农业环境科学学报2012，Vol.31Issue(6)：1217-1222,6.
白洋淀沉积物中溶解有机质荧光特性及其与铜的相互作用
Fluorescence Characteristics of Dissolved Organic Matter and Interaction Between Cu( Ⅱ ) and DOM in Sediments of Baiyangdian Lake, China
摘要
Abstract
Fluorescence spectrum technique has advantages of high sensitivity, and quick-and-easy detection and has widely applied to characterize the dissolved organic matter(DOM). For better understanding the fluorescence characteristics of DOM in Baiyangdian Lake of China, fluorescence emission spectroscopy and three-dimensional excitation emission matrix fluorescence spectroscopy( 3DEEM) were used. Fluorescence quenching titration and 'HNMR were used to investigate the interaction between Cu( Ⅱ ) and DOM. The 'HNMR results showed that DOM in Baiyangdian Lake was mainly composed of large amount of carbohydrate. In fluorescence spectra obtained in this study, two fill— vic acid-like fluorescence peaks(peak A and peak C) and protein-like (peak B) were observed. Compared with visible fulvie-like, protein-like fluorescence intensity was high. The intensity for individual peak A, B and C decreases as concentrations of Cu( Ⅱ ) increase. DOM-Cu( H ) complexation constants and 'HNMR suggested that the fluorescent groups interact more strongly with Cu( Ⅱ ).关键词
沉积物/溶解有机质/三维荧光光谱/核磁共振Key words
sediment/ dissolved organic matter/ three-dimensional excitation emission matrix fluorescence spectroscopy/ 'HNMR分类
资源环境引用本文复制引用
赵萱,成杰民..白洋淀沉积物中溶解有机质荧光特性及其与铜的相互作用[J].农业环境科学学报,2012,31(6):1217-1222,6.基金项目
国家重点基础研究发展计划(973)项目“湖泊水环境质量演变与水环境基准研究”(2008CR418200) （973）
