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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Fluorescence Characteristics of Dissolved Organic Matter (DOM) in Percolation Water and Lateral Seepage Affected by Soil Solution (S-S) in a Lysimeter Test
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Fluorescence Characteristics of Dissolved Organic Matter (DOM) in Percolation Water and Lateral Seepage Affected by Soil Solution (S-S) in a Lysimeter Test

机译：渗漏试验中渗滤水中溶解性有机物（DOM）的荧光特性以及土壤溶液（S-S）对横向渗透的影响

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The composition and structure of dissolved organic matter (DOM) are sensitive indicators that guide the water infiltration process in soil. The DOM chemical composition in seepage affects river water quality and changes soil organic matter (SOM). In this lysimeter test study, fluorescence spectra and optical indices were used to examine the interaction between the percolation water (P-W) and leachate water (L-W) DOMs affected by the soil solution (S-S). The L-W DOM had a higher aromaticity (SUVA254), average molecular weight (S275-295) and terrestrial source (fluorescence index (FI)), but fewer autochthonous sources (biological index (BIX)) than the P-W DOM. Organic carbon standardization (OCS) and protein- (PLF), fulvic- (FLF) and humic-like fluorescence (HLF) intensity showed that L-W DOM increased 44%, 55% and 81%, respectively, compared to the P-W DOM. The linear regression slopes between OCS FLF and PLF were 0.62, 1.74 and 1.79 for P-W, L-W and S-S, respectively. The slopes between OCS HLF and PLF were 0.15, 0.58 and 0.64 for P-W, L-W and S-S, respectively. The P-W DOM was in contact with the soil litter layer, where S-S labile lignin phenolic compounds released and dissolved into the L-W DOM. This increased its aromaticity, and extent of humification.
机译：溶解有机物（DOM）的组成和结构是指导土壤中水渗透过程的敏感指标。渗流中的DOM化学成分会影响河流水质并改变土壤有机质（SOM）。在这项溶渗仪测试研究中，荧光光谱和光学指数被用来检验渗滤水（P-W）和渗滤液水（L-W）DOM受土壤溶液（S-S）影响的相互作用。 L-W DOM具有比P-W DOM更高的芳香性（SUVA254），平均分子量（S275-295）和陆地来源（荧光指数（FI）），但本地来源（生物指数（BIX））却较少。与P-W DOM相比，有机碳标准化（OCS）和蛋白质-（PLF），富勒维-（FLF）和类腐殖质荧光（HLF）强度显示，L-W DOM分别增加了44％，55％和81％。对于P-W，L-W和S-S，OCS FLF和PLF之间的线性回归斜率分别为0.62、1.74和1.79。对于P-W，L-W和S-S，OCS HLF和PLF之间的斜率分别为0.15、0.58和0.64。 P-W DOM与土壤垫料层接触，在那里S-S不稳定的木质素酚类化合物释放并溶解到L-W DOM中。这增加了它的芳香性，并增加了腐殖化的程度。

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