某城市排污河水质状况分析评价

以城市排污河道为研究对象,测定了表层沉积物中的重金属总量、水质常规指标及DBP和DEHP,采用改进的主成分分析法和等标有机污染指数分析对排污河污染状况进行分析评价。运用改进的主成分分析法找出了主要污染源和主要污染物。结果表明:不同排污口的主要污染物不同,B化工厂CODCr及pH值为主要污染物;C泵站污染严重的为CODCr,pH值和TP;D排污口主要污染物为CODCr,NH3-N,Cr和pH值;E化工厂的主要污染物为CODCr,NH3-N和Cd。D排污口是第一主成分的主要污染源点,B化工厂无论是DBP等标污染指数还是DEHP等标污染指数均明显高于其他排污口,是A排污河PAEs污染的主要污染源。

Water quality assessment of some city drainage river

The A drainage river in Tianjin is studied.The pollutants in the surface layer of the river sediment is measured,including heavy metals,water quality indexes,DBP and DEHP,by improved principal component analysis method and organic pollution index method.The experimental results show that:(1) The main pollutants of each outfall is different,for example,the B chemical plant’ main pollutants are CODCr and pH;the C pump station’s main pollutants are TP,CODCr and pH;the D outlet’s main pollutants are CODcr,NH3-N,Cr and pH;the E chemical plant’s main pollutants are CODCr,NH3-N and Cd.(2)D outfall is the main source of the first component.(3) the DBP and DEHP of B chemical plant are significantly higher than that of other outfalls,which are the main source of PAEs of A drainage river.