1. School of Construction and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China; 2. School of Civil and Environmental Engineering, Harbin Institute of Technology(Shenzhen), Shenzhen 518055, China
Abstract：Monochloroacetic acid (MCAA), a typical aqueous HAAs, was selected as the target pollutant to solve the problem of HAAs pollution in drinking water. MCAA decomposition efficiency and its influencing factors in the high intensity UV/sulfite system were systematically investigated. The results showed efficient MCAA decomposition in the high intensity UV/sulfite system was obtained. MCAA was completely decomposed at its initial concentration of 50μmol/L in 50s. Compared with reportedly literatures related to reductive MCAA decomposition, MCAA decomposition rate in this study was increased above 1000 folds. Increase of sulfite dosage, initial solution pH and UV intensity was found beneficial for increasing MCAA decomposition efficiency in the studied system. Results on co-exsisting constitutents revealed that NH4+ can promote MCAA decomposition, whereas NO3-, HCO3- and NOM all inhibited MCAA decomposition. Amongst them, HCO3- showed less inhibition effect.
Hanson M, Solomon K. Haloacetic acids in the aquatic environment. Part I:macrophyte toxicity[J]. Environmental Pollution, 2004,130:371-383.
[2]
Pals J, Ang J, Wagner E, et al. Biological mechanism for the toxicity of haloacetic acid drinking water disinfection byproducts[J]. Environmental Science & Technology, 2011,45:5791-5797.
[3]
Attene-Ramos M, Wagner E, Plewa M. Comparative human cell toxicogenomic analysis of monohaloacetic acid drinking water disinfection byproducts[J]. Environmental Science & Technology, 2010,44:7206-7212.
[4]
Grigorescu A, Hozalski R, la Para T. Haloaceticacid-degrading bacterial communities in drinking watersystems as determined by cultivation and by terminalrestriction fragment length polymorphism of PCR-amplifiedhaloacid dehalogenase gene fragments[J]. Journal of Applied. Microbiology, 2012,112:809-822.
[5]
Pluchon C, Serodes J, Berthiaume C, et al. Haloacetic acid degradation by a biofilm in a simulated drinking water distribution system[J]. Water Science. Technology-Water Supply, 2013,13:447-461.
[6]
Tang H, Xiang Q, Lei M, et al. Efficient degradation of perfluorooctanoic acid by UV-Fenton process[J]. Chemical Engineering Journal, 2012,184(3):156-162.
[7]
肖扬,罗敏,马玲玲,等.电子束辐照降解水体中的金霉素[J]. 中国环境科学, 2019,39(2):625-633. Xiao Y, Luo M, Ma L L, et al. Degradation of chlorotetracycline by electron beam irradiation in aqueous solution[J]. China Environmental Science, 2019,39(2):625-633.
[8]
古振川,高乃云,安娜,等. Cl-/PMS降解甲氧苄啶的效能与机理[J]. 中国环境科学, 2018,38(3):977-984. Gu Z C, Gao N Y, An N, et al. Efficiency and mechanism of trimethoprim degradation in Cl-/PMS system[J]. China Environmental Science, 2018,38(3):977-984.
[9]
Merino N, Qu Y, Deeb R, et al. Degradation and removal methods for perfluoroalkyland polyfluoroalkyl substances in water[J]. Environmental Engineering Science, 2016,33(9):615-649.
[10]
Harach H, Escalante D, Day E. Thyroid cancer and thyroiditis in Salta, Argentina:A 40-yr study in relation to iodine prophylaxis[J]. Endocrine Pathology, 2002,13(3):175-181.
[11]
周德庆,张双灵,辛胜昌.亚硫酸盐在食品加工中的作用及其应用[J]. 食品科学, 2004,25(12):198-201. Zhou D Q, Zhang S L, Xin S C. Review on function and application of sulfite in food processing[J]. Food Science, 2004,25(12):175-181.
[12]
Liu X W, Zhang T Q, Wang L L, et al. Hydrated electron-based degradation of atenolol in aqueous solution[J]. Chemical Engineering Journal, 2015,260:740-748.
[13]
Zhang Z J, Wang X N, Xue Y C, et al. Enhanced dechlorination of triclosan by hydrated electron reduction in aqueous solution[J]. Chemical Engineering Journal, 2015,263:186-193.
[14]
Tian H T, Gu C. Effects of different factors on photodefluorination of perfluorinated compounds by hydrated electron in organo-montmorillonite[J]. Chemosphere, 2018,191:280-287.
[15]
Sauer M C, Crowell R A, Shkrob I A. Electron photodetachment from aqueous anions. 1. Quantum yields for generation of hydrated electron by 193 and 248nm laser photoexcitation of miscellaneous inorganic anions[J]. Journal of Physical Chemistry A, 2004,108:5490-5502.
[16]
Buxton G, Greenstock C, Helman P, et al. Critical review of rate constants for reactions of hydrated electrons,hydrogen atoms and hydroxyl radicals (·OH/·O-in aqueous solution[J]. Journal of Physical and Chemical Reference Data, 1988,17(2):513-886.
[17]
Wang Y, Zhang P. Effects of pH on photochemical decomposition of perfluorooctanoic acid in different atmospheres by 185nm vacuum ultraviolet[J]. Journal of Environmental Sciences, 2014,26:2207-2214.
[18]
Park H, Vecitis C, Cheng J, et al. Reductive defluorination of aqueous perfluorinated alkyl surfactants:effects of ionic headgroup and chain length[J]. The Journal of Physical Chemistry A, 2009,113(4):690-696.
[19]
Qu Y, Zhang C, Li F, et al. Photo-reductive defluorination of perfluorooctanoic acid in water[J]. Water Research, 2010,44(9):2939-2947.
[20]
Fischer A M, Kliger D S, Winterle J S, et al. Direct observation of phototransients in natural waters[J]. Chemosphere, 1985,14(9):1299-1306.
[21]
Gu Y R, Dong W Y, Luo C, et al. Efficient reductive decomposition of perfluorooctanesulfonate in a high photon flux UV/sulfite system[J]. Environmental Science & Technology, 2016,50(19):10554-10561.
[22]
Hatchard C, Parker C. A new sensitive chemical acinometer II potassium ferrioxalate as a standard chemical actinometer[J]. Proceedings of the Royal Society A, 1956,235:518-536.
[23]
Yang S, Sun J, Hu Y, et al. Effect of vacuum ultraviolet on ultrasonic defluorination of aqueous perfluorooctanesulfonate[J]. Chemical Engineering Journal, 2013,234:106-114.
[24]
Liu Y, Wang Q, Pan J. Novel process of simultaneous removal of nitric oxide and sulfur dioxide using a vacuum ultraviolet (VUV)-activated O2/H2O/H2O2 system in a wet VUV-spraying reactor[J]. Environmental Science & Technology, 2016,50(23):12966-12975.
[25]
Wang X, Ning P, Liu H, et al. Dechlorination of chloroacetic acids by Pd/Fe nanoparticles:effect of drying method on metallic activity and the parameter optimization[J]. Applied Catalysis B:Environmental, 2010,94(1/2):55-63.
[26]
Li A, Zhao X, Hou Y, et al. The electrocatalytic dechlorination of chloroacetic acids at electrodeposited Pd/Fe-modified carbon paper electrode[J]. Applied Catalysis B:Environmental, 2012,111-112:628-635.
[27]
Tang S, Wang X, Mao Y, et al. Effect of dissolved oxygen concentration on iron efficiency:Removal of three chloroacetic acids[J]. Water Research, 2015,73:342-352.
[28]
Tartar H, Garretson H. The thermodynamic ionization constants of sulfurous acid at 25℃[J]. Journal of the American Chemical Society, 1941,63:808-816.
[29]
Li X, Ma J, Liu G, et al. Efficient reductive dechlorination of monochloroacetic acid by sulfite/UV process[J]. Environmental Science & Technology, 2012,46(13):7342-7349.
[30]
Song Z, Tang H, Wang N, et al. Reductive defluorination of perfluorooctanoic acid by hydrated electrons in a sulfite-mediated UV photochemical system[J]. Journal of Hazardous Materials, 2013,262:332-338.
[31]
Ollis D, Pelizzetti E, Serpone N. Photocatalyzed destruction of water contaminants[J]. Environmental Science & Technology, 1991,25(9):1522-1529.
[32]
Jin L, Zhang P. Photochemical decomposition of perfluorooctane sulfonate (PFOS)in an anoxic alkaline solution by 185nm vacuum ultraviolet[J]. Chemical Engineering Journal, 2015,280:241-247.
[33]
Wang Y, Zhang P. Photocatalytic decomposition of perfluorooctanoic acid (PFOA) by TiO2 in the presence of oxalic acid[J]. Journal of Hazardous Materials, 2011,192(3):1869-1875.
[34]
Jung B, Nicola R, Batchelor B, et al. Effect of low-and medium-pressure Hg UV irradiation on bromate removal in advanced reduction process[J]. Chemosphere, 2014,117:663-672.
[35]
Yamamoto T, Noma Y, Sakai S, et al. Photodegradation of perfluorooctane sulfonate by UV irradiation in water and alkaline 2-propanol[J]. Environmental Science & Technology, 2007,41(16):5660-5665.
[36]
Yoon S, Han D, Liu X, et al. Degradation of 1,2-dichloroethane using advanced reduction processes[J]. Journal of Environmental Chemical Engineering, 2014,2:731-737.
[37]
Zhang Q, Li C, Li T. Rapid photocatalytic degradation of methylene blue under high photon flux UV irradiation:characteristics and comparison with routine low photon flux[J]. International Journal of Photoenergy, 2012,2012(3):251-268.
[38]
Zhang Q, Li C, Li T. Rapid photocatalytic decolorization of methylene blue using high photon flux UV/TiO2/H2O2 process[J]. Chemical Engineering Journal, 2013,217:407-413.
[39]
Lyu X, Li W, Lam P, et al. Photodegradation of perfluorooctane sulfonate in environmental matrices[J]. Separation and Purification Technology, 2015,151(13):172-176.
[40]
Thomas-Smith T, Blough N. Photoproduction of hydrated electron from constituents of natural waters[J]. Environmental Science & Technology, 2001,35(13):2721-2726.
[41]
Zeep R. Photoproduction of hydrated electrons from natural organic solutes in aquatic environments[J]. Environmental Science & Technology, 1987,21(5):485-490.
[42]
Huang L, Deng W, Hou H. Investigation of the reactivity of hydrated electron toward perfluorinated carboxylates by laser flash photolysis[J]. Chemical Physics Letters, 2007,436(1-3):124-128.
