烟台市污水处理厂污泥中重金属的形态分析  

Analysis on the Forms of Heavy Metals in the Sludge of Yantai Wastewater Treatment Plant

作　　者：刘英霞[1] 杨启霞[1] 常显波[1] 

机构地区：[1]烟台大学环境与材料工程学院,山东烟台264005

出　　处：《安徽农业科学》2008年第27期11977-11978,11984,共3页Journal of Anhui Agricultural Sciences

摘　　要：以烟台市城市污水处理厂的污泥为研究对象,测定了污泥中重金属(Cu、Zn、Pb、Cd、Cr、Hg)的总量和各存在形态的含量,并对各存在形态进行了分析。结果发现:污泥中的重金属除Cd和Cu外,总量符合《城镇污水处理厂污染物排放标准》(GB18918-2002)中污泥农用时污染物控制标准中的酸性限值。其中毒性较大的Pb、Cd、Hg、Cu多以稳定的残渣态和硫化物及有机结合态存在,不易迁移到环境中去。Zn、Cr多以铁锰氧化物结合态存在,分别占总量的79%和47%,对生物有潜在有效性。上述6种重金属可交换的离子态、碳酸盐结合态都很少,可以在pH>6.5的土壤中施用,但要加强对重金属污染源的控制和对施用土壤的监管。With the sludge from the municipal wastewater treatment plant of Yantai as the research objects,total amount of heavy metals（Cu,Zn,Pb,Cd,Cr,Hg） in the sludge and each content of different existing forms were determined.And each existing form was analyzed.The results showed that the total amount of heavy metals（excepting Cd and Cu） in the sludge accorded with the acidity limit value in the pollutant control standards in the agricultural sludge in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant（GB18918-2002）.Pb,Cd,Hg and Cu with greater toxicity mainly existed in stable residual forms and the form of sulfide and organic binding state,which were not easy to transfer into the environment.Zn and Cr mostly existed in the form of oxide compounds of iron and manganese,occupying 79% and 47% of the total content respectively.Zn and Cr had potential validity on biology.The above six kinds of heavy metals were few in the exchangeable ion form and the binding form of carbonate,which could be applied in the soil with pH value of more than 6.5.The control of heavy metals pollution sources and the monitor of the application soil should be strengthened.

关 键 词：污泥 重金属 形态分析 

分 类 号：X132[环境科学与工程—环境科学]