海口市生活垃圾焚烧飞灰特性与重金属形态分析研究

生活垃圾焚烧飞灰因富合多种毒性物质而被列入危险废物名录.不同地区生活垃圾焚烧飞灰元素组成存在差异.论文研究了海口市生活垃圾焚烧飞灰的基本特性及重金属形态.结果表明,飞灰中Pb浸出值超过危险废物判别值的6倍之多,Pb、Cd和Zn的浸出值均超过生活垃圾填埋场限值.与As和Hg相比,Cu、Zn、Cr、Pb和Cd碳酸盐结合态的比例略高,在酸性条件下极易释放,对周围环境构成威胁.

Study on Characteristics and Chemical Speciation of Heavy Metals from Municipal Solid Waste Incineration Flying Ash of Haikou

Flying ash from domestic waste incineration was listed in Municipal Solid Waste Incineration（MSWI） as a hazard- ous material because it contains many toxic substances. The fly ashes from different regions have different components. Basic characteristics and heavy metals chemical speciation of MSWI flying ash of Haikou were analyzed in this paper. The results showed that the leaching concentration of Pb in fly ash was 6 times more than state criteria of hazardous waste. The leaching con- centrations of Pb, Cd and Zn exceed the limit values of heavy metals in garbage land - filling. Compared with As and Hg, the car- bonates fraction of Cu, Zn, Cr, Pb and Cd were higher, which is easily released into the environment Under acidic condition and pose a threat to environment.