城市生活垃圾焚烧飞灰(MSWIFA)是城市生活垃圾焚烧产生的副产品之一,处理不当会导致严重的环境问题。采用MSWIFA部分替代水泥制备绿色水泥砂浆(GM)能够实现MSWIFA在建筑材料中的资源化利用。本工作主要研究不同替代率的MSWIFA对GM工作...城市生活垃圾焚烧飞灰(MSWIFA)是城市生活垃圾焚烧产生的副产品之一,处理不当会导致严重的环境问题。采用MSWIFA部分替代水泥制备绿色水泥砂浆(GM)能够实现MSWIFA在建筑材料中的资源化利用。本工作主要研究不同替代率的MSWIFA对GM工作性能、力学性能和耐久性能的影响。此外,本工作还表征了GM的微观孔结构和微观形貌。最后,本工作通过分析1 m 3GM的能耗、碳排放、生产成本,评估了MSWIFA替代水泥制备GM的经济、社会和生态效益。研究表明:(1)MSWIFA的掺入导致GM的抗折强度、抗压强度分别降低了10.54%~29.97%、18.74%~39.54%;(2)硅酸盐水泥可以固化MSWIFA,GM的重金属浸出满足国家规定限值;(3)当MSWIFA的替代率为15%时,1 m 3GM的能耗、碳排放、生产成本分别降低14.90%、14.63%、10.36%,而其工作性能、力学性能、耐久性依然能够满足建筑砂浆要求,表明采用MSWIFA制备GM能够实现该固体废弃物的资源化利用,具有巨大的经济、社会和生态效益。展开更多
X501 200502651 挪威卑尔根建筑材料中PCB污染源=Building ma- terials as a source of PCB pollution in Bergen,Norway [刊,英]/M.Andersson…∥Sci.Total Environ..- 2004,325(1/3).-139-144
To analyze the feasibility of utilization of thermal technology in fly ash treatment, thermal properties and microstructures of municipal solid waste incineration （MSW1） fly ash were studied by measuring the chemica...To analyze the feasibility of utilization of thermal technology in fly ash treatment, thermal properties and microstructures of municipal solid waste incineration （MSW1） fly ash were studied by measuring the chemical element composition, specific surface area, pore sizes, functional groups, TEM image, mineralogy and DSC-TG curves of raw and sintered fly ash specimens. The results show that MSWI fly ash particles mostly have irregular shapes and non-typical pore structure, and the supersonic treatment improves the pore structure; MSWI fly ash consists of Such crystals as SiO2, CaSO4 and silica-aluminates, and some soluble salts like KCl and NaCl. During the sintering process, mineralogy changes largely and novel solid solutions are produced gradually with the rise of temperature. Therefore, the utilization of a proper thermal technology not only destructs those persistent organic toxicants but also stabilizes hazardous heavy metals in MSWI fly ash.展开更多
文摘城市生活垃圾焚烧飞灰(MSWIFA)是城市生活垃圾焚烧产生的副产品之一,处理不当会导致严重的环境问题。采用MSWIFA部分替代水泥制备绿色水泥砂浆(GM)能够实现MSWIFA在建筑材料中的资源化利用。本工作主要研究不同替代率的MSWIFA对GM工作性能、力学性能和耐久性能的影响。此外,本工作还表征了GM的微观孔结构和微观形貌。最后,本工作通过分析1 m 3GM的能耗、碳排放、生产成本,评估了MSWIFA替代水泥制备GM的经济、社会和生态效益。研究表明:(1)MSWIFA的掺入导致GM的抗折强度、抗压强度分别降低了10.54%~29.97%、18.74%~39.54%;(2)硅酸盐水泥可以固化MSWIFA,GM的重金属浸出满足国家规定限值;(3)当MSWIFA的替代率为15%时,1 m 3GM的能耗、碳排放、生产成本分别降低14.90%、14.63%、10.36%,而其工作性能、力学性能、耐久性依然能够满足建筑砂浆要求,表明采用MSWIFA制备GM能够实现该固体废弃物的资源化利用,具有巨大的经济、社会和生态效益。
文摘X501 200502651 挪威卑尔根建筑材料中PCB污染源=Building ma- terials as a source of PCB pollution in Bergen,Norway [刊,英]/M.Andersson…∥Sci.Total Environ..- 2004,325(1/3).-139-144
基金Project(50808184) supported by the National Natural Science Foundation of China
文摘To analyze the feasibility of utilization of thermal technology in fly ash treatment, thermal properties and microstructures of municipal solid waste incineration （MSW1） fly ash were studied by measuring the chemical element composition, specific surface area, pore sizes, functional groups, TEM image, mineralogy and DSC-TG curves of raw and sintered fly ash specimens. The results show that MSWI fly ash particles mostly have irregular shapes and non-typical pore structure, and the supersonic treatment improves the pore structure; MSWI fly ash consists of Such crystals as SiO2, CaSO4 and silica-aluminates, and some soluble salts like KCl and NaCl. During the sintering process, mineralogy changes largely and novel solid solutions are produced gradually with the rise of temperature. Therefore, the utilization of a proper thermal technology not only destructs those persistent organic toxicants but also stabilizes hazardous heavy metals in MSWI fly ash.
