煤基化工厂污泥的重金属含量及浸出毒性测定分析

Analysis on Determination of Heavy Metal Content and Leaching Toxicity in Sludge from Coal-based Chemical Plants

乌鲁木齐市某煤基化工厂配套建有污水处理厂,其采用生化处理装置对污泥进行脱水干燥。根据该污水处理厂的实际生产情况,本文采用我国现行固体废物重金属含量和浸出毒性鉴别程序,对其脱水干燥的污泥样品进行特性分析。结果表明,污泥样品中重金属的总含量过高,其中铜、锌、铅等都远超标准限值;样品中重金属的浸出率较低,低于标准限值。

A coal-based chemical plant in Urumqi is equipped with a sewage treatment plant,which uses a biochemical treatment device to dehydrate and dry the sludge.According to the actual production situation of the sewage treatment plant,this paper uses the current identification procedures of heavy metal content and leaching toxicity of solid waste in China to analyze the characteristics of its dehydrated and dried sludge samples.The results showes that the total content of heavy metals in the sludge samples is too high,among which copper,zinc,lead,etc.far exceed the standard limit;the leaching rate of heavy metals in the sample is low,which is lower than the standard limit.