| 三峡库区消落带水体DOM不同分子量组分三维荧光特征 |
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| 引用本文： | 陈雪霜,江韬,卢松,魏世强,王定勇,闫金龙. 三峡库区消落带水体DOM不同分子量组分三维荧光特征[J]. 环境科学, 2016, 37(3): 884-892 |
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| 作者姓名： | 陈雪霜 江韬 卢松 魏世强 王定勇 闫金龙 |
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| 作者单位： | 西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆市农业资源与环境研究重点实验室, 重庆 400716;西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆市农业资源与环境研究重点实验室, 重庆 400716;Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Sweden Umeå SE-90183;西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆市农业资源与环境研究重点实验室, 重庆 400716;西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆市农业资源与环境研究重点实验室, 重庆 400716;西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆市农业资源与环境研究重点实验室, 重庆 400716;西南大学资源环境学院, 三峡库区生态环境教育部重点实验室, 重庆市农业资源与环境研究重点实验室, 重庆 400716 |
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| 基金项目： | 国家自然科学基金项目(41403079);重庆市科委基础与前沿研究计划项目(cstc2015jcyjA20021);国家级大学生创新创业训练计划项目(201310635054);重庆市博士后科研项目(Xm2014023);中央高校基本业务费专项(XDJK2015B035);中国博士后科学基金项目(2013M542238) |
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| 摘 要： | 本研究利用超滤技术和三维荧光光谱,以三峡库区典型消落带水体溶解性有机质(DOM)不同分子量组分为对象,分析和讨论了不同分子量级分的组成差异和输入来源.结果表明,该区域DOM分子量分布情况较为分散,但胶体(M_r1×10~3~0.22μm)和真溶态组分(M_r1×10~3)均对DOC总质量贡献相当.不同分子量级分中均存在A、C、B、T峰,其相对含量分配均呈现出一致趋势,即真溶态(M_r1×10~3)低分子量组分(M_r1×10~3~10×10~3)中分子量组分(M_r10×10~3~30×10~3)高分子量组分(M_r30×10~3~0.22μm).另外,DOM随超滤分子量等级降低,FI和BIX值增加,"内源"输入特征增强;腐殖化程度降低(HIX值下降).陆源输入主要影响高、中分子组分,而内源输入主要影响低分子及真溶态部分.同时,沿岸不同土地利用类型对水体DOM性质和组成影响明显.土地利用类型多样性、生态景观结构复杂程度越高,水体DOM不同分子量等级中各荧光组分也越复杂.
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| 关 键 词： | 溶解性有机质 超滤 三维荧光光谱 三峡库区 消落带 水体有机胶体 |
| 收稿时间： | 2015-08-31 |
| 修稿时间： | 2015-11-11 |
Three-dimensional Fluorescence Spectral Characteristics of Different Molecular Weight Fractionations of Dissolved Organic Matter in the Water-level Fluctuation Zones of Three Gorges Reservoir Areas |
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| CHEN Xue-shuang,JIANG Tao,LU Song,WEI Shi-qiang,WANG Ding-yong and YAN Jin-long. Three-dimensional Fluorescence Spectral Characteristics of Different Molecular Weight Fractionations of Dissolved Organic Matter in the Water-level Fluctuation Zones of Three Gorges Reservoir Areas[J]. Chinese Journal of Environmental Science, 2016, 37(3): 884-892 |
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| Authors: | CHEN Xue-shuang JIANG Tao LU Song WEI Shi-qiang WANG Ding-yong YAN Jin-long |
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| Affiliation: | Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing Key Laboratory of Agricultural Resources and Environment, College of Resources and Environment, Southwest University, Chongqing 400716, China;Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing Key Laboratory of Agricultural Resources and Environment, College of Resources and Environment, Southwest University, Chongqing 400716, China;Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå SE-90183, Sweden;Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing Key Laboratory of Agricultural Resources and Environment, College of Resources and Environment, Southwest University, Chongqing 400716, China;Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing Key Laboratory of Agricultural Resources and Environment, College of Resources and Environment, Southwest University, Chongqing 400716, China;Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing Key Laboratory of Agricultural Resources and Environment, College of Resources and Environment, Southwest University, Chongqing 400716, China;Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing Key Laboratory of Agricultural Resources and Environment, College of Resources and Environment, Southwest University, Chongqing 400716, China |
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| Abstract: | |
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| Keywords: | dissolved organic matter(DOM) ultrafiltration three-dimensional fluorescence spectrum Three Gorges Reservoir areas water-level fluctuation zones water organic colloid |
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