2,6-dichloro-1,4-benzoquinone (abbreviated as 2,6-DCBQ), one kind of disinfection by-products (DBPs) in drinking water has a vital impact on human health. Therefore, the study on the control of 2,6-DCBQ by an integrated ozone-granular activated carbon (O3/GAC) process was made. In addition, the degradation mechanism and its dynamics were analyzed and discussed. The results indicated that the 2,6-DCBQ removal with individual O3 or GAC process reached 29.64% and 32.81% respectively. The 2,6-DCBQ could be removed more effectively by O3/GAC compared to the individual O3 or GAC process, and the efficiency was increased with the raise of initial concentration of 2,6-DCBQ, O3 levels and GAC dosage. It was also found that the 2,6-DCBQ removal reached 85.37% after the reaction time of 90minutes with the initial 2,6-DCBQ concentration, O3 concentration and GAC addition of 20μg/L, 10.06mg/L and 0.5g/L, respectively. The degradation process of 2,6-DCBQ by O3/GAC fit the first-order reaction kinetic model.
Richardson S D, Plewa M J, Wagner E D, et al. Occurrence, genotoxicity, and carcinogenicity of regulated and emerging disinfection byproducts in drinking water:A review and roadmap for research[J]. Mutation Research, 2007,636(1/3):178-242.
[2]
Liu J Q, Zhang X R. Comparative toxicity of new halophenolic DBPs in chlorinated saline wastewater effluents against a marine alga:Halophenolic DEPs are generally more toxic than haloaliphatic ones[J]. Water Research, 2015,65:64-72.
Florentin A, Hautemaniere A, Hartemann P. Health effects of disinfection by-products in chlorinated swimming pools[J]. International Journal of Hygiene and Environmental Health, 2011,214(6):461-469.
Wei X, Chen X, Wang X, et al. Occurrence of Regulated and Emerging Iodinated DBPs in the Shanghai Drinking Water[J]. PLos One, 2013,8(3):1-7.
[7]
Abbas S, Hashmi I, Rehman M S, et al. Monitoring of chlorination disinfection by-products and their associated health risks in drinking water of Pakistan[J]. Journal of Water and Health, 2015,13(1):270-284.
[8]
Heasley V L, Fisher A M, Herman E E, et al. Investigations of the reactions of monochloramine and dichloramine with selected phenols:Examination of humic acid models and water contaminants[J]. Environment Science and Technology, 2004, 38(19):5022-5029.
[9]
Zhao Y L, Anichina J, Lu X F, et al. Occurrence and formation of chloro-and bromo-benzoquinones during drinking water disinfection[J]. Water Research, 2012,46:4351-4360.
[10]
Plewa M J, Wagner E D, Richardson S D, et al. Chemical and biological characterization of newly discovered iodoacid drinking water disinfection byproducts[J]. Environment Science and Technology, 2004,38(18):4713-4722.
[11]
Zhao Y L, Qin F, Boyd J M, et al. Characterization and determination of chloro-and bromo-benzoquinones as new chlorination disinfection byproducts in drinking water[J]. Analytical Chemistry, 2010,82(11):4599-4605.
[12]
Bull R J, Reckhow D A, Li X F, et al. Potential carcinogenic hazards of non-regulated disinfection by-products:haloquinones, halocyclopentene and cyclohexene derivatives, N-halamines, halonitriles and heterocyclic amines[J]. Toxicology, 2011, 286(1-3):1-19.
[13]
Anichina J, Zhao Y L, Hrudey S E, et al. Electrospray ionization mass spectrometry characterization of interactions of newly identified water disinfection byproducts halobenzoquinones with oligodeoxynucleotides[J]. Environmental Science and Technology, 2012,44:9557-9563.
[14]
Bull R J, Reckhow D A, Rotello V, et al. Use of toxicological and chemical models to prioritize DBP research[R]. American Water Works Association Research Foundation and American Water Works Association:Denver, CO, 2006.
[15]
Li J H, Wang W, Zhang H Q, et al. Glutathione-Mediated Detoxification of Halobenzoquinone Drinking Water Disinfection Byproducts in T24Cells[J]. Toxicological sciences, 2014,141(2):335-343.
[16]
Chu W H, Gao N Y, Yin D Q, et al. Ozone-biological activated carbon integrated treatment for removal of precursors of halogenated nitrogenous disinfection by-products[J]. Chemosphere, 2012,86:1087-1091.
US EPA. Method 552.3, Determination of haloacetic acids and dalapon in drinking by liquid-liquid micro extraction, derivatization, and gas chromatography with electron capture detection[S]. Cincinnati:Technical support center office of ground water and drinking water, 2003.
Yan M Q, Wang D S, Ma X N, et al. THMs precursor removal by an integrated process of ozonation and biological granular activated carbon for typical Northern China water[J]. Separation Purification Technology, 2010,72:263-268.
Xu B, Gao N Y, Sun, X F, et al. Characteristics of organic material in Huangpu River and treatability with the O3-BAC process[J]. Separation Purification Technology, 2007,57:348-355.
