中国湘江流域长株潭段表层水质分析与潜在健康风险测评（英文）

Surface water quality and potential health risk assessments in Changsha-Zhuzhou-Xiangtan section of Xiangjiang River, China

长株潭城市群是重金属工业区,并且在湘江流域中属于严重受污染区域。本研究中的水质数据按月采自于2016年湘江流域长株潭段的18个采样点,其中包括7个主要金属元素(Pb,Hg,Cd,As,Zn,Cu,Se)以及相关水质参数(pH,DO,E.coli,CODMn,CODCr,BOD5,NH4+-N,TN,TP,F)。2016年也正是《湘江流域水污染综合整治实施方案》进行的第二个重要阶段。经数据调研发现,长株潭流域的主要污染物是大肠杆菌、总氮和总磷,该流域受重金属污染较轻微,而流域中的砷含量对当地居民尤其是儿童,存在一定的健康风险。同时,在污染源上,湘潭地区水质污染主要来自重金属污染,而株洲和长沙的水质污染主要来自于城市生活污染水中的其他污染物。

The Changsha-Xiangtan-Zhuzhou City Group is a heavy industrial district and accepted as the serious pollution area in the Xiangjiang River basin.In this study,7 metals(Pb,Hg,Cd,As,Zn,Cu and Se)and the river water quality parameters including pH,dissolved oxygen(DO),Escherichia coli(E.coli),potassium permanganate index(CODMn),dichromate oxidizability(CODCr),five-day biochemical oxygen demand(BOD5),ammonia nitrogen(NH4+-N),total nitrogen(TN),total phosphorus(TP)and fluoride(F)in 18 sampling sites of the Changsha-Xiangtan-Zhuzhou section are monthly monitored in 2016,which is the year to step into the second stage of the“Xiangjiang River Heavy Metal Pollution Control Implementation Plan”.It is found that E.coli,TN and TP are the main pollutants in the Changsha-Zhuzhou-Xiangtan section,and the pollution of heavy metal is not serious but As with potential risk to local people especially children should be concerned.In addition,Xiangtan city is mainly featured with heavy metal pollution,while Zhuzhou and Changsha city are both featured with other pollutants from municipal domestic sewage.