次氯酸钠氧化降解水杨酸  

Oxidation of salicylic acid by sodium hypochlorite

作　　者：冯家豪[1] 刘海津[1] 汪应灵[1] 冯振涛[1] 刘国光[1,2] 

机构地区：[1]河南师范大学环境学院,新乡453007 [2]广东工业大学环境科学与工程学院,广州510006

出　　处：《环境工程学报》2016年第2期531-536,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21377031);河南省基础与前沿技术项目(132300410139;132300410158);河南省教育厅科学技术研究重点项目(13A610528)

摘　　要：采用次氯酸钠对PPCPs(药品和个人护理用品)类污染物水杨酸(SA)的氧化消除及动力学规律进行研究,考察了p H值、温度、Br-浓度以及水体中常见有机物等各因素对降解效果的影响。结果表明,次氯酸钠对SA的氧化降解过程符合二级反应动力学;p H值对该降解反应影响较大,随着p H值的降低,反应速率增大;温度对该降解反应的影响明显且符合Van’t Hoff规则,提高反应温度,有利于降解进行。向体系中加入Br-,可以加快次氯酸钠对SA的氧化降解,并随着Br-浓度的增加,SA降解的速率逐渐增加。水体中有腐殖酸和表面活性剂存在时,对水杨酸的氧化反应也会产生一定的影响。We studied on the degradation of salicylic acid（ SA）,one of PPCPs（ pharmaceuticals and personal care products）,with sodium hypochlorite. Some factors such as p H value,concentration of bromide ion、temperature and organic compounds in water were investigated. The results showed that the degradation of SA by sodium hypochlorite followed second order kinetics. p H value had a great influence on the degradation of SA.The reaction rate constant increased along with p H value decrease. Temperature also played a role on the reaction—the removal rate of SA increased along with temperature increasing,which followed Van＇t Hoff Rule. Furthermore,adding bromide ion into the reaction accelerated the degradation of SA. Humic acid and surfactants had effect on SA degradation as well.

关 键 词：PPCPS 水杨酸 氧化 PH 溴离子 温度 

分 类 号：X703[环境科学与工程—环境工程]