TiO_2光催化降解垃圾焚烧炉飞灰中二噁英的实验研究  

Experimental Study on TiO_2 Photocatalytic Degradation of Dioxins in MSW Fly Ash

作　　者：徐旭[1] 陈彤[1] 严建华[2] 池涌[2] 岑可法[2] 

机构地区：[1]中国计量学院计量技术工程学院,杭州310018 [2]浙江大学热能工程研究所能源洁净利用国家重点实验室,杭州310027

出　　处：《环境保护科学》2007年第5期1-3,16,共4页Environmental Protection Science

基　　金：国家重点基础研究发展规划资助项目(G1999022211);浙江省教育厅资助项目(20030019);浙江省自然科学基金(Z505011)

摘　　要：光催化降解有机污染物是目前环保研究的热点课题。本文以垃圾焚烧炉的飞灰为对象,研究TiO2作为催化剂在500w汞灯照射下,飞灰中二噁英的随光照时间的降解效率。实验结果表明:在一定的光照条件下,TiO2光催化氧化分解二噁英的效率与飞灰本身的特性有关,特别是与飞灰含碳量以及铁等金属含量有关。飞灰中铁、铜等金属元素可促进二噁英光解,而碳则抑制了二噁英的光解。The research on removing the pollution of organic contaminations by photocatalytic degradation in the environment is a hot subject. In this paper, the photocatalytic degradation of PCDD/Fs in MSW fly ash is investigated. Under the condition of 500W mercury lighting, the degradation efficiencies of dioxin in fly ash varied by time with TiO2 photo catalyst are studied. The conclusion of experimental study shows that the efficiency of degradation relates to the characters of fly ash, especially the content of carbon and metal in fly ash, such as iron and copper. The analysis result illustrate that degradation of PCDD/Fs in fly ash can be improved by the element of iron or copper, but may be restrained by carbon.

关 键 词：垃圾焚烧飞灰 光催化降解 二噁英 

分 类 号：X703[环境科学与工程—环境工程]