Fe^(2+)激活过硫酸氢钾法降解扑热息痛  

Degradation of Acetaminophen by Fe^(2+)-Activated Peroxymonosulfate Oxidation

作　　者：关小红[1] 辛晓岩 高乃云[1] 谈超群[1] 庄珍珍 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《华南理工大学学报（自然科学版）》2015年第3期137-142,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家科技重大专项(2012ZX07403-001);住房和城乡建设部研究开发项目(2009-K7-4);国家自然科学基金资助项目(51178321)~~

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.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.

关 键 词：扑热息痛 降解 二价铁 过硫酸氢钾 自由基确认 动力学 

分 类 号：X523[环境科学与工程—环境工程]