Study on the characteristics of 2, 4-dichlorophenol in water degraded by UV/PS
CHEN Ju-xiang1,2, GAO Nai-yun2, YANG Jing1, WANG Chao-hui3, GU Zhen-chuan2, Jiang Chuang2
1. College of Architecture and Civil Engineering, Xinjiang University, Urumqi 30047, China;
2. State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China;
3. School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China
The study compared the removal effects and the first order reaction kinetics constants of 2, 4-DCP with PS、UV and UV/PS processes, respectively. Investigated the contribution rate of OH· and SO4·- in the photolysis reaction, calculated the two order kinetics constants for SO4·- with 2, 4-DCP reactions. Meanwhile, the degradation rates in actual water conditions were tested and the economic budge of UV and UV/PS processes were calculated and compared. The results showed that the removal rate of 2, 4-DCP was only 4% in the PS process alone, 46.2% in UV process. The degradation percentage can reach as high as 96.4% with UV/PS process, which effectively improved the degradation effect of 2, 4-DCP, meanwhile 2, 4-DCP degradation by PS, UV and UV/PS fitted the pseudo-first-order reaction equation and the kobs (reaction rate constant) was 0.4×10-3, 6.2×10-3 and 35.1×10-3min-1, respectly. The main contribution function of the photolysis reaction was SO4·-, the second-order-reaction constants for SO4·- with 2, 4-DCP was 7.07×109(mol/L)-1s-1. The photo-degradation rates of 2, 4-DCP in three actual water conditions (Xidong water works, Xijiu reservoir, Hengshan reservoir) were higher than in the ultrapure water. The energy utilization rate of UV/PS cooperative system is the highest during economic calculation.
陈菊香, 高乃云, 杨静, 王超慧, 古振川, 江闯. UV/PS降解水中2,4-二氯苯酚的特性研究[J]. 中国环境科学, 2017, 37(6): 2145-2149.
CHEN Ju-xiang, GAO Nai-yun, YANG Jing, WANG Chao-hui, GU Zhen-chuan, Jiang Chuang. Study on the characteristics of 2, 4-dichlorophenol in water degraded by UV/PS. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(6): 2145-2149.
Hayward K. Drinking water contaminant hit-list for US EPA[J]. Water, 1998,21(4).
[2]
EC Decision 2455/2001/EC of the European Parliameniand of the Council of November20, 2001establishing the list of Priority substances in the field of water Policy and amending Directive 2000/60EC (L331of l5-12-2001).
[3]
Zhang Q, Chen J, Dai C, et al. Degradation of carbamazepine and toxicity evaluation using the UV/persulfate process in aqueous solution[J]. Journal of Chemical Technology and Biotechnology, 2015,90(4):701-708.
Shu H Y, Chang M C, Hunag S W. UV/persulfate advanced oxidation process for degradation of Acid Blue 113wastewater[C]//National Meeting of the American-Chemical-Society. 2014.
[7]
Pereira V J, Linden K G, Weinberg H S. Evaluation of UV irradiation for photolytic and oxidative degradation of pharmaceutical compounds in water[J]. Water Research, 2007, 41(19):4413-4423.
[8]
Dahlén J, Bertilsson S, Pettersson C. Effects of UV-A irradiation on dissolved organic matter in humic surface waters[J]. Environment International, 1996,22(5):501-506.
[9]
Xie P, Ma J, Liu W, et al. Removal of 2-MIB and geosmin using UV/persulfate:contributions of hydroxyl and sulfate radicals[J]. Water Research, 2015,69:223-233.
[10]
Wang C W, Liang C. Oxidative degradation of TMAH solution with UV persulfate activation[J]. Chemical Engineering Journal, 2014,254:472-478.
[11]
Neta, P., Huie, R.E., Ross, A.B., 1988. Rate constants for reactions of inorganic radicals in aqueous solution[J]. J. Phys. Chem. Ref. Data 17(3):1027e1284
[12]
Buxton, G.V., Greenstock, C.L., Helman, W.P., Ross, A.B., 1988.Critical-review of rate constants for reactions of hydrated electrons, hydrogen-atoms and hydroxyl radicals (OH/O) in aqueous solution[J]. J. Phys. Chem. Ref. Data 17(2), 513-886.
Neta P, Huie R E, Ross A B. Rate constants for reactions of inorganic radicals in aqueous solution[J]. Journal of Physical and Chemical Reference Data, 1988,17(3):1027-1284.
[16]
Tan C, Gao N, Deng Y, et al. Degradation of antipyrine by UV, UV/H2O2 and UV/PS[J]. Journal of Hazardous Materials, 2013, 260:1008-1016.
[17]
Bennedsen L R, Muff J, Søgaard E G. Influence of chloride and carbonates on the reactivity of activated persulfate[J]. Chemosphere, 2012,86(11):1092-1097.
[18]
Le Truong G, De Laat J, Legube B. Effects of chloride and sulfate on the rate of oxidation of ferrous ion by H2O2[J]. Water Research, 2004,38(9):2384-2394.
[19]
Liang C, Wang Z S, Mohanty N. Influences of carbonate and chloride ions on persulfate oxidation of trichloroethylene at 20℃[J]. Science of the Total Environment, 2006,370(2):271-277.
