无氧体系下^(60)Coγ射线辐照法去除水中的二氯乙酸  

Elimination of dichloroacetic acid in deaerated aqueous solutions by ^(60)Coγ-rays irradiation

作　　者：李林娜[1] 刘远霞[1] 包华影[1] 

机构地区：[1]北京师范大学化学学院,北京100875

出　　处：《辐射研究与辐射工艺学报》2013年第1期50-54,共5页Journal of Radiation Research and Radiation Processing

基　　金：北京市科委科技计划项目(Z101103004310001);国家自然科学基金项目(20973026)资助

摘　　要：采用60Coγ射线辐照不同无氧体系的二氯乙酸稀水溶液,并用离子色谱方法分析辐照前后溶液中的二氯乙酸以及生成的氯离子浓度。通过比较二氯乙酸的去除率以及生成的氯离子浓度,讨论了吸收剂量和辐照气氛对于二氯乙酸去除效果的影响,并根据结果初步推断其作用机理。Dichloroacetic acid （DCAA） is one of Haloacetic acids （HAAs） which are the main disinfection by-products （DBPs） produced by drinking water chlorination. The irradiation degradation of DCAA by 60Co Y-rays in different anaerobic dilute aqueous solutions was studied. The concentrations of DCAA and chloride ion in the system were analyzed by IC before and after irradiation. The influences of absorbed dose and irradiation aura on the elimina- tion of DCAA were investigated, respectively, by comparing the removal ratio of DCAA with concentration of chlo- ride ion formed. The irradiation degradation mechanism was deduced preliminary according to the experiment results.

关 键 词：二氯乙酸 无氧体系 辐照降解 

分 类 号：O644.22[理学—物理化学] X592[理学—化学]