基于过氧二硫酸盐的高级氧化方法最近引起了越来越多的关注。淬灭残留的过氧二硫酸盐对于准确测量目标污染物的浓度至关重要。但是，很少讨论哪种还原剂最适合过氧二硫酸盐淬灭。在这项研究中，研究了四种常用的淬灭剂（甲醇，抗坏血酸，硫代硫酸钠和亚硫酸钠）对过氧二硫酸盐的淬灭如何影响卡马西平的浓度。亚硫酸钠与卡马西平直接反应，去除率最高，可达39％。过氧二硫酸盐/亚硫酸钠比单独使用亚硫酸钠可获得更高的卡马西平去除率。所以3•- 和 所以5•- 而不是 所以4•-在亚硫酸钠或过二硫酸盐/亚硫酸钠去除卡马西平中起主要作用。发现甲醇不能还原过氧二硫酸盐。当抗坏血酸的浓度比过二硫酸盐高三倍以上时，它是最佳的淬灭剂，在3.5至10.0的pH范围内观察到的卡马西平去除率最低。硫代硫酸钠不适合在pH 3.5时过氧二硫酸盐淬灭，因为它在强酸性条件下会分解并形成亚硫酸氢盐。这项研究的结果为选择过氧二硫酸盐相关的高级氧化过程的合适淬灭剂提供了有价值的指导。

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Peroxydisulfate-based advanced oxidation process has drawn increasing interest recently. Quenching the residual peroxydisulfate is essential for the accurate measurement of the concentration of target pollutants. However, it was rarely discussed which reductant is best for peroxydisulfate quenching. In this study, how the quenching of peroxydisulfate by four commonly used quenchers (methanol, ascorbic acid, sodium thiosulfate and sodium sulfite) affected the concentration of carbamazepine was investigated. Sodium sulfite reacted with carbamazepine directly, with the highest removal rate up to 39%. Higher carbamazepine removal rate was achieved by peroxydisulfate/sodium sulfite than by sodium sulfite alone. SO3•− and SO5•− rather than SO4•− played the major role in carbamazepine removal by sodium sulfite or peroxydisulfate/sodium sulfite. Methanol was found unable to reduce peroxydisulfate. Ascorbic acid, when used with a concentration more than three times higher than that of peroxydisulfate, was the best quencher with the lowest carbamazepine removal rate observed at a pH range of 3.5 to 10.0. Sodium thiosulfate was unfit for peroxydisulfate quenching at pH 3.5 as it was decomposed and formed bisulfite under strong acidic condition. The results of this study provided valuable guidance to the selection of proper quenchers for peroxydisulfate-related advanced oxidation processes.