藻源型有机物氯化消毒副产物的生成特性

Characteristics of Disinfection By-Products Formation from Algae Organic Matters in the Process of Chlorination

通过亲水、疏水组分分离和电渗析获得6种不同特性的铜绿微囊藻细胞胞内外富氮有机组分,其中溶解性有机氮（DON）的质量浓度范围为0.57～1.69 mg/L;三维荧光光谱图表明,疏水性有机物主要由类腐殖质物质组成,亲水性有机物主要由蛋白质组成.经过3天氯化培养实验,分析比较各有机物组分含碳（氮）消毒副产物的生成特性.结果表明,细胞内外强疏水性有机物组分的三卤甲烷生成潜能最大,以生成三氯甲烷为主;卤代酮生成潜能与细胞内外各有机物组分有明显相关性;细胞内亲水性有机物组分的含氮消毒副产物生成潜能（DBPFP）最大;各组分消毒副产物生成潜能并不完全由溶解性有机碳（DOC）与溶解性有机氮的质量浓度比值的大小决定,还由DON的性质决定;细胞外有机物组分的DBPFP高低与芳香性有机物的含量呈正相关,细胞内有机物组分的DBPFP还受芳香性有机物性质的影响;细胞外有机物组分消毒副产物生成总量的顺序为：强疏水性组分＞亲水性组分＞弱疏水性组分;细胞内有机物组分消毒副产物生成总量的顺序为：亲水性组分＞强疏水性组分＞弱疏水性组分.

Six kinds of nitrogen-enriched intracellular and extracellular algae organic matters of Microcystic aerugi- nosa with different characteristics were obtained via the fractionation electrodialysis of hydrophilic and hydrophobic components, with the mass concentrations of dissolved organic nitrogen （DON） ranging from 0.57 to 1.69 mg/L. Then, the 3D fluorescence spectrography was adopted to analyze the composition of hydrophilic and hydrophobic components, finding that the former was mainly composed of humus-like substances and the latter mainly composed of protein. Afterwards, the formation characteristics of carbonaceous （nitrogenous） disinfection byproducts from different organic matters were analyzed and compared after a 3-day chlorination. The results show that （ 1 ） hydro- phobic intracellular and extracellular organic matters are of maximum trihalide methane formation potential, espe- cially for chloroform; （2） there is a significant correlation between haloketone formation potential and intracellular and extracellular organic matters; （3） the hydrophilic component in intracellular organic matters is of the greatest nitrogenous disinfection by-products formation potential （DBPFP） ; （4） the disinfection by-products formation po- tential of each component is not only determined by the value of DOC/DON （ namely the mass concentration ratio of dissolved organic carbon to DON） but also by the characteristics of DON ; （5） the DBPFP of extracellular organic matters is positively correlated with the content of aromatic organic materials, while that of intracellular organic mat- ters is mainly influenced by the properties of aromatic organic materials; and （6） the disinfection by-products pro- duced by extracellular organic matters are in a content order of hydrophobic by-products 〉 hydrophilic by-products 〉 transphilic by-products, while those produced by intraeellular matters are indicative of the following order： hy- drophilic by-products 〉 hydrophobic by-products 〉 transphilic by-products.