在这项研究中，首次进行了使用碳阳极的电化学活化过氧单硫酸盐（PMS）和过氧二硫酸盐（PDS）之间的比较。使用石墨（GR）和多壁碳纳米管（MWCNT）阳极可实现PMS活化，这显着促进了有机污染物磺胺甲基异恶唑（SMX）的降解。自由基探测和清除实验表明，SO 4 • -为优势的反应性物质（64.93％的相对贡献比）。相比之下，在相同条件下，非自由基氧化在电化学活化的PDS工艺中对有机污染物降解的相对贡献率为95.79％。PDS之间的结构差（- ö 4 S-SO4 - ）和PMS（HO-SO 4 - ），导致了他们不同的反应性。电化学活化的PMS分子（充当非自由基氧化的PMS *）比电化学活化的PDS分子（充当非自由基氧化的PDS *）具有更高的反应性和更低的稳定性，因此迅速分解为SO 4 • –。有趣的是，与PDS（非自由基氧化系统）相比，电化学活化的PMS（自由基氧化系统）对水本底成分具有更强的抵抗力，适用于处理复杂的水和含有各种离子和有机化合物的废水。

"点击查看英文标题和摘要"

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.