[Study on vitrification of fly ashes from municipal wastes incinerator with a plasma torch].
TCLP analysis (USEPA method 1311) was employed on fly ash in order to analyze the metals leachability and the concentration of cadmium was 0.3225 mg/L which exceeded state TCLP standard(0.3 mg/L). According to USEPA method 1613, I-TEQ of PCDD/Fs in fly ash was 0.45 ng/g. Then a double arcs DC plasma torch was developed to vitrified fly ash. And the results showed that heavy metals were mostly immobilized in the vitrified slag and also I-TEQ of PCDD/Fs in fly ash was destroyed near 91.6%. The morphology of vitrified slag was amorphous state which showed the glassy slag of SiO2 and the microstructure of slag was very compact.
Pan
Xin-chao
XC
State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China. panxinchao@126.com
Ma
Zeng-yi
ZY
Wang
Qin
Q
Tu
Xin
X
Yan
Jian-hua
JH
D000393:Air Pollutants / Q000032:analysis / Q000737:chemistry*; D000397:Air Pollution / Q000032:analysis / Q000517:prevention & control; D002244:Carbon / Q000032:analysis / Q000737:chemistry*; D002947:Cities; D060729:Coal Ash; D004784:Environmental Monitoring / Q000379:methods; D017745:Incineration / Q000379:methods*; D019216:Metals, Heavy / Q000032:analysis / Q000737:chemistry*; D052638:Particulate Matter / Q000032:analysis / Q000737:chemistry*; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives / Q000032:analysis / Q000737:chemistry
D000393:Air Pollutants; D060729:Coal Ash; D019216:Metals, Heavy; D052638:Particulate Matter; D000072317:Polychlorinated Dibenzodioxins; D002244:Carbon