文献类型：期刊文献

英文题名：Removal of trace level amounts of twelve sulfonamides from drinking water by UV-activated peroxymonosulfate

作者：Cui, Changzheng[1];Jin, Lei[2];jiang, Lei[2];Han, Qi[1];Lin, Kuangfei[1];Lu, Shuguang[1];Zhang, Dong[2];Cao, Guomin[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Natl Engn Res Ctr Urban Water Resources, Shanghai 200082, Peoples R China

年份：2016

卷号：572

起止页码：244

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20163202695792);WOS:【SCI-EXPANDED(收录号:WOS:000387807200025)】；

基金：This research was supported by the National Water Pollution Control and Management Technology Major Projects (No. 2012ZX07403-002), Shanghai Science and Technology Rising-Star Program, China (No. 14QB1400800) and Shanghai Municipal Science and Technology Commission (No. 15DZ1205701).

语种：英文

外文关键词：Trace level antibiotics; Sulfonamides; UV activated peroxymonosulfate; Drinking water; Removal

摘要：Trace levels of residual antibiotics in drinking water may threaten public health and become a serious problem in modern society. In this work, we investigated the degradation of twelve sulfonamides (SAs) at environmentally relevant trace level concentrations by three different methods: ultraviolet (UV) photolysis, peroxymonosulfate (PMS) oxidation, and UV-activated PMS (UV/PMS). Sulfaguanidine, sulfadiazine, sulfamerazine, sulfamethazine, sulfathiazole, sulfamethoxydiazine, and sulfadimethoxine were be effectively removed by direct UV photolysis and PMS oxidation. However, sulfanilamide, sulfamethizole, sulfamethoxazole, sulfisoxazole, and sulfachloropyridazine were not completely degraded, despite prolonging the UV irradiation time to 30 min or increasing the PMS concentration to 5.0 mg.L-1. UV/PMS provided more thorough elimination of SAs, as demonstrated by the complete removal of 200 ng.L-1 of all SAs within 5 min at an initial PMS concentration of 1.0 mg.L-1. UV/PMS promoted SA decomposition more efficiently than UV photolysis or PMS oxidation alone. Bicarbonate concentration and pH had a negligible effect on SA degradation by UV/PMS. However, humic acid retarded the process. Removal of 200 ng.L-1 of each SA from a sample of sand-filtered effluent from a drinking water treatment plant (DWTPs) was quickly and completely achieved by UV/PMS. Meanwhile, about 41% of the total organic carbon (TOC) was eliminated. Scavenging experiments showed that sulfate radical (SO4 center dot(-)) was the predominant species involved in the degradation. It is concluded that UV/PMS is a rapid and efficient method for removing trace-level SAs from drinking water. (C) 2016 Elsevier B.V. All rights reserved.