探究生活垃圾焚烧飞灰中氯对铅、镉浸出毒性影响

To Study the Effect of Chlorine on Lead and Cadmium Leaching Toxicity in Fly Ash of Domestic Waste Incineration

通过对18个不同区域飞灰进行半定量分析、定量分析、浸出毒性分析,探究飞灰中氯对铅、镉浸出毒性的影响。结果表明:飞灰中的主要元素为Ca、Al、Si、Na、Cl,重金属含量较多的为Pb、Zn、Cu,我国生活垃圾焚烧飞灰中氯含量为6.55%~16.8%,不同地区飞灰中氯含量差异性比较明显;原灰中氯含量和浸出液中铅、镉含量之间无明显关系,浸出液中氯含量和浸出液中铅、镉含量之间无明显关系。

The effects of chlorine in fly ash on lead and cadmium leaching toxicity were investigated by semi-quantitative analysis,quantitative analysis and leaching toxicity analysis of fly ash from 18 different areas.The results show that the main elements in fly ash are Ca,Al,Si,Na and Cl,and the heavy metals are Pb,Zn and Cu.The chlorine content in fly ash from domestic solid waste incineration is 6.55%~16.8%,and the difference of chlorine content in fly ash from different regions is obvious.There is no obvious relationship between the chlorine content in raw ash and the lead and cadmium content in the leaching solution,and there is no obvious relationship between the chlorine content in the leaching solution and the lead and cadmium content in the leaching solution.