%0 Journal Article
%T Photochemical Degradation of Petroleum on Soil Surfaces Under Simulated Visible Light<br>模拟可见光下土壤表面石油的光化学降解研究
%A LI Zhi-dong
%A ZHAO Ya-zhi
%A QUAN Xie
%A CHEN Shuo
%A <br>李智冬
%A 赵雅芝
%A 全燮
%A 陈硕
%J 环境科学
%D 2007
%I 
%X The factors influencing photochemical degradation of petroleum on soil surfaces under simulated visible light, such as the initial oil concentrations, soil types and pH, were investigated. The concentrations of petroleum in photolytic processes were analyzed by UV-Vis. GC-FID and FTIR were used for the characterization of petroleum hydrocarbons. Experimental results indicated that photochemical degradation of petroleum on soil surfaces followed pseudo first-order kinetics with the rate constant of 0.0026~0.0172 h-1and half-life of 40~267 h. GC-FID analysis showed that, after 50 h of irradiation, the content of saturated hydrocarbons with longer chain decreased, while the proportion of shorter chain ones increased slightly; in addition, most chromatogram peaks of aromatics weakened or disappeared. After 60 h of photolysis, the appearance of carbonyl compounds in FTIR spectra of the extract from soil demonstrated that petroleum was gradually oxidized in the photolytic process.
%K simulated visible light
%K petroleum
%K soil surfaces
%K photochemical degradation<br>模拟可见光
%K 石油
%K 土壤表面
%K 光化学降解
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=C8EB3D79055354C1&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=9CF7A0430CBB2DFD&sid=E1A8B116B8F72D84&eid=287DFAEA599AEAB7&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=20