摘要
测定了飞灰的主要组成成分和重金属元素含量。生活垃圾焚烧飞灰在2年期的自然堆存下,通过分析不同时期污染物浸出特性,以研究飞灰污染物自然老化特征。结果表明:飞灰的主要组成元素有Ca、Si、Al、S、K、Na、Fe、Mg和Cl等,其重金属元素含量大约占1%。飞灰自然老化后,Pb、Zn、Cr6+、Hg和氰化物的迁移性大大降低;Cu、As和Cd变化不明显,Cr的浸出略有增加;飞灰中的重金属元素在低pH下仍不具有长期稳定性,因而具有较大的环境风险。
Key components and heavy metal concentrations of fly ash were measured. Under a two-year natural pileup of fly ash from incinerator for domestic solid wastes, the natural aging features of pollutants were studied by analyzing the leaching characters of pollutants in the different periods. The results indicates that the main elements of fly ash were Ca, Si, Al, S, K, Na, Fe, Mg, Cl,et al, in which the amount of the heavy metal was about 1%. It also shows that after a natural aging of fly ash,the movability of Pb,Zn, Cr^6 ＋ , Hg and cyanide decreased significantly, the movability of Cu, As and Cd creased slightly. The results also suggest that the heavy and have a potential risk to the environment. was not obviously changed and the leaching of Cr inmetals have no long-term stability under low pH values
出处
《环境工程学报》
CAS
CSCD
北大核心
2009年第6期1123-1126,共4页
Chinese Journal of Environmental Engineering
关键词
生活垃圾
飞灰
自然堆存
浸出毒性
municipal solid waste
fly ash
naturally pileup
leaching toxicity
