摘要
【目的】以广西龙江河水体为研究对象,对龙江河地表水体中As、Cd、Zn、Pb、Cu等重金属污染物含量进行分析测定,以阐明龙江河水体重金属污染物的分布特征和风险水平。【方法】运用内梅罗综合指数法、健康风险评价模型对龙江河水质等级和水体中重金属引起的健康风险水平进行评价。【结果】各采样点的重金属含量均符合Ⅱ类水质标准,龙江河13个采样点水质均属重金属未污染状态,水质清洁。龙江河重金属As和Zn的健康风险值大于Cd、Pb、Cu的健康风险值,但均低于最大可接受风险水平5.0×10^(-5) a^(-1)。【结论】龙江河水体重金属综合污染指数与健康风险值所反映的水质状况规律一致,均表现为中下游较上游的结果要稍高一些。As是龙江河水环境产生健康风险的主要污染物质,应该作为龙江河水环境风险管理的重点对象。
【Objective】The purpose of this research is to investigate the quality of the water bodyof the Longjiang River in Guangxi.Concentrations of heavy metals As?Cd?Zn,Pb and Cu in thewater surface of Longjiang River were analyzed to figure out the distribution characteristics ofheavy metal pollutants in this area.[M ethodslThe Nemero comprehensive index method andthe health risk assessment model were adopted to evaluate the grade of water quality ofLongjiang River and the health risk level imposed by heavy metals in the w ater.【Results】The concentrations of heavy metals in each samplingpoint conform to grade II according to waterquality standards.The water samples collectedon13sampling points of the Longjiang River areclean and not polluted by heavy metals.Thehealth risk values of heavy metals As and Zn aregreater than that of Cd,P b,and Cu in theLongjiang River,but still lower than the maximumacceptable risk level of5.0X10-5a-1.【Conclusion】T h e disciplinarian of the h e a v y metals distribution in the Longjiang River revealsthat the d o w n s t r e a m of the river possessed slightly higher values than the u p s t r e a m9w h i c h isconsistent per the c o m p r e h e n s i v e pollution index a n d the health risk value.A s is the ma j o r pollutantof the health risk of Longjiang R i v e r,and it should be regarded as the k e y object of environme n t a l risk m a n a g e m e n t of Longjiang River.
作者
卢秋
邓渠成
卢苇
黄勇
邓超冰
王晓飞
王云龙
LU Qiu;DENG Qucheng;LU Wei;HUANG Yong;DENG Chaobing;WANG Xiaofei;WAMG Yunlong(School of Chemistry and Chemical Engineering, Guangxi U niversity,Nanning,Guangxi,530004 , China;School of Geography, Planning and Environmental Management ,The University of Queensland,Brisbane,QLD,4072,A ustralia;Guangxi Zhuang Autonomous Region Prefecture Environmental Monitoring Centre,Nanning,Guangxi,530028,China)
出处
《广西科学》
CAS
2016年第5期478-484,共7页
Guangxi Sciences
基金
广西自然科学基金重大项目“西江流域水环境重金属污染机制与调控”(2013GXNSFEA053001)资助
关键词
龙江河
重金属
内梅罗指数
法健康风险评价
Longjiang River
heavy metals
Nemero comprehensive index method
health risks
