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中文摘要：
研究了Fe2＋激活过硫酸氢钾（PMS）降解扑热息痛（APAP）的反应.通过考察反应的影响因子、动力学、矿化率及自由基（SO-·4及OH·）确认情况,发现反应分为快速反应阶段和慢速反应阶段,降解反应中PMS与Fe2＋浓度比值为1.5∶1时APAP的降解速率最大,最适宜p H值为5.0,反应在较高的PMS及Fe2＋投量下可获得55%以上的矿化率.通过电子自旋共振（ESR）检测直接证实：PMS-Fe2＋系统降解APAP的反应过程中有SO-·4及OH·的出现,并且对APAP降解起主要作用;反应开始3min左右SO-·4及OH·均出现,随后OH·减少直至消失,SO-·4是慢速反应阶段的主要自由基.
英文摘要：
This paper deals with the degradation of acetaminophen by Fe2＋-activated peroxymonosulfate（ PMS） in aqueous solution. By investigating the effect factors,reaction kinetics,mineralization and radical（ SO-·4or OH·）identification,two degradation stages,one is fast and the other is slow,are discovered,and an optimal concentration ratio of PMS to Fe2＋,namely 1. 5∶1,is determined for achieving the highest degradation rate. Moreover,it is found that the optimal p H value is 5. 0,and that relatively high PMS and Fe2＋dosages help achieve a mineralization rate more than 55%. ESR test indicates that SO-·4 and OH·appear in the degradation process and play their important roles; and that SO-·4 and OH·appear after 3 min from the reaction initiation,then the quantity of OH·decreases and then vanishes,so that SO-·4 is the main radical for the slow degradation stage.
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