Diopside-based glass-ceramics from MSW fly ash and bottom ash.
By utilising MSW fly ash from the Shanghai Yuqiao municipal solid waste (MSW) incineration plant as the main raw material, diopside-based glass-ceramics were successfully synthesized in the laboratory by combining SiO(2), MgO and Al(2)O(3) or bottom ash as conditioner of the chemical compositions and TiO(2) as the nucleation agent. The optimum procedure for the glass-ceramics is as follows: melting at 1500 degrees C for 30 min, nucleating at 730 degrees C for 90 min, and crystallization at 880 degrees C for 10h. It has been shown that the diopside-based glass-ceramics made from MSW fly ash have a strong fixing capacity for heavy metals such as lead (Pb), chromium (Cr), cadmium (Cd) etc.
School of Environment Engineering, Shanghai University, No. 149 Yangchang Road, Shanghai 200072, China. grqian@mail.shu.edu.cn
Guangren
G
Qian
Yu
Y
Song
Cangang
C
Zhang
Yuqin
Y
Xia
Houhu
H
Zhang
Pengcheong
P
Chui
D002244:Carbon / Q000032:analysis / Q000737:chemistry*; D002516:Ceramics / Q000138:chemical synthesis / Q000737:chemistry*; D060729:Coal Ash; D003247:Conservation of Natural Resources / Q000379:methods; D003460:Crystallization; D017745:Incineration; D052638:Particulate Matter / Q000032:analysis / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods; D012824:Silicic Acid / Q000737:chemistry*; D044366:Transition Temperature
D060729:Coal Ash; D052638:Particulate Matter; D012824:Silicic Acid; C074224:diopside; D002244:Carbon; C023506:Glass ceramics