摘要
进口废电器拆解后的残余固体废物是一种碱性废物 ,2— 3年雨量范围内的模拟酸雨淋出液中的Cu和Zn的含量超过排放标准中的一级排放标准 ,而Ni、Pb、Hg的含量可以达标 ;在整个 10年试验雨量范围内 ,所有淋出液中CODCr和油的含量均超过一级排放标准 .酸性介质有利于Cu、Zn、Pb、Ni的释放 .碱性介质有利于油和CODCr的释放 .在各种淋溶介质条件下 ,主要污染因子的淋溶释放一般符合Ct=C0 ·tb 模型 .
The remained solid waste of disassembled import waste electrical equipment is of alkaline. concentrations of Cu and Zn in leachate solution exceeded that of first standards in discharge standards under modeling acid rain leaching conditions less than 2 to 3 years' rainfall, but concentration of Ni ,Pb and Hg in leachate solution were generally lower than that of first standards; COD Cr and oil concentrations were always more than that of the first standards during the whole experiment. Cu,Zn,Pb andNi in the solid waste were readily released in acid medium ,especially when pH of leaching solution equals 3 0 and liquid/solid was more than 8,concentrations of Zn , Ni and Pb in leachate solution rapidly increased,and reached to 180 mg/L,3 2mg/Land 0 532mg/L respectively until the end of the leaching study; COD Cr and oil are readily released in alkaline medium. The leachation of main pollutants generally follows following equation under great majority conditions: C t=C 0·t b.
出处
《环境科学学报》
CAS
CSCD
北大核心
2001年第3期382-384,共3页
Acta Scientiae Circumstantiae
基金
浙江省环保局科技计划项目! (编号 :9817)
