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垃圾焚烧飞灰基本性质的研究
引用本文:王军,蒋建国,隋继超,郑鹏,杨士键,张妍. 垃圾焚烧飞灰基本性质的研究[J]. 环境科学, 2006, 27(11): 2283-2287
作者姓名:王军  蒋建国  隋继超  郑鹏  杨士键  张妍
作者单位:1. 清华大学环境科学与工程系,北京,100084
2. 清华大学环境科学与工程系,北京,100084;上海市环境科学研究院,上海,200233
基金项目:国家高技术研究发展计划(863)项目(2002AA644010)
摘    要:分析了几种焚烧飞灰的基本性质,讨论了燃烧过程中可能影响飞灰中重金属分布的因素,研究表明:焚烧飞灰结构复杂性和性质多变,其主要的化学组成为Cl、Ca、K、Na、Si、Al、O等,主要的重金属为Zn、Pb、Cr、Cu等;飞灰多以不规则的无定形态和多晶聚合体的结构存在,浸出毒性一般超过危险废物鉴别标准;重金属主要以气溶胶小颗粒和富集于飞灰颗粒表面的形式存在于飞灰中.焚烧厂和焚烧时间的变化对于飞灰性质有较大影响,几种飞灰的Cl含量范围为6.93%~29.18%,SiO2为4.48%~24.84%;浸出毒性则在0~163.10mg·L-1(Pb)、0.049~164.90mg·L-1(Zn)之间变化.

关 键 词:焚烧飞灰  重金属  挥发  浓缩
文章编号:0250-3301(2006)11-2283-05
收稿时间:2005-09-22
修稿时间:2005-09-222005-11-29

Fundamental Propertise of Fly Ash from Municipal Solid Waste Incineration
Wang Jun,Jiang Jian-Guo,Sui Ji-Chao,Yang Shi-Jian,Zhang Yan. Fundamental Propertise of Fly Ash from Municipal Solid Waste Incineration[J]. Chinese Journal of Environmental Science, 2006, 27(11): 2283-2287
Authors:Wang Jun  Jiang Jian-Guo  Sui Ji-Chao  Yang Shi-Jian  Zhang Yan
Affiliation:Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
Abstract:Fundamental properties and the factors that influence the distribution of heavy metals of several fly ashes are analyzed.Experiments indicate that the structures are complex and the properties are changeable.The study results show that the chemical composition is Cl,Ca,K,Na,Si,Al,O,etc,and heavy metals are Zn,Pb,Cr,Cu etc.The main structures of fly ash are irregularly amorphous forms and polycrystalline aggregates.Generally,the ieaching toxicity exceeds the ientification standard for hazardous wastes.Heavy metals are chiefly in the forms of tiny aerosol particles and aggregates on the surface of fly ash.The properties of fly ash are greatly influenced by the change of incinerators or the variation of incinerating time.The content of Cl ranges from 6.93% to 29.18%,while that of SiO2 does from 4.48% to 24.84%.The leaching toxicity varies between 0 and 163.10mg·L-1(Pb) and between 0.049 and 164.90mg·L-1(Zn).
Keywords:MSWI fly ash  heavy metals  volatilization  concentration
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