Na2SiO3 激发的磨细粒化高炉矿渣固化 MSWI 飞灰的强度、浸出性及微观结构表征
Strength, leachability and microstructure characterisation of Na2SiO3-activated ground granulated blast-furnace slag solidified MSWI fly ash.
作者信息
Zhang Dajie, Liu Wenshi, Hou Haobo, He Xinghua
机构信息
College of Resource and Environment, Wuhan University, NO. 129 Luoyu Road, Wuhan 430079, PR China.
出版信息
Waste Manag Res. 2007 Oct;25(5):402-7. doi: 10.1177/0734242X07075255.
The chemical composition and the leachability of heavy metals in municipal solid waste incinerator (MSWI) fly ash were measured and analysed. For the leachability of unstabilized MSWI fly ash it was found that the concentrations of Pb and Cr exceeded the leaching toxicity standard. Cementitious solidification of the MSWI fly ash by Na2SiO3-activated ground granulated blast-furnace slag (NS) was investigated. Results show that all solidified MSWI fly ash can meet the landfill standards after 28 days of curing. The heavy metals were immobilized within the hydration products such as C-S-H gel and ettringite through physical encapsulation, substitution, precipitation or adsorption mechanisms.
对城市生活垃圾焚烧（MSWI）飞灰中重金属的化学成分和浸出性进行了测定和分析。对于未稳定化的MSWI飞灰的浸出性，发现铅和铬的浓度超过了浸出毒性标准。研究了用硅酸钠活化的粒化高炉矿渣（NS）对MSWI飞灰进行水泥固化。结果表明，所有固化后的MSWI飞灰在养护28天后均可达到填埋标准。重金属通过物理包裹、替代、沉淀或吸附机制固定在水化产物如C-S-H凝胶和钙矾石中。
Zotero 插件