垃圾焚烧飞灰中重金属分布特征研究  

Heavy Metals Distribution Characteristics Reseach in Municipal Solid Waste Incineration Flying Ash

作　　者：丁世敏[1,2] 谢金萍[1] 封享华[1] 

机构地区：[1]长江师范学院化学及环境科学系,重庆408100 [2]重庆大学资源与环境学院,重庆400000

出　　处：《工业安全与环保》2010年第2期20-23,共4页Industrial Safety and Environmental Protection

基　　金：重庆市教委科研项目(KJ061303);国家教育部春晖计划项目(Z2005-1-55005)

摘　　要：以三峡库区垃圾焚烧飞灰为研究对象,研究了飞灰的粒径分布特征、重金属含量及不同粒径下重金属的分布特征。四季飞灰在粒径分布上有相似的规律:<250μm的飞灰占飞灰总量的90%以上,含量最高的是粒径范围处于37-75μm的飞灰;飞灰中不同重金属含量差异很大;飞灰中重金属含量具有季节性差异;不同粒径下重金属含量不同,除Zn外,Cd、Cu、Mn、Pb、Cr基本上符合随飞灰粒径减小重金属含量增大的规律。与国内其他城市飞灰进行比较,库区飞灰中Cd、Mn、Pb的含量相对较高,但Zn的含量却最低。飞灰中各种重金属含量远远超过库区土壤背景值,亦超过国家土壤环境质量二级标准。This paper conducts studies on the particle size distribution characteristics, heavy- metal content end heavy - metal distribution characteristics under various particle sizes of Chengqing municipal solid waste incineration （MSWI） flying ash. The particle size distribution law of flying ash of four different seasons is similar： the flying ash under the size of 250 μm occupies over 90% of the total flying ash end the particle size between 37 - 75μm is the most common size; the content of each heavy metal is very different; the heavy metal content of flying ash in four seasons is different; the distribution of heavy metal in different size ash particles is different, and except Zn, the concentration of other heavy metals increases with the decrease of particle size. Compared with that of other cities, the contents of Cd, Mn, Pb are highcr in the flying ash of Chongqing while that of Zn is lower. Heavy metals content in flying ash exceeds heavy metals background value in the soils of Chongqing and also exceeds the national environmental quality standards for soils.

关 键 词：垃圾焚烧飞灰 重金属 粒径 分布特性 

分 类 号：X513[环境科学与工程—环境工程]