Zhou Shi-Lei, Zhang Yi-Ran, Huang Ting-Lin, Li Zai-Xing, Luo Xiao
Pollution Prevention Biotechnology Laboratory of Hebei Province, School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Huan Jing Ke Xue. 2018 Dec 8;39(12):5451-5463. doi: 10.13227/j.hjkx.201804058.
Based on three-dimensional fluorescence spectra (EEMs) combined with parallel factor analysis (PARAFAC), and ultraviolet-visible (UV-Vis) spectra, we analyzed the vertical distribution and characteristics of dissolved organic matter in sediment interstitial water during the formation stage of thermal stratification in the Zhoucun Reservoir. The results show that the UV-Vis absorption coefficient varies between -400% and 400%, indicating the different properties of DOM(dissolved organic matter) at different depths. The changes of E2/E3 show that the proportion of fulvic acid in DOM increases with the stratification of the reservoir and fulvic acid accounts for the main proportion with autochthonous characteristics based on E3/E4>3.5 and >1. Two fulvic-like substances (C1, C3), two protein-like substance (C2, C5), and two humic-like substances (C4, C6) were identified with the PARAFAC model. Moreover, fulvic-like and protein-like substances account for most of substances. The total DOM fluorescence intensity and the fluorescence intensity of each component show a decreasing trend with the occurrence of stratification and exhibit significant vertical and temporal differences. Based on the analysis of FI, HIX, BIX, and in sediment interstitial water, the high BIX, FI, and low HIX indicate that the DOM of sediment interstitial water has strong autochthonous components and original characteristics of aquatic bacteria.
基于三维荧光光谱（EEMs）结合平行因子分析（PARAFAC）以及紫外可见（UV-Vis）光谱，我们分析了周村水库热分层形成阶段沉积物间隙水中溶解有机物的垂直分布和特征。结果表明，UV-Vis吸收系数在-400%至400%之间变化，表明不同深度处溶解有机物（DOM）的性质不同。E2/E3的变化表明，DOM中富里酸的比例随着水库分层而增加，基于E3/E4>3.5且>1，富里酸占主要比例且具有自生源特征。利用PARAFAC模型识别出两种类富里酸物质（C1、C3）、两种类蛋白质物质（C2、C5）和两种类腐殖质物质（C4、C6）。此外，类富里酸和类蛋白质物质占大多数物质。总DOM荧光强度和各组分荧光强度随着分层的出现呈下降趋势，且表现出显著的垂直和时间差异。基于对沉积物间隙水中FI、HIX、BIX和 的分析，高BIX、FI和低HIX表明沉积物间隙水的DOM具有较强的自生源组分和水生细菌的原始特征。
