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以铜绿微囊藻模拟高藻水,初始脱氧后形成类藻华环境中最不利溶解氧条件,考察藻类向水体释放嗅味污染物的特征。结果表明,在非严格厌氧条件下,铜绿微囊藻释放的嗅味污染物包括β-环柠檬醛、β-紫罗兰酮等,其中以β-环柠檬醛为主;另外两种常见的藻源性嗅味污染物(2-甲基异莰醇和土臭素)均低于检测限。对于含藻量为106cells/L的高藻水,β-环柠檬醛的释放浓度在检测期内呈无规律性变化,最高浓度为44.0 ng/L。嗅味污染物的分布特征表明,藻细胞内仍保留相当大一部分的释放潜能,对于浓度为106cells/L的高藻水,胞内潜能最大含量为146.8 ng/L,胞外释放量及胞内潜能总和与藻细胞浓度成正比。当藻浓度为108cells/L时,β-环柠檬醛在气相、水相和细胞内的存在浓度分别为260.2、426.2和8 231.2 ng/L,其组成比例分别为2.9%、4.8%和92.3%。
Microcystis aeruginosa simulated algae water, the initial deoxygenation algal-like environment to form the most unfavorable dissolved oxygen conditions, to investigate the characteristics of algae to release water to the smell of pollutants. The results showed that under non-strict anaerobic conditions, the odor and odor pollutants released by Microcystis aeruginosa include β-Cyclodextrin and β-Ionone, among which β-Cyclodextrine is the main one. The other two common algae Source odorous contaminants (2-methylisoxanthene and geosmin) were below the limit of detection. For algae water with algae content of 106cells / L, the release concentration of β -cycline citral changed irregularly during the test period with the highest concentration of 44.0 ng / L. The distribution characteristics of odor and smell pollutants showed that algal cells still retained a considerable part of their release potential. The maximum intracellular potential was 146.8 ng / L for 106 cells / L algae water, and the extracellular release and intracellular The total potential is proportional to the concentration of algal cells. When the concentration of algae was 108 cells / L, the concentrations of β -cyclic citral in the gas phase, aqueous phase and intracellular were 260.2, 426.2 and 8 231.2 ng / L, respectively, with the proportion of 2.9%, 4.8% and 92.3% .