%0 Journal Article
%T Thermal Desorption Behavior of PCDD/Fs on the Fly Ash<br>飞灰中二英热脱附行为的研究
%A ZHANG Feng
%A ZHANG Hai-jun
%A CHEN Ji-ping
%A LIANG Xin-miao
%A <br>张峰
%A 张海军
%A 陈吉平
%A 梁鑫淼
%J 环境科学
%D 2008
%I 
%X The article studied the thermal desorption behavior of PCDD/Fs on the fly ash under anoxic conditions. From the analysis of the PCDD/Fs concentrations in the gas phrase and solid residual, the several kinds of potential chemical reaction and physical changes of dioxin that occur at the different temperature are concluded. At the same time, desorption ratios of 17 toxic dioxin congers and the better desorption conditions are studied. At 200 degrees C and 300 degrees C, the average desorption ratio of PCDD/Fs are 96.2% and 95.5% respectively. At 400 degrees C, the average desorption ratio of PCDD/Fs is 99.7%. The experiment results show that the PCDD/Fs is dechlorinated at 300 degrees C. At 400 degrees C, a lot of precursor reactions happen in the fly ash, which enhance the content of PCDD/Fs.
%K fly ash
%K PCDD/F
%K thermal desorption
%K TEQ<br>飞灰
%K 二噁英
%K 热脱附
%K 毒性当量
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=AD0E78E64785E3D3F715450FE82D3479&yid=67289AFF6305E306&vid=771469D9D58C34FF&iid=0B39A22176CE99FB&sid=20C3B205768D55E0&eid=652E7E360EBE3082&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=10