Tozicity Analysis of Municipal Solid Waste Incineration (MSWI) fly ash
MSWI fly ash requires safe handling due to existence of heavy metals which pose potential threat to peoples health and the environment. In this work, its toxicity was studied by means of leaching toxicity, specification analysis and volatilization analysis of heavy metals in fly ash. It is found that leaching toxicity of Hg, Cd, Zn and Pb exceeds the limit in accordance with the HVEP and ALT standards. Acid soluble forms of Cd, Cu, Ni, Pb and Zn all exceed 20％, and consequently they pose potential threat to the environment where acids exist. In addition, volatility of heavy metals decreases as: Hg>Pb>Cd, As>Zn>Cr,Ni,Cu. It is easy for Hg, Pb, As and Cd to volatilize, which fly away almost entirely at 1150℃. It is relatively difficult for Zn to volatilize, 40％～50％ of which flies away at 1150℃, and it is difficult for Cr, Ni and Cu to volatilize, volatilization rates of which are less than 10％.
MSWI fly ash heavy metals tozicity analysis leaching tozicity specification analysis volatilization analysis
Zhang Haiying Zhao Youcai
Department of Chemical Engineering Shanghai Institute of Technology Shanghai,China The State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai,China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）