摘要
以危险废物(70％工业废物+30％医疗废物)焚烧飞灰为研究对象,探讨了飞灰中重金属污染特性及其主要化学形态、浓度分布规律。初步得出以下结论：危险废物焚烧飞灰中主要污染重金属为Cd,Pb,Zn,其数量高于生活垃圾焚烧飞灰数倍,属于危险废物；飞灰中主要重金属以可溶及交换态、残留态、Fe-Mn氧化物结合态为主要化学形态,其中As,Cr,Cu比较稳定,而Cd,Pb,Zn易溶出进入环境；飞灰中Cd,Cu大体上呈易富集在小颗粒的趋势,Pb,Zn集中分布在50～125,125～250μm的两个粒级。
Fly ash samples from a hazardous waste incinerator burning 70 % industrial wastes and 30 % medical wastes were analyzed for heavy metals. The leaching toxicity, chemical form and concentration distribution of heavy metals were examined. The results suggested that Cd, Pb and Zn were the main heavy metals and the contents of those metals were as several times as those in fly ash from an MSW （municipal solid waste） incinerator. Heavy metals existed as exchangeable, bound to carbonates, metal oxides, organic matters and residual forms. In all heavy metals, Cd, Pb and Zn showed the higher leachability while As, Cr and Cu were more chemically steady. Cd and Cu mainly concentrated on small particles. Pb and Zn were enriched on 50-125μm and 125-250μm particles.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2006年第1期17-21,共5页
Journal of University of Science and Technology Beijing
基金
国家自然科学基金(No.20277024)国家"863"高科技项目(No.2002AA644010)归国人员基金
关键词
危险废物
飞灰
焚烧
重金属
hazardous wastes
fly ash
incineration
heavy metals
