重庆某电厂灰渣中痕量金属元素形态分布研究

本文以某电厂飞灰和灰渣为研究对象，采用Tessier逐级提取分离方法，对零粒物中痕量重金属元素的含量和形态分布进行了研究。结果表明，飞灰中痕量金属元素Hg、As、Co和Cu的含量高于底灰，而Pb、Cd、和Cr的含量则是底灰高于飞灰；五中形态测定值的和与总量测定值基本相当；在煤燃烧形成的飞灰和灰渣中，痕量金属元素主要以稳定态的形式存在，其它形态的含量则比较低。

Study on the Speciation Distribution of Heavy Metals in Coal Ash and Cinder of in Power Plant in Chongqing

Tessier sequential method was used to the studies of speciation distribution of heavy metals in coal ash and cinder from coal combustion in a power plant in Chongqing.The results indicated that:in coal ash,the concentration of Hg?As?Co?and Cu is higher than that in coal cinder,while the concentration of Pb?Cd and Cr is higher in cinder.The summary of the five speciation of the measured heavy metals is very closed to the total amount,and the most part of the heavy metals maintained in the ash and cinder is stable.