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选用抚顺市生活垃圾作为堆肥原料,在控制条件下进行好氧堆肥试验,研究生活垃圾中重金属在堆肥过程中形态的变化。结果表明,堆肥处理不能降低生活垃圾中重金属总量,但影响重金属的形态。铁锰氧化物结合态Cd的比例提高8.7%;有机结合态Cr的比例提高26.7%;残渣态Hg、Pb和As的比例有所上升;稳定形态Hg、Pb、Cr、As的比例上升。研究结果对生活垃圾堆肥化处理的重金属环境安全性具有指导意义。
Fushun municipal solid waste was selected as raw material for compost, aerobic composting was conducted under controlled conditions to study the changes of heavy metals in municipal solid waste in composting process. The results showed that composting treatment can not reduce the total amount of heavy metals in municipal solid waste, but affect the form of heavy metals. The proportion of Fe-Mn-bound Cd increased by 8.7%, the proportion of organic-bound Cr increased by 26.7%, the proportion of Hg, Pb and As increased and the proportion of stable Hg, Pb, Cr and As increased. The research results are instructive for the environmental safety of heavy metal composting treatment of municipal solid waste.