electrochemically activated PMS molecule (PMS*, acting as nonradical oxidation) had higher reactivity and lower stability than electrochemically activated PDS molecule (PDS*, acting as nonradical oxidation), thus to quickly decomposed to SO4−. Interestingly, electrochemically activated PMS (radical oxidation system) exhibited stronger resistance towards water background components than PDS (nonradical oxidation system), being suitable to treat the complicated water and wastewater containing various ions and organic compounds.
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