抗菌剂三氯卡班在水溶液中的光降解  

Photodegradation of antimicrobial triclocarban in aqueous systems

作　　者：冯振涛[1] 刘海津[1] 汪应灵[1] 冯家豪[1] 

机构地区：[1]河南师范大学环境学院河南省环境污染控制重点实验室黄淮水环境与污染防治教育部重点实验室,新乡453007

出　　处：《环境工程学报》2015年第9期4333-4338,共6页Chinese Journal of Environmental Engineering

基　　金：河南省科技厅基础与前沿项目(112300413218;132300410139)

摘　　要：研究了抗菌剂三氯卡班(triclocarban,TCC)在水溶液中的光降解过程及其影响因素,考察了不同光源、溶液pH值、初始TCC浓度、添加光催化剂TiO2及自然界水体中常见阴离子(如Cl-、NO-3和SO2-4)存在的影响。结果表明,TCC在紫外光照射下能进行光降解,其反应符合假一级反应动力学。pH值对TCC在紫外光下的光解过程影响显著,且其降解速率随着pH值的升高而增大。适量添加TiO2能促进TCC的光解速率。无机阴离子Cl-、NO-3和SO2-4的存在阻碍了TCC的光解。此外,还对TCC的降解机理进行了初步推测。This work aimed to investigate the photolysis of triclocarban（ TCC）,an antimicrobial,in water as well as some factors on the photolysis processes,including different light sources,pH values,initial concentrations of TCC,addition of photocatalyst TiO2,coexistence of common anions（e. g.,Cl-、NO-3and SO2-4）.The results showed that TCC degraded more effective under UV light irradiation and the reaction followed pseudofirst order kinetics. Under UV light irradiation,pH value had an effect on TCC photolysis and the degradation rates increased along with pH value. Adding an appropriate amount of TiO2 increased TCC photolysis,whereas the coexistence of Cl-,NO-3and SO2-4 inhibited TCC photodegradation. Furthermore,the mechanism of TCC degradation was speculated.

关 键 词：药品及个人护理用品 三氯卡班 紫外光 光降解 

分 类 号：X703[环境科学与工程—环境工程]