铁电极耦合过硫酸盐降解典型PPCP的效能及机理  

Performance and Mechanism on the Degradation of Typical PPCP by Iron Electrode Coupled with Persulfate

作　　者：吴阳春 杨利 赵志强 孙聚龙 卜令君 WU Yangchun YANG Li ZHAO Zhiqiang SUN Julong BU Lingjun(Hunan Province Architectural Design Institute, Changsha, Hunan 410082, China Public Security Fire Department of Hunan Province, Public Security Fire Control Team of Hengyang City, Hengyang, Hunan 421000, China Anar Group Ltd., Beijing 102488, China College of Civil Engineering, Hunan University, Changsha, Hunan 410082, China)

机构地区：[1]湖南省建筑设计院,长沙410004 [2]湖南省公安消防总队衡阳市公安消防支队,湖南衡阳421000 [3]石榴集团置业有限公司,北京102488 [4]湖南大学土木工程学院,长沙410082

出　　处：《湖南城市学院学报（自然科学版）》2017年第4期74-78,共5页Journal of Hunan City University:Natural Science

摘　　要：本文研究了铁电极活化过硫酸钠(EC/PS)产生自由基降解奥卡西平的反应,该方法10 min内对奥卡西平的去除率(75%)远远高于单独电絮凝(10%)和单独过硫酸盐氧化(2%)﹒探究了反应体系中奥卡西平初始浓度、电流、初始pH以及羟胺含量等因素对奥卡西平降解效率的影响,结果显示较高的电流(50 mA)、较低的奥卡西平浓度(10μM)及初始pH(pH=3)更有利于奥卡西平的降解﹒通过投加不同的过量猝灭剂(甲醇和叔丁醇),表明了反应体系中羟基自由基(OH·)和硫酸根自由基(SO_4^-·)同时存在,且均发挥重要作用﹒The paper deals with the degradation of oxcarbazepine （OXC） by electrochemically activated persulfate （EC/PS） using iron anode. EC/PS system showed higher removal efficiency for OXC than electrocoagulation （10%） and PS oxidation alone （2%） in 10 min. Factors influencing the degradation efficiency of OXC were also investigated, including current density, initial concentration of OXC, initial pH, and concentration of hydroxylamine. Results demonstrated that higher current density （50 mA）, lower initial OXC concentration （10 μM） and pH （pH=3） were favorable for the degradation of OXC. Besides, by adding different dosages of scavengers （methanol and TBA）, hydroxyl radical （OH·） and sulfate radical （SO4-·） were identified to be responsible for OXC degradation, and both of them made major contributions.

关 键 词：奥卡西平 自由基 电化学 动力学 

分 类 号：X522[环境科学与工程—环境工程]