新冠肺炎疫情爆发前后南淝河城区段水体中含氯化合物含量比较  

Comparisons in Concentrations of Chlorine Compounds in Urban Section of Nanfeihe River before and after COVID-19 Epidemic

作　　者：杨长明[1] 陈霞智 王汉宇 YANG Changming;CHEN Xiazhi;WANG Hanyu(Key Laboratory of Yangtze River Water Environment of MOE,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学环境科学与工程学院长江水环境教育部重点试验室,上海200092

出　　处：《环境科学与技术》2020年第8期172-176,共5页Environmental Science & Technology

基　　金：国家水污染控制与治理科技重大专项:多元重污染小流域综合治理技术集成及应用推广(2017ZX07603003)。

摘　　要：2020年初新冠肺炎疫情的蔓延造成了医疗消毒剂的广泛使用,这必然会对自然水环境生态平衡产生冲击。该文以合肥市为例,通过资料收集、实地调查和现场采样分析,研究了目前使用的主要消毒剂种类、毒性及其在南淝河水体中的分布特征,重点讨论了其对水环境和水生态的影响。研究结果表明,在此次疫情期间,合肥南淝河城市段不同断面水体含氯化合物(以总氯计)的总量为5.52~48.7μg/L,较非疫情期间出现了明显增加,说明疫情期间大量使用消毒剂已经对城市水体造成不利影响。通过比较发现,污水处理厂尾水和雨水排口附近点位含氯化合物明显高于其他点位。结果表明,含氯消毒剂及其副产物进入水环境的途径主要包括尾水排放和地表雨水径流形成的面源污染。应从源头控制-过程削减-末端治理全过程管控,并结合厂网河(湖)一体化全过程监管,以降低或消除消毒剂大量使用对城市水环境和水生态健康的不利影响。The spread of COVID-19 epidemic in early 2020 has led to the widespread use of medical disinfectants,which will inevitably impact the ecological balance of natural water environment.Based on the data collection,field investigation and sampling and analysis,the main disinfectant types,toxicity and their distribution characteristics in Nanfeihe River,an urban river in Hefei City,Anhui Province were analyzed and studied,with the emphasis on the impact on water environment and aquatic ecosystem.The results showed that the most widely used disinfectant is chlorine containing disinfectant in the COVID-19 epidemic,and the total amount of the disinfectants and its by-products as calculated by total chlorine in the urban section of the River is 5.52~48.7μg/L,which is significantly higher than the measured value during non COVID-19 epidemic period.It shows that the use of chlorine containing disinfectants during the epidemic has caused residues in urban water.In addition,the sampling points near the effluent of sewage treatment plant and rainwater discharge had significantly higher chlorine compounds,as compared with other points,indicating the ways of the disinfectant and its by-products entering water environment mainly including effluent discharge from sewage treatment plants and non-point source pollution caused by urban surface rainwater runoff.In order to reduce or eliminate the adverse effects of use of disinfectants on the urban water environment and aquatic ecological health,source control,process reduction,and terminal treatment,as well as supervision of the whole process of plant-network-river integration should be considered in future work.

关 键 词：新冠肺炎流行 城市河流 消毒剂 含氯化合物 水域生态系统 

分 类 号：X52[环境科学与工程—环境工程]