关键词: 垃圾焚烧飞灰, 螯合剂, 固化剂, 重金属浸出特性

Abstract: Aiming at the problem that the leaching of heavy metals from waste incineration fly ash was not conducive to the resource utilization and landfilling of fly ash，the byproduct of ethylene was used to synthesize an organic curing agent（BFS）with sulfonation reaction，and the effect of its synergistic effect of BFS and the chelating agent on the curing characteristics of fly ash was investigated. Meantime， the effects of environmental conditions，such as pH and temperature，on the leaching characteristics of heavy metals in fly ash were investigated. The experimental results showed that the addition of the curing agent BFS could significantly improve the curing characteristics of fly ash and inhibit the leaching of heavy metals，such as zinc，cadmium，chromium，and lead. The residual rate of heavy metals in fly ash increased firstly and then decreased with the increase of the loading of the curing agent BFS. The pH and temperature of the extracted liquid had an essential effect on the leaching of heavy metals in fly ash：the leaching characteristics of heavy metals，such as zinc，cadmium，chromium，and lead，were different under different pH conditions. Too high or low extract liquid temperature was not conducive to the stability of heavy metals in fly ash. In the experiment，the best extract liquid temperature was 35 ℃.

Key words: waste incineration fly ash, chelating agent, curing agent, leaching characteristics of heavy metal