嘉陵江重庆段DOM三维荧光光谱的平行因子分析

应用平行因子分析法对2010年6月嘉陵江重庆段水体13个取样点DOM(溶解性有机质)的三维荧光光谱进行指纹识别.结果表明,嘉陵江重庆段水体可识别出4类5个荧光组分,包括类富里酸荧光组分C1(250、320 nm/400 nm)和C4(230、340nm/450 nm)、类腐殖酸荧光组分C2(260、360 nm/450 nm)、浮游生物产生的荧光组分C3(260 nm/380 nm)和类蛋白物质荧光组分C5(280 nm/330 nm).它们的贡献率依次为类富里酸18%～38%,类腐殖酸11%～18%,浮游植物8%～22%,类蛋白物质33%～49%.嘉陵江重庆段水体的有机物污染主要以来自工业、生活污水和其他人为活动产生的陆源污染输入为主,其次是浮游植物和水体微生物代谢产生的污染.13个取样点的总荧光强度在空间分布上由西到东呈"升高—降低—升高—降低"的趋势. 

Parallel Factor Analysis with EEM on Dissolved Organic Matter in Chongqing Section of Jialing River

Parallel factor analysis was used to extract the fingerprint features of the Excitation-Emission Matrix Spectrum of dissolved organic matter in water collected from 13 sampling sites in the Chongqing Section of the Jialing River in June 2010.Five separate fluorescent components in four categories were identified,including two fulic-like components(C1:250,320 nm/400 nm and C4:230,340 nm/450 nm),one humic-like component(C2:260,360 nm/450 nm),one component produced by phytoplankton(C3:260 nm/380 nm) and one protein-like component(C5:280 nm/330 nm).The contribution rates of each category to the total fluorescence intensity were 18%-38%,11%-18%,8%-22% and 33%-49%,respectively.The DOM in the Chongqing Section of Jialing River showed a predominantly terrestrial origin,coming from industry,domestic wastewater,and other pollution caused by human activities.Metabolism of the phytoplankton contributed little to the water DOM.The total fluorescence intensity in the 13 sampling sites showed a zigzag trend in spatial distribution.