二溴硝基甲烷在紫外光照条件下的光降解

文隆佳; 邓琳; 徐焱钰; 戴文娟

PDF(564 KB)

中国环境科学 ›› 2020, Vol. 40 ›› Issue (5) : 2110-2115.

水污染与控制

二溴硝基甲烷在紫外光照条件下的光降解

文隆佳, 邓琳, 徐焱钰, 戴文娟

作者信息 +

Degradation of dibromonitromethane under UV irradiation

WEN Long-jia, DENG Lin, XU Yan-yu, DAI Wen-juan

Author information +

文章历史 +

摘要

以二溴硝基甲烷为研究，采用单一控制变量法研究了光照强度、初始物浓度、自由氯、溴离子、pH值等影响因子对二溴硝基甲烷光降解的影响，探讨了二溴硝基甲烷的光降解动力学规律.结果表明：二溴硝基甲烷在紫外光条件下的降解遵循一级反应动力学规律，其光降解效率随二溴硝基甲烷初始浓度的增加而减小，随光照强度和pH值增加而增加；溴离子的存在能促进二溴硝基甲烷的光降解；添加自由氯能够显著加快二溴硝基甲烷的光降解效率，并且会使二溴硝基甲烷在光降解的过程中转化为以一溴一氯硝基甲烷为主的其他卤代硝基甲烷.此研究结果可为水处理过程中控制二溴硝基甲烷的形成、降低水质安全风险提供参考.

Abstract

The effects of light intensity, initial concentration, free chlorine, bromine ion and pH value on the photodegradation of dibromonitromethane (DBNM) were studied by single variable control method, and the photodegradation kinetics of DBNM was discussed. The results showed that the photodegradation of DBNM under UV treatment followed first-order kinetics. The photodegradation rate of DBNM decreased with the increasing of initial concentration, increased with the increasing of light intensity and pH value. The presence of bromine ions would slightly promote the photodegradation of DBNM. The addition of free chlorine could significantly accelerate the photodegradation rate of DBNM, and could transform DBNM into the other halonitromethanes (HNMs) which were mainly composed of bromochloronitromethane (BCNM) during the degradation process. The results of this study could provide a reference for controlling the formation of DBNM during water treatment and reducing the risk of water quality safety.

导出引用

文隆佳, 邓琳, 徐焱钰, 戴文娟. 二溴硝基甲烷在紫外光照条件下的光降解[J]. 中国环境科学. 2020, 40(5): 2110-2115

WEN Long-jia, DENG Lin, XU Yan-yu, DAI Wen-juan. Degradation of dibromonitromethane under UV irradiation[J]. China Environmental Science. 2020, 40(5): 2110-2115

中图分类号： X52 X502

参考文献

[1] Reckhow D A, Singer P C, Malcolm R L. Chlorination of humic materials:byproduct formation and chemical interpretations[J]. Environmental Science & Technology, 1990,24(11):1655-1664.
[2] 黄河,徐斌,朱文倩,等.长江沿线城市水源氯(胺)化消毒副产物生成潜能研究[J]. 中国环境科学, 2014,34(10):2497-2504. Huang H, Xu B, Zhu W Q, et al. Distribution of disinfection by-product formation potential by chlor(am)ination in three megalopolis along Yangtze[J]. China Environmental Science, 2014,34(10):2497-2504.
[3] Chu W H, Gao N Y, Deng Y, et al. Impacts of drinking water pretreatments on the formation of nitrogenous disinfection by-products[J]. Bioresource Technology, 2011,102(24):11161-11166.
[4] Hu J, Song H, Addison J W, et al. Halonitromethane formation potentials in drinking waters[J]. Water Research, 2010,44(1):105-114.
[5] Richardson S D, Simmons J E, Rice G. Peer Reviewed:Disinfection Byproducts:The Next Generation[J]. Environmental Science & Technology, 2002,36(9):198A-205A.
[6] Marsa A, Cortes C, Teixido E, et al. In vitro studies on the tumorigenic potential of the halonitromethanes trichloronitromethane and bromonitromethane[J]. Toxicology in Vitro, 2017,45(1):72-80.
[7] Hu J, Song H, Addison J W, et al. Halonitromethane formation potentials in drinking waters[J]. Water Research, 2010,44(1):105-114.
[8] Krasner S W, Weinberg H S, Richardson S D, et al. Occurrence of a new generation of disinfection byproducts[J]. Environmental Science & Technology, 2006,40(23):7175-7185.
[9] Krasner S W, Westerhoff P, Chen B Y, et al. Occurrence of disinfection byproducts in United States wastewater treatment plant effluents[J]. Environmental Science & Technology, 2009,43(21):8320-8325.
[10] Liviac D, Wagner E D, Mitch W A, et al. Genotoxicity of Water Concentrates from Recreational Pools after Various Disinfection Methods[J]. Environmental Science & Technology, 2010,44(9):3527-3532.
[11] Kundu B, Richardson S D, Swartz P D, et al. Mutagenicity in Salmonella of halonitromethanes:A recently recognized class of disinfection by-products in drinking water[J]. Mutation Research/Genetic Toxicology and Environmental Mutagenesis, 2004,562(1/2):39-65.
[12] Chun C L, Hozalski R M, Arnold W A. Degradation of drinking water disinfection by-products by synthetic goethite and magnetite[J]. Environmental Science & Technology, 2005,39(21):8525-8532.
[13] 楚文海,高乃云.饮用水含氮消毒副产物卤化硝基甲烷研究进展[J]. 给水排水, 2008,34(7):34-36. Chu W H, Gao N Y. Research progress of nitrogen-containing disinfection by-products in drinking water[J]. Water & Wastewater Engineering, 2008,34(7):34-36.
[14] 徐斌,田富详,高乃云,等.饮用水中新兴消毒副产物的生成机制与控制理论[M]. 中国建筑工业出版社, 2018. Xu B, Tian F X, Gao N Y, et al. Formation mechanism and control theory of emerging disinfection by-products in drinking water[M]. China Architecture & Building Press, 2018.
[15] Plewa M J, Wagner E D, Jazwierska P, et al. Halonitromethane drinking water disinfection byproducts:chemical characterization and mammalian cell cytotoxicity and genotoxicity[J]. Environmental Science & Technology, 2004,38(1):62-68.
[16] Lee J Y, Pearson C R, Hozalski R M, et al. Degradation of trichloronitromethane by iron water main corrosion products[J]. Water Research, 2008,42:2043-2050.
[17] HJ 585-2010水质游离氯和总氯的测定:N, N-二乙基-1, 4-苯二胺滴定法[S]. HJ 585-2010 Water quality-Determination of free chlorine and total chlorine-Titrimetric method using N, N-diethyl-1, 4-phenylenediamine[S].
[18] USEPA Method 551.1. Determination of chlorination disinfection byproducts, chlorinated solvents and halogenated pesticides/herbicides in drinking water by liquid-liquid extraction and gas chromotography with electron capture detection[S].
[19] Watts M J, Linden K G. Chlorine photolysis and subsequent OH radical production during UV treatment of chlorinated water[J]. Water Research, 2007,41(13):2871-2878.
[20] Lau T K, Chu W, Graham N. The degradation of endocrine disruptor di-n-butyl phthalate by UV irradiation:A photolysis and product study[J]. Chemosphere, 2005,60(8):1045-1053.
[21] Deng L, Hong Z Y, Zhu F F, et al. Formation and degradation of trichloronitromethane of combined UV/chlorine disinfection[J]. Journal of Southeast University, 2017,47(5):972-978.
[22] Mezyk S P, Helgeson T, Cole S K, et al. Free radical chemistry of disinfection by-products. 1. Kinetics of hydrated electron and hydroxyl radical reactions with halomethanes in water[J]. Journal of Physical Chemistry A, 2006,110(6):2176-2180.
[23] Fang J Y, Ling L, Shang C. Kinetics and mechanisms of pH-dependent degradation of halonitromethanes by UV photolysis[J]. Water Research, 2013,47(3):1257-1266.
[24] Chan P Y, Gamal ElDin M, Bolton J R. A solar-driven UV/Chlorine advanced oxidation process[J]. Water Research, 2012,46(17):5672-5682.
[25] Dong H Y, Qiang Z M, Hu J, et al. Degradation of chloramphenicol by UV/chlorine treatment:Kinetics, mechanism and enhanced formation of halonitromethanes[J]. Water Research, 2017,121:178-185.
[26] Deng L, Wen L J, Dai W J, et al. Impact of tryptophan on the formation of TCNM in the process of UV/chlorine disinfection[J]. Environmental Science & Pollution Research, 2018,25(23):23227-23235.
[27] Deng L, Wen L J, Hong Z Y, et al. Direct photodegradation of dichloronitromethane in water under UV irradiation[J]. Fresenius Environmental Bulletin, 2018,4(27),2253-2259.