Study on Environmental Safety of Thermal Treatment of MSWI Fly Ash

摘要：

MSWI fly ash requires safe handling due to existence of heavy metals which pose potential threat to people’s health and the environment. In this work, the fly ash went through thermal treatment at different temperatures, and its environmental safety was studied by means of leaching toxicity and specification analysis of heavy metals in sintered fly ash and volatilization analysis of heavy metals during the treatment process. It is found that between 400 and 1,200 ℃ , increase of temperature is conducive to stabilization of Zn, Cu, Pb, Cd, Ni, As and Hg. However, increase of temperature, between 900 ℃ and 1200 ℃, facilitates leaching of Cr into the environment. Leaching toxicity of heavy metals meet requi ℃ rements of the relevant standard on environment safety only when the sintering temperature is no lower than 1100. Waste gas from the treatment process contains a lot of volatilized Hg, Pb, As, Cd and Zn, and ℃ thus requires further safe handling.

关键词： MSWI fly ash thermal treatment heavy metals environmental risk leaching tozicity specification analysis

作者: ZHANG Haiying ZHENG Yi ZHAO Youcai QI Jingyu

作者单位: Shanghai Institute of Technology,Shanghai 200235,China the State Key Laboratory of Pollution Control Shanghai Institute of Technology,Shanghai 200235,China State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Shanghai 200092,China Sch. of Marine Geol. and Greophys,Tongji University,Shanghai 200092,China

会议类型: 国际会议

会议名称: 2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)

会议地点: 上海

会议语种:英文

页码: 2263-2267

在线出版日期: 2009-06-02（万方平台首次上网日期，不代表论文的发表时间）