不同生态类型水体溶解性有机质差异研究摘要

摘要

溶解性有机质(DOM)是水体的一个重要的组成部分,在水体化学和生物过程中起着十分重要的作用。通过对太湖，三峡库区，及高原湖泊的对比研究分析，可以发现（1）以太湖为例长江中下游的生态湖区的DOM来源和分类成分，东部湖区和湖心区因受周围影响较小，水质相对较好，DOM来源以内源为主，蛋白质含量和多糖类物质含量明显较多；北部湖区的入湖河流和竺山湾湖区其DOM含有的羧基和芳香族类物质较多，类腐殖酸物质含量不明显。（2）三峡库区内源输入明显表现为类富里酸和类腐殖酸，库区水体类腐殖酸荧光强度变化与类富里酸的变化具有一定的正相关性；同时库区类蛋白质的含量明显其原因与陆源污染物排入相关。（3）高原湖泊以红枫湖和百花湖为例的生态湖区DOM成分有明显的芳构化，羧基和芳香族类物质较多，DOM来源以陆源输入为主，腐殖酸类物质明显，荧光峰强受到深度影响。

关键词：水体；生态类型；溶解性有机质；荧光分析；

Abstract

Dissolved organic matter (DOM) is an important component in water body solution, it have vital function on water body chemical and biological process.Based on the analysis of the Three Gorges Reservoir area, Taihu, comparative study and plateau lakes, can be found that (1)Tai Lake in the Yangtze River downstream ecological example DOM source and classification component, East Lake and lake center due to peripheral impact is small, the water quality is relatively good, DOM sources to endogenous, protein content and polysaccharide content was more; the Lake District in the north of the river into the lake and Zhushan Bay Lake DOM containing carboxyl and aromatic substances, humic acids is not obvious. (2) in the Three Gorges Reservoir endogenous input is evident to the class of fulvic acid and humic acid, humic acid in water and changes in fluorescence intensity of fulvic acid has a positive correlation; at the same time, content of protein was the cause of reservoir area and discharge of land-sourced pollutants related.(3)Plateau lakes in Hongfeng Lake and Baihua Lake as an example of the ecological lake DOM is organic component of aromatic material as the main body of the present obvious aromatization, carboxyl and aromatic substances, DOM source is dominated by terrestrial input, humic acids obviously, fluorescence peak intensity by the depth of the impact.

Key words: water body; ecological types; dissolved organic matter; fluorescence analysis;