华南理工大学学报(自然科学版) ›› 2015, Vol. 43 ›› Issue (3): 137-142.doi: 10.3969/j.issn.1000-565X.2015.03.020

• 环境科学技术 • 上一篇    下一篇

Fe2+ 激活过硫酸氢钾法降解扑热息痛

关小红 辛晓岩 高乃云 谈超群 庄珍珍   

  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
  • 收稿日期:2014-05-14 修回日期:2014-07-14 出版日期:2015-03-25 发布日期:2015-02-10
  • 通信作者: 高乃云(1949-),女,教授,博士生导师,主要从事饮用水处理技术研究. E-mail:gaonaiyun@sina.com
  • 作者简介:关小红(1977-),女,教授,博士生导师,主要从事水污染控制研究. E-mail: guanxh@ tongji. edu. cn
  • 基金资助:

    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)

Degradation of Acetaminophen by Fe2+ -Activated Peroxymonosulfate Oxidation

Guan Xiao-hong Xin Xiao-yan Gao Nai-yun Tan Chao-qun Zhuang Zhen-zhen   

  1. State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Shanghai 200092,China
  • Received:2014-05-14 Revised:2014-07-14 Online:2015-03-25 Published:2015-02-10
  • Contact: 高乃云(1949-),女,教授,博士生导师,主要从事饮用水处理技术研究. E-mail:gaonaiyun@sina.com
  • About author:关小红(1977-),女,教授,博士生导师,主要从事水污染控制研究. E-mail: guanxh@ tongji. edu. cn
  • Supported by:
    Supported by the National Science and Technology Major Project (2012ZX07403-001),the Research and Development Project of Ministry of Housing and Urban-Rural Construction of China(2009-K7-4)and the National Natural Science Foundation of China(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.

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

Abstract: 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 pH 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.

Key words: acetaminophen, degradation, bivalent iron, peroxymonosulfate, radical verification, kinetics

中图分类号: