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《Chinese Journal of Analytical Chemistry》 2012-11
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Variation Characteristics of 3D-Excition Emission Matrix Fluorescence Spectra of Dissolved Organic Matter from Landfill Leachate during Photocatalytic Degradation

JIA Chen-Zhong~(*1),WANG Yan-Xing~2,ZHANG Cai-Xiang~2 1(College of Chemical and Environmental Engineering,Yangtze University,Jingzhou 434023,China) 2(State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences,Wuhan 430074,China)  
Three-dimensional excitation emission matrix fluorescence spectroscopy(3D-EEMs) was applied to analyze the variation characteristics of dissolved organic matter(DOM) six fractions in landfill leachate during photocatalytic degradation.The results showed that fluorescence spectroscopy of hydrophobic acids(HOA),hydrophobic bases(HOB),hydrophobic neutral traction(HIB), hydrophobic neutral fraction(HON) and hydrophilic neutral fraction(HIN) changed considerably, and that of HIA was relatively steady during photocatalytic process.In general,fluorescence peaks of humic acids-like had the most significant change during photocatalytic treatment process,and disappeared entirely after 60 h treatment,which implied that humic acids-like can be degraded preferentially.In 72 h effluent,VIS fulvic-like,tryptophan-like and tyrosine-like were residual in the fluorescence regions,and the last two were predominant fractions.These results indicated that macromolecular fulvic-like and humic acids-like can be degraded into micro-molecular protein-like matters.
【Fund】: 国家自然科学基金项目(No.40972156);; 中国地质大学(武汉)生物地质与环境地质教育部重点实验室开放项目(No.BGEGF200820);; 长江大学博士科研启动基金项目资助
【CateGory Index】: X703
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