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Evaluating Soil Dissolved Organic Matter Extraction Using Three-Dimensional Excitation-Emission Matrix Fluorescence Spectroscopy

查看全文 作　　者：XIE [1]Wenming;ZHANG [2]Shanshan;RUAN [2]Lin;YANG [2]Mingyue;SHI [1]Weiming;ZHANG [3]Hailin;LI [4]Weihua 高影响力作者 机构地区：[1]State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences;[2]College of Environment, Hohai University;[3]Department of Plant and Soil Sciences, Oklahoma State University;[4]School of Environment and Energy Engineering, Anhui Jianzhu University高影响力机构 出　　处：《Pedosphere》索引2017年第27卷第5期,共6页高影响力期刊 基　　金：the financial support of the Special Environmental Research Fund for Public Welfare of the State Environmental Protection Administration of China (No.201309035);the Natural Science Foundation of China (No.51408587) 摘　　要：Soil dissolved organic matter(DOM) consists of many organic compounds and plays an important role in contaminant transport in the ecosystem. However, the effects of different extraction conditions on contents of different DOM components are poorly understood.We extracted DOM from three soils using different extraction times, solid to liquid ratios(SLR), and extraction solution(KCl)concentrations, and evaluated the extractions using three-dimensional excitation-emission matrix(EEM) fluorescence spectroscopy.The sum of the contents of the main DOM components(protein-, fulvic-, and humic-like compounds) increased by 0.6–3.5, 2.5–3.9,and 0.11–0.37 times(P < 0.05) when SLR decreased from 1:2 to 1:10, the extraction solution concentration increased from 0.01 to 1.5 mol L^(-1), and extraction time increased from 10 to 300 min, respectively. The three-dimensional EEM fluorescence spectroscopy is a useful tool to characterize the components of DOM and evaluate DOM extraction in soils. 关 键 词：提取条件 溶解有机物 三维荧光 土壤 评价 矩阵 发射 激发
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