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滇池典型陆生和水生植物溶解性有机质组分的光谱分析

谢理 杨浩 渠晓霞 朱元荣 张明礼 吴丰昌

谢理, 杨浩, 渠晓霞, 朱元荣, 张明礼, 吴丰昌. 滇池典型陆生和水生植物溶解性有机质组分的光谱分析[J]. 环境科学研究, 2013, 26(1): 72-79.
引用本文: 谢理, 杨浩, 渠晓霞, 朱元荣, 张明礼, 吴丰昌. 滇池典型陆生和水生植物溶解性有机质组分的光谱分析[J]. 环境科学研究, 2013, 26(1): 72-79.
XIE Li, YANG Hao, QU Xiao-xia, ZHU Yuan-rong, ZHANG Ming-li, WU Feng-chang. Characterization of Water Extractable Organic Matters from the Dominant Plants in Lake Dianchi by Multiple Spectroscopic Techniques[J]. Research of Environmental Sciences, 2013, 26(1): 72-79.
Citation: XIE Li, YANG Hao, QU Xiao-xia, ZHU Yuan-rong, ZHANG Ming-li, WU Feng-chang. Characterization of Water Extractable Organic Matters from the Dominant Plants in Lake Dianchi by Multiple Spectroscopic Techniques[J]. Research of Environmental Sciences, 2013, 26(1): 72-79.

滇池典型陆生和水生植物溶解性有机质组分的光谱分析

基金项目: 国家重点基础研究发展计划(973)项目(2008CB418200);中央级公益性科研院所基本科研业务专项(2010KYYW04);国家自然科学基金项目(41173094)

Characterization of Water Extractable Organic Matters from the Dominant Plants in Lake Dianchi by Multiple Spectroscopic Techniques

  • 摘要: 应用紫外-可见光谱、傅里叶红外光谱与三维荧光光谱,对采自滇池外海及湖滨农田的2种典型陆生植物(玉米、紫茎泽兰)和5种水生植物(芦苇、水红花、水葫芦、眼子菜、茭草)所提取的DOM(溶解性有机质)组分进行了光谱分析. 结果表明,陆生与水生植物DOM的紫外-可见光谱曲线基本类似,吸光度均随波长的增加而降低. 陆生植物DOM的SUVA254(单位溶解性有机碳浓度下波长254 nm处吸收系数)值大于水生植物,表明滇池外源输入的DOM腐殖化程度大于内源. 植物叶中DOM的A250/A365(A250、A365分别为波长250和365 nm处的紫外吸光度比值)小于茎,表明叶中DOM的芳香性和分子量都大于茎. 陆生与水生植物DOM均有相似的红外特征峰带,其中—COO-、—CH2、—CO、—OH、—NH2的特征峰明显,表明它们是构成陆生和水生植物DOM的主要官能团. 三维荧光光谱分析表明,陆生植物茎的DOM中含有类富里酸物质,而叶的DOM中含有类腐殖酸物质. 水生植物除了水葫芦叶的DOM中含有类腐殖酸物质外,其他样品无论茎、叶都含有类富里酸物质. 除水葫芦叶外,同种植物茎的DOM中存在类色氨酸物质,而叶中不存在.

     

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出版历程
  • 收稿日期:  2012-09-06
  • 修回日期:  2012-11-07
  • 刊出日期:  2013-01-25

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