摘要
为研究南四湖入湖河流水环境质量状况及风险程度,于2013年采集14条入湖河流的水样测定了化学需氧量(COD)、氨氮(NH_3-N)、总磷(TP)3种常规指标和Cr、As、Cd、Pb 4种重金属的含量。采用综合污染指数、层次分析法和风险熵评价了入湖河流水质污染程度、空间分布及重金属的风险等级。结果表明,14个监测断面污染最严重的为薛城大沙河、薛城小沙河、城郭河和老运河,综合污染指数分别为1.943、1.744、1.302和1.713,且TP污染突出。层次聚类的结果与之基本相符。重金属的风险熵评价结果显示,重金属铬(六价)、铅和砷的风险较低,而重金属镉有一定的风险。总体来说,南四湖入湖河流水质较好。
In order to study the water environment quality and risk of the main inflow rivers of Nansi Lake, water was sampled in fourteen inflow rivers in 2013. Three routine（COD, NH3-N and TP）indexes and the concentrations of 4 heavy metals（Cr, As, Cd and Pb）were analyzed. Water quality, spatial distribution characteristics and risk of heavy metals were assessed using a combination method of comprehensive pollution index, analytic hierarchy and risk quotient. The results are shown as follows： The most polluted rivers are Xuechengxiaosha river, Xuechengdasha river, Chengguo river and Laoyun river, whose values of comprehensive pollution index are 1.943, 1.744, 1.302 and 1.713, respectively; and attention should be paid to the pollution of TP. The resuh of analytic hierarchy agrees with the result of comprehensive pollution index. The result of risk quotient for heavy metals shows that the risks of Cr6＋, Pb and As are lower but Cd has a certain risk. The overall water quality of inflow rivers of Nansi Lake is good.
出处
《科技导报》
CAS
CSCD
北大核心
2017年第9期56-61,共6页
Science & Technology Review
基金
国家自然科学基金项目(41672340)
关键词
水环境
重金属
污染评价
空间分布
南四湖入湖河流
water environment
heavy metal
pollution assessment
spatial distribution
inflow rivers of Nansi Lake
作者简介
刘莹，硕士研究生，研究方向为水污染控制，电子信箱：2469048282@qq．com；
王炜亮（通信作者），副教授，研究方向为水污染控制，电子信箱：sunboyhood@163．com
