高锰酸盐、高铁酸盐和臭氧预氧化处理饮用水
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摘要
对高锰酸盐(PM)、高铁酸盐(Fe(VI))和臭氧(O_3)3种氧化剂预处理对饮用水中浊度、溶解性有机碳(DOC)、UV_(254)和溴离子(Br~-)、三卤甲烷(THMs)、卤乙酸(HAAs)含量的影响进行了研究。结果表明,3种预氧化均能在一定程度上提高浊度、DOC、UV_(254)、Br~-的去除效果。其中O_3预氧化取得最好的去除效果,Fe(VI)次之。虽然PM预氧化能在一定程度上提高去除效果,但其去除效果不明显。混凝-沉淀-过滤处理基本不能去除Br~-,滤后出水中ρ(Br~-)/ρ(DOC)升高导致消毒后溴代THMs和HAAs含量升高。预氧化处理导致Br~-含量降低,可以减少溴代THMs和HAAs的比例,同时也能减少总的THMs和HAAs含量。因此预氧化处理可以降低消毒出水中与DBPs相关的毒性。
The effect of pre-oxidation with permanganate(PM),ferrate(Fe(VI))and ozone(O_3)on the removal of turbidity,dissolved organic carbon(DOC),UV_(254),bromide,trihalomethanes(THMs)and haloacetic acids(HAAs)content was investigated.Results showed that three kinds of pre-oxidation could improve the removal of turbidity,DOC,UV_(254),bromide,THMs and HAAs.Pre-oxidation with O_3realized the best performance,followed by Fe(VI)and PM.Although pre-oxidation with PM also promoted the treatment ability to some extent,the removal effect was not obvious.The coagulationsedimentation-filtration(CSF)could not to remove Br~-,and theρ(Br~-)/ρ(DOC)increased in effluent which led to the increase of brominated disinfection THMs AND HAAs content.Pre-oxidation both reduced the total DBP(i.e.THMs and HAAs)content and the ratios of Br-DBPs to Cl-DBPs.Therefore,pre-oxidation treatment could reduce the total toxicity of effluent associated with DBPs.
The effect of pre-oxidation with permanganate(PM),ferrate(Fe(VI))and ozone(O_3)on the removal of turbidity,dissolved organic carbon(DOC),UV_(254),bromide,trihalomethanes(THMs)and haloacetic acids(HAAs)content was investigated.Results showed that three kinds of pre-oxidation could improve the removal of turbidity,DOC,UV_(254),bromide,THMs and HAAs.Pre-oxidation with O_3realized the best performance,followed by Fe(VI)and PM.Although pre-oxidation with PM also promoted the treatment ability to some extent,the removal effect was not obvious.The coagulationsedimentation-filtration(CSF)could not to remove Br~-,and theρ(Br~-)/ρ(DOC)increased in effluent which led to the increase of brominated disinfection THMs AND HAAs content.Pre-oxidation both reduced the total DBP(i.e.THMs and HAAs)content and the ratios of Br-DBPs to Cl-DBPs.Therefore,pre-oxidation treatment could reduce the total toxicity of effluent associated with DBPs.
引文
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[3]黄飘怡,徐斌,郭东良.南水北调中线工程总干渠河南段原水中消毒副产物前体物变化规律[J].环境科学,2018,39(3):1046-1052.
[4]ROOK J J,Formation of haloforms during chlorination of natural water[J].Water Treat Exam,2006,23:234-243.
[5]PLEWA M J,WAGNER E.Charting a new path to resolve the adverse health effects of DBPs,Recent advances in disinfection by-products[J].American Chemical Society2015,26:3-23.
[6]谢家山,高旭,康佳.臭氧联合混凝去除长江源水中有机污染物的小试研究[J].水处理技术,2012,38(S1):110-114.
[7]YANG X,SHANG C,SHEN Q,et al.Nitrogen origins and the role of ozonation in the formation of haloacetonitriles and halonitromethanes in chlorine water treatment[J].Environmental Science&Technology,2012,46(23):12832-12838.
[8]BICHSEL Y,GUNTEN U V.Formation of iodo-trihalomethanes during disinfection and oxidation of iodide-containing waters[J].Environ Sci Technol,2000,34:2784-2791.
[9]生活饮用水卫生标准:GB 5749-2006[S].
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