超声、紫外增强H2O2/KI降解磺胺甲基嘧啶  

Enhancement of Sulfamerazine Degradation Under H_2O_2/KI System by Ultrasound and UVA Irradiation

作　　者：魏红[1] 孙博成 杨小雨[1] 李克斌[2] 

机构地区：[1]西安理工大学西北旱区生态水利工程国家重点实验室培育基地,西安710048 [2]西北大学化学与材料科学学院,合成与天然功能分子化学教育部重点实验室,西安710069

出　　处：《环境科学》2017年第6期2393-2399,共7页Environmental Science

基　　金：国家自然科学基金项目(51409211);陕西省教育厅重点实验室项目(13JS067);陕西省水利科技项目(2013slkj-07);环境工程国家重点学科培育学科项目(106-5X1204)

摘　　要：实验以H_2O_2和KI作为分子碘(I2)的来源,研究比较了超声、紫外分别增强H_2O_2/KI降解磺胺甲基嘧啶(sulfamerazine,SMR)的效果、主要影响因素、分子碘的生成、主要活性物种和产物.结果表明,超声、紫外均能有效增强H_2O_2/KI对磺胺甲基嘧啶的降解,超声的增强效果明显;pH值对磺胺甲基嘧啶的去除率影响较大,pH为2.6~5.6,去除率随pH升高而降低;自由基抑制结果表明,碘自由基(I·和I-2·)是超声、紫外增强H_2O_2/KI降解磺胺甲基嘧啶的主要活性物质.HPLC/MS/MS分析检测到一碘代苯.The degradation of Sulfamerazine（SMR） enhanced by molecular iodine under ultrasound/H2O2/KI and UVA/H2O2/KI was investigated. The main affecting parameters, iodine generation, active species and degradation products in the two systems were discussed as well. The experimental results showed that sulfamerazine degradation was effectively enhanced in both systems, and the enhancement of ultrasound was much better. The initial pH had an obvious effect on sulfamerazine removal in the range of 2.6-5.6, and the SMR removal efficiency decreased with initial pH value. Iodine radicals （I2-·, I·） were determined as the main species in ultrasound/H2O2/KI and UVA/H2O2/KI systems. HPLC/MS/MS analysis indicated that iodo-benzene was detected in both system.

关 键 词：磺胺甲基嘧啶 H2O2/KI 碘自由基 超声 紫外 

分 类 号：X703.1[环境科学与工程—环境工程]