垃圾焚烧飞灰中砷的污染特性研究  

Pollution Characteristics of Arsenic in Municipal Solid Waste Incineration Flying Ash

作　　者：丁世敏[1,2] 刘玉兰[1] 封享华[1] 王里奥[2] 胡武洪[1] 

机构地区：[1]重庆长江师范学院化学及环境科学系,重庆408100 [2]重庆大学资源与环境学院,重庆400000

出　　处：《河南师范大学学报（自然科学版）》2009年第1期102-105,共4页Journal of Henan Normal University(Natural Science Edition)

基　　金：教育部春晖计划项目(Z2005-1-55005);重庆市教委科研项目(KJ061303)

摘　　要：研究了重庆垃圾焚烧飞灰中砷的污染特性:包括不同粒径下砷的分布特征,砷的浸出毒性,不同浸出时间、液固比和碱度下的浸出规律,及砷的可交换态、碳酸盐结合态、Fe-Mn结合态、有机物吸附态、残渣态五个不同化学元素形态的含量.结果表明粒径在38～250μm范围内的飞灰中砷的含量较高.飞灰没有砷浸出毒性,但砷的浸出与环境条件密切相关:在酸性条件下几乎不浸出,而在碱性条件下较易浸出.形态分析表明砷的有机物吸附态和Fe-Mn结合态含量较高,残渣态含量相对较低,而可交换态及碳酸盐结合态未被检出.The pollution characteristics of arsenic in flying ash from Municipal Solid Waste Incineration （MSWI） in Chongqing are investigated, which include the distribution characters of arsenic with different particle size, the leaching toxicity and leaching characteristics of arsenic with different impact factor such as the different time, the different ratio of liquid to solid and the different acidity or alkalinity, the speciation of arsenic including the form of exchangeable, carbonate, organic adsorption, Fe-Mn bound and residue. The results show that the content of arsenic in the flying ash is higher within the particle size of 38-250 μm. The flying ash has no leaching toxicity. But the leaching of arsenic has a close relationship with environmental conditions： under the acidic conditions there is hardly leaching, while the leaching is easier under the alkaline conditions. In the analysis about the speciation of arsenic, the content of arsenic of organic adsorption form and Fe-Mn bound form is relatively higher, the state of residue is relatively lower, while exchangeable form and carbonate form are not detected.

关 键 词：垃圾焚烧飞灰 砷 分布特性 形态分析 浸出特性 

分 类 号：X131[环境科学与工程—环境科学] O614[理学—无机化学]