管水界面上氧化铜对卤代消毒副产物生成的影响  

The role of cupric oxide on the pipe-water interface on the formation of halogenated disinfection by-products

作　　者：李子祺 刘蕴思 刘超[1,2] LI Ziqi;LIU Yunsi;LIU Chao(Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院生态环境研究中心,中国科学院饮用水科学与技术重点实验室,北京100085 [2]中国科学院大学,北京100049

出　　处：《环境工程学报》2025年第1期51-61,共11页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(52370019)。

摘　　要：输配水管道界面上金属氧化物的沉积可导致管网水质的恶化。氧化铜作为常见管道沉积物,在饮用水输配过程中可能对输配水安全保障有不利影响。本研究探究了不同有机质水体、溴离子浓度、水体pH等水质参数对消毒副产物生成的影响机制,明确了管水界面上氧化铜对氯消毒供水管网中消毒副产物的生成、溴的分布和水体计算毒性的影响。结果表明,当水中溴离子浓度为2μM,氧化铜剂量为0.025 g·L^(−1)时,各有机质水体氯化后受控三卤甲烷的浓度较无氧化铜时提升了6%~51%,非受控消毒副产物卤乙醛、卤乙腈和卤乙酰胺的浓度分别是无氧化铜时的1.8~3.5、1.1~1.8和1.1~2.6倍。溴离子浓度的增加和氧化铜剂量的升高使水中消毒副产物和有机溴浓度与计算毒性升高。其中,由于卤乙腈和卤乙醛是水体计算毒性的驱动因子,受到藻类爆发和污水排放影响的水体氯化后消毒副产物的毒性风险升高。更换管材和调高水体pH是管网输配过程安全控制的可行方法。本研究加深了对消毒副产物在管水界面金属氧化物影响下生成情况的认识,为管网输配水质安全评价与风险调控提供了依据。Deposition of corrosion products on the surface of drinking water distribution pipes has been proven to be important for the distributed water quality deterioration.As a common pipe corrosion product,cupric oxide plays a crucial role in water safety control during drinking water distribution.In this study,the impact of factors including various organic matter origins,initial bromide concentration,and pH was investigated.The effect of cupric oxide on the disinfection by-product formation,bromine fractionation,and calculated toxicity was identified.Results show that for chlorinated water containing various organic matter origins,the regulated THMs increased by 6%~51%,and emerging DBPs,i.e.,HALs,HANs,and HAMs,were 1.8~3.5,1.1~1.8,and 1.1~2.6 times higher in the presence of 2μM bromide and 0.025 g·L^(−1)cupric oxide,respectively,compared with groups without cupric oxide.The increase of bromide concentration and cupric oxide dose increased the disinfection by-product formation,organic bromine concentration,and calculated toxicity.Algal-impacted and effluent-impacted waters exhibited higher toxicity than waters containing natural organic matter since the haloacetonitriles and haloacetaldehydes served as driving factors of calculated toxicity.Changing pipe materials and elevating water pH seem to be alternatives to mitigate the disinfection by-product formation.This study sheds light on the understanding of the disinfection by-product formation under the influence of corrosion products on pipe surface and provides support for distributed water quality evaluation and risk control.

关 键 词：供水管网 氧化铜 氯化过程 有机质 消毒副产物 

分 类 号：TU991.25[建筑科学—市政工程]