Removal and degradation mechanism of triclosan by the UV/chlorine process
ZHOU Si-qi1, LI Jia-qi1, DU Er-deng1, LI Miao2, LIU Xiang2
1. School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, China; 2. School of Environmental, Tsinghua University, Beijing 100084, China
Abstract：Degradation of triclosan(TCS), a kind of broad-spectrum antimicrobial agent, was studied in water by the UV/chlorine advanced oxidation process. The removal of TCS by single UV, single chlorination and the UV/chlorine process was compared. The effect of different factors on the UV/chlorine process was investigated, including UV intensity, initial residual chlorine, pH value and ammonia concentration. The degradation mechanism and the ecological risk were further discussed. The results indicated that TCS had higher removal by the UV/chlorine process compared with single UV and single chlorination. The reaction fitted pseudo-first-order kinetics. The degradation rate increased with the increase of UV intensity and initial residual chlorine, while decreased with the increase of ammonia concentration. Seventeen intermediates were identified by HRMS Q-TOF, and the possible degradation pathway was also proposed. Both luminescent bacteria experiment and ECOSAR prediction showed that intermediates with high toxicity were produced on TCS degradation by the UV/chlorine process. With the process of reaction, intermediates generated with lower toxicity, and the ecological environment risk was reduced.
周思琪, 李佳琦, 杜尔登, 李淼, 刘翔. UV/Cl工艺对三氯生的去除与降解机理研究[J]. 中国环境科学, 2019, 39(3): 1000-1008.
ZHOU Si-qi, LI Jia-qi, DU Er-deng, LI Miao, LIU Xiang. Removal and degradation mechanism of triclosan by the UV/chlorine process. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(3): 1000-1008.
刘莹,管运涛,水野忠雄,等.药品和个人护理用品类污染物研究进展[J]. 清华大学学报(自然科学版), 2009,(3):368-372. Liu Y, Guan Y T, Mizuno T, et al. Recent research advances of pharmaceuticals and personal care pollutants[J]. Tsinghua University(Sci & Tech), 2009,(3):368-372.
[2]
乔铁军,张锡辉,欧慧婷.药品和个人护理用品在水环境中污染状况的研究与展望[J]. 给水排水, 2009,35(7):121-130. Qiao T J, Zhang X H, Ou H T. Advances and prospects on pharmaceuticals and personal care products in aquatic environment[J]. Geomatics World, 2009,35(7):121-130.
[3]
Chen X J, Jessica R, Liu Y, et al. Ozonation products of triclosan in advanced wastewater treatment[J]. Water Research, 2012,46(7):2247-2256.
[4]
Song Z, Wang N, Zhu L H, et al. Efficient oxidative degradation of triclosan by using an enhanced Fenton-like process[J]. Chemical Engineering Journal, 2012,198-199(8):379-387.
[5]
Brausch J M, Rand G M. A review of personal care products in the aquatic environment:Environmental concentrations and toxicity[J]. Chemosphere, 2011,82(11):1518-1532.
[6]
Fang J Y, Fu Y, Shang C. The Roles of Reactive Species in Micropollutant Degradation in the UV/Free Chlorine System[J]. Environmental Science & Technology, 2014,48(3):1859-1868.
[7]
刘嘉健,吴梓昊,方晶云.UV/氯高级氧化技术对水中嗅味物质的降解动力学研究[C]//中国环境科学学会, 2015. Liu J J, Wu Z H, Fang J Y. Degradation kinetics of odorant substances in water by the UV/chlorine advanced oxidation technology[C]//Chinese Society For Environmental Sciences, 2015.
[8]
陈成,杨绍贵,孙成,等.阿特拉津在紫外-氯消毒中的转化特性及机理研究[J]. 农业环境科学学报, 2009,28(6):1302-1306. Chen C, Yang S G, Sun C, et al. Conversion Characteristics and Mechanism of Atrazine in a Combination of UV and Chlorination[J]. Journal of Agro-Environment Science, 2009,28(6):1302-1306.
[9]
张永吉,刘文君,张琳.氯对紫外线灭活枯草芽孢杆菌的协同作用[J]. 环境科学, 2006,27(2):329-332. Zhang Y J, Liu W J, Zhang L. Synergistic disinfection of Bacillus subtilis spores by UV irradiation and chlorine[J]. Environmental Science, 2006,27(2):329-332.
[10]
Pan Y, Cheng S, Yang X, et al. UV/chlorine treatment of carbamazepine:Transformation products and their formation kinetics[J]. Water Research, 2017,116:254.
[11]
Kong X, Jiang J, Ma J, et al. Degradation of atrazine by UV/chlorine:Efficiency, influencing factors, and products[J]. Water Research, 2016,90:15-23.
[12]
Sapozhnikova Y, Hedgespeth M, Wirth E, et al. Analysis of selected natural and synthetic hormones by LC-MS-MS using the US EPA method 1694[J]. Analytical Methods, 2011,3(5):1079-1086.
[13]
李玉瑛,何文龙,李青松,等.UV协同ClO2去除三氯生及其降解产物的研究[J]. 环境科学, 2015,(2):516-522. Li Y Y, He W L, Li Q S, et al. Removal of triclosan with the method of UV/ClO2 and its degradation products[J]. Environmental Science, 2015,(2):516-522.
[14]
庞宇辰,席劲瑛,胡洪营,等.再生水紫外线-氯联合消毒工艺特性研究[J]. 中国环境科学, 2014,34(6):1429-1434. Pang Y C, Xi J Y, Hu H Y, et al. Evaluation of sequential use of UV irradiation and chlorination to disinfect reclaimed water[J]. China Environmental Science, 2014,34(6):1429-1434.
[15]
李青松,李学艳,姚宁波,等.UV/SPS降解水中三氯生的效能及动力学[J]. 环境科学, 2017,38(4):1467-1476. Li Q S, Li X Y, Yao N B, et al. Degradation efficiency and kinetics of Triclosan in Aqueous Solution by UV/Sodium persulfate[J]. Environmental Science, 2017,38(4):1467-1476.
[16]
樊鑫鑫,杜尔登,李佳琦,等.萘普生在氯消毒过程中的去除、转化与风险评价[J]. 环境科学, 2018,4:1645-1653. Fan X X, Du E D, Li J Q, et al. Chloriation of naproxen:Removal, transformation and risk assessment[J]. Environmental Science, 2018,4:1645-1653.
[17]
付永胜,史鸿乐,刘义青,等.UV/H2O2光化学降解水中的三氯生[J]. 中国环境科学, 2018,38(2):616-626. Fu Y S, Shi H L, Liu Y Q, et al. Photochemical degradation of Triclosan by UV/H2O2 in water[J]. China Environmental Science, 2018,38(2):616-626.
[18]
Kliegman S, Eustis S N, Arnold W A, et al. Experimental and theoretical insights into the involvement of radicals in triclosan phototransformation[J]. Environmental Science & Technology, 2013,47(13):6756-6763.
[19]
Tian F, Liu W, Guo G, et al. Kinetics and mechanism of dimethoate chlorination during drinking water treatment[J]. Chemosphere, 2014, 103(1):181-187.
[20]
Fiss E M, Rule K L, Vikesland P J. Formation of chloroform and other chlorinated byproducts by chlorination of triclosan-containing antibacterial products[J]. Environmental Science & Technology, 2007, 41(7):2387-2394.
[21]
Yang B, Ying G G, Zhao J L, et al. Oxidation of triclosan by ferrate:reaction kinetics, products identification and toxicity evaluation[J]. Journal of Hazardous Materials, 2011,186(1):227-235.
[22]
Song Z, Wang N, Zhu L, et al. Efficient oxidative degradation of triclosan by using an enhanced Fenton-like process[J]. Chemical Engineering Journal, 2012,198-199(8):379-387.
[23]
Chen J, Qu R, Pan X, et al. Oxidative degradation of triclosan by potassium permanganate:Kinetics, degradation products, reaction mechanism, and toxicity evaluation[J]. Water Research, 2016,103:215-223.
[24]
Jones O A H, Voulvoulis N, Lester J N. Aquatic environmental assessment of the top 25 English prescription pharmaceuticals[J]. Water Research, 2002,36(20):5013-5022.
[25]
Giddings J M, Salvito D, Putt A E. Acute toxicity of 4-amino musk xylene to Daphnia magna in laboratory water and natural water[J]. Water Research, 2000,34(14):3686-3689.
