环境与职业医学2024，Vol.41Issue(4)：420-424,5.DOI:10.11836/JEOM23297
应用中断时间序列方法评估干预措施对陆家嘴水厂出厂水三卤甲烷的影响
Assessment of intervention measures on trihalomethane in finished water by interrupted time series analysis
摘要
Abstract
[Background]The Qingcaosha Reservoir is facing issues of algal blooms and eutrophication,and the resulting increase in the level of chlorination disinfection by-products in the water has been a major concern. [Objective]To evaluate the impact of"Algae Monitoring and Control Program in Qingcaosha Reservoir"(hereinafter referred to as the program)on the control of trihalomethanes(THMs)in conventional finished water. [Methods]From 2011 to 2019,water samples were collected from the Lujiazui Water Plant once per season,one sample each time,and the concentrations of four THMs(trichloromethane,dichlorobromomethane,monochlorodibromomethane,and tribromomethane)were measured in the samples.Using 2014 when the program was implemented as a cut-off point,the entire study period was divided into two phases:pre-implementation(2011-2013)and post-implemen-tation(2014-2019).Segmented linear regression with interrupted time series analysis was applied to assess the concentrations and trends of THMs in the finished water before and after the program launch. [Results]The concentration of total THMs in finished water increased by 1.561 μg·L-1(P=0.010)for each season of time extension before launching the program.The change in the concentration of total THMs in finished water was not statistically significant after the program launch,but the THMs concentration showed a decreasing trend as the slope was-0.626(P=0.001).From 2017 until the end of 2019,the average con-centration of THMs in finished water of Lujiazui Water Plant dropped to 10 μg·L-1 or less. [Conclusions]The algae and eutrophication control measures in Qingcaosha Reservoir have achieved good results,controlling THMs in finished water at a low level,and the trend of THMs has changed from a yearly increase pattern before the program to a yearly decrease pattern after the program.关键词
饮用水/消毒副产物/三卤甲烷/中断时间序列/卫生干预措施Key words
drinking water/disinfection by-products/trihalomethanes/interrupted time series/sanitary intervention分类
医药卫生引用本文复制引用
任洋洋,钱海雷,裴赛峰,孙晓冬,吴筝,伍晨,周婧娴,杜爱民,隋少峰..应用中断时间序列方法评估干预措施对陆家嘴水厂出厂水三卤甲烷的影响[J].环境与职业医学,2024,41(4):420-424,5.基金项目
上海市加强公共卫生体系建设三年行动计划(2023-2025)重点学科项目(GWVI-11.1-39) （2023-2025）
上海市加强公共卫生体系建设三年行动计划(2023-2025)项目(GWVI-4) （2023-2025）
国家疾控局公共卫生人才培养支持项目(现场流行病学调查,无编号) （现场流行病学调查,无编号）
