典型藻源有机质在紫外/氯体系中的转化及消毒副产物的生成  

Algal organic matters transformation in UV/chlorine process and disinfection byproducts formation

作　　者：任鹏飞 张欣然 宋子龙 周建华 查珂琪 REN Pengfei;ZHANG Xinran;SONG Zilong;ZHOU Jianhua;ZHA Keqi(Guangzhou Municipal Engineering Design&Research Institute,Guangzhou 510060,China;School of Environmental Science and Engineering,Sun Yat-sen University,Guangzhou 510060,China)

机构地区：[1]广州市市政工程设计研究总院有限公司,广州510006 [2]中山大学环境科学与工程学院,广州510006

出　　处：《环境工程学报》2024年第8期2237-2245,共9页Chinese Journal of Environmental Engineering

基　　金：国家自然科学面上基金资助项目(22376230);广州市市政工程设计研究总院有限公司科技开发项目(KY-2022-010)。

摘　　要：含藻水源中藻源有机质(AOM)导致消毒副产物(DBPs)的生成严重威胁供水安全。为此,该研究系统考察了AOM及其代表性蛋白类组分藻蓝蛋白在紫外/氯(UV/Cl_(2))体系中的DBPs生成规律,并进一步解析了自由基诱导的藻蓝蛋白转化路径。结果表明,相比单独氯化处理,在紫外剂量为280 mJ·cm^(-2)和投氯量为6 mg·L^(-1)的条件下,在UV/Cl_(2)体系中,由AOM转化生成三氯甲烷(TCM)、二氯乙腈(DCAN)和三氯硝基甲烷(TCNM)的浓度分别增加了59.3%、160.7%和143.6%。UV/Cl_(2)体系对藻蓝蛋白也同样表现出DBPs生成的促进效应,且DBPs生成量与氯投加量和反应时间正相关。相比p H=6.0,在p H=8.0时TCM和DCAN生成势有所增加。傅里叶变换磁回旋共振质谱(FT-ICR-MS)表征结果表明,藻蓝蛋白中脂质类结构和木质素类结构占主导地位并在紫外/氯体系中变化最为显著。相比单独氯化,紫外/氯体系中生成了更多的氯代副产物,脂质和不饱和碳氢类化合物是氯代副产物的重要前体结构。The formation of disinfection by-products(DBPs)from the algal organic matter(AOM)in algaecontaining water sources seriously threatens the safety of water supply.In this study,the formation potential of DBPs from typical AOM and representative protein component phycocyanin in the UV/chlorine treatment was systematically investigated,and the radical-mediated transformation pathway of phycocyanin was further analyzed.The results indicate that in comparison with chlorine alone treatment,the UV/chlorine treatment with 280 mJ·cm^(-2) UV dose and 6 mg·L^(-1) Cl_(2) dosage could significantly increase chloroform(TCM),dichloroacetonitrile(DCAN)and trichloronitromethane(TCNM)by 59.3%、160.7%and 143.6%,respectively,the same promotion effect also occurred for DBPs formation from phycocyanin,and DBPs formation was positively correlated with chlorine dosage and UV/chlorine reaction time.Compared with pH 6.0,the formation potentials of TCM and DCAN increased at pH 8.0.FT-ICR-MS data showed that lipids and lignins were dominant in phycocyanin and the most significant changes occurred in UV/chlorine treatment.Compared with chlorination alone,more chlorinated by-products were produced in the UV/chlorine treatment.Lipids and unsaturated hydrocarbons were important precursor structures of chlorination by-products.

关 键 词：藻源有机质 紫外/氯 消毒副产物 傅里叶变换磁回旋共振质谱 

分 类 号：X703[环境科学与工程—环境工程]