焚烧灰中重金属溶出行为及水泥固化机理  

Leaching Behaviors of Heavy Metals in MSWI Fly Ash and the Immobilization Mechanism of Cement

作　　者：袁玲[1] 施惠生[1] 

机构地区：[1]同济大学混凝土材料研究国家重点实验室

出　　处：《建筑材料学报》2004年第1期76-80,共5页Journal of Building Materials

基　　金：国家自然科学基金资助项目(20277027);上海市重点学科建设项目;国家重点基础研究(973)发展规划项目(2001CB610705)

摘　　要：垃圾焚烧飞灰是生活垃圾焚烧后烟气除尘器收下的物质,因其中含有水浸出性的重金属物质而被认为是危险废物,必须对之进行稳定化处理.主要研究了焚烧飞灰中重金属物质的浸出问题,考察了水泥对焚烧飞灰中重金属物质固化的效果.研究表明,用水泥稳定固化焚烧飞灰中重金属物质的效果良好,重金属物质通过物理固封、替代或吸附等形式可固化进水泥水化产物结构中.MSWI fly ash is a residual that comes from scrubber after incineration of municipal solid wastes(MSWI), in which water leachable heavy metals are contained, so it is regarded as hazardous wastes and must be undergone a solidification or stabilization treatment before disposal. In this study the leachability of heavy metals in MSWI fly ash and cement solidification effect were studied. It is shown that cement immobilization effect of MSWI fly ash is good and heavy metals are immobilized within cement hydration products through either physical fixation, substitution or adsorption mechanisms.

关 键 词：生活垃圾 重金属 浸出毒性 焚烧灰 城市 重 水泥 固化 

分 类 号：X799.3[环境科学与工程—环境工程] TQ172.12[化学工程—水泥工业]