大冶市罗桥东港渠水体中Cd、Pb、As等重金属污染调查

Survey of Cd,PB and As Pollution in the Water of Donggangqu Trench in Luoqiao,Daye City

对大冶有色冶炼厂主要排污渠东港渠水体调查表明:①东港渠渠水由于受冶炼厂排污影响,渠水中Cd、Pb、As等重金属含量明显增加,往下游渠水中重金属含量呈现减弱的趋势,但大冶湖水中的As含量仍然超出渔业标准4倍多,原排污渠西港渠在停止排污后,渠水重金属含量明显下降,已趋于农田灌溉标准;②粉尘、底泥及矿渣样品中Cd、Pb、As含量均超出危险废物鉴别标准,其中排污渠底泥中重金属含量最高,说明冶炼厂排出的废水中带出的重金属为“三废”之最,对污染的影响最大。

The investigation of the water of Donggangqu Trench, a major drainage of Daye Smeltery, shows two points. First, the content of Cd, Pb and As in the water has apparently increased. Though the content of heavy metals shows the weakening trend in the lower part of trench, As content in Daye Lake is still 4 times higher than the background value. When Xigangqu, the original drainage, stopped the pollu- tion draining, the content of heavy metals in the trench has greatly decreased and the water can be used for irrigation, Second, the content of Cd, Pb and As in the samples of soot, sediment and scoria transcends the identification standard of hazardous wastes and this indicates that the heavy metals in the wastewater from the smeltery have the worst effect on the water pollution.