水中藻类溶解性有机物特性研究

发布时间：2018-03-25 22:39

本文选题：藻类溶解性有机物　切入点：分子量分布　出处：《环境科学与技术》2016年11期

【摘要】：试验从分子量分布、三维荧光光谱和亲疏水特性3个方面研究了水中藻类(鱼腥藻、小球藻和小环藻)溶解性有机物(AOM)的特性。结果表明,3种AOM有机物在分子量分布上大分子和中小分子有机物各占一定比例。鱼腥藻AOM和小球藻AOM均表现出大分子和小分子有机物所占比例较大,中等分子有机物所占比例较小;小环藻AOM所含大分子有机物的比例相对较小,中小分子有机物是小环藻AOM的主要组成部分。荧光光谱分析得出,鱼腥藻AOM的大分子有机物主要是大分子蛋白类和腐植酸类有机物,中小分子有机物主要是小分子糖类和大分子疏水性腐殖类有机物的分解产物。小球藻AOM大分子有机物以大分子蛋白质类为主,中小分子有机物含有较多的蛋白类和腐殖酸类物质。而小环藻AOM大分子有机物主要以大分子腐殖酸类为主,中小分子有机物腐殖酸类物质含量也较多。亲疏水性分析表明,藻类AOM呈现较强的亲水特性,其SUVA值较低,主要是由亲水性的多糖和蛋白类有机物组成,疏水性腐殖类有机物质的含量相对较少。
[Abstract]:Three aspects of molecular weight distribution, three dimensional fluorescence spectrum and hydrophilic characteristics of algae (Anabaena sp.) in water were studied. The characteristics of dissolved organic matter (AOM) of Chlorella microphylla and Chlorocystis microphylla). The results show that the molecular weight distribution of the three AOM organics is in a certain proportion of macromolecule and middle and small molecular organic matter respectively. Both AOM and AOM exhibit macromolecules. And small molecule organic matter, The proportion of medium molecular organic matter is small, the proportion of macromolecular organic matter in AOM is relatively small, the medium and small molecular organic matter is the main component of AOM. The macromolecular organics of Anabaena AOM are mainly macromolecular proteins and humic acids. The medium and small molecular organic compounds are mainly the decomposition products of small molecular carbohydrates and macromolecular hydrophobic humic organisms. The macromolecular organic compounds of Chlorella microphylla AOM are mainly macromolecular proteins. Middle and small molecular organic compounds contain more proteins and humic acids, while AOM macromolecular organic compounds mainly consist of macromolecular humic acids, and the contents of middle and small molecular organic humic acids are also higher. Algae AOM showed strong hydrophilic properties, and its SUVA value was low, mainly composed of hydrophilic polysaccharides and protein organic compounds, and the content of hydrophobic humic organic substances was relatively small.
【作者单位】：华东交通大学土木建筑学院;同济大学环境科学与工程学院;
【基金】：国家水体污染控制与治理重大科技专项(2011ZX07410-002-1)
【分类号】：X524

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