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研究了海水淡化低温多效蒸馏(LT-MED)工艺沿程水质和溴代消毒副产物(Br-DBPs)变化特征.LT-MED工艺进水海水的Br-浓度和比紫外吸收值(SUVA)分别为54.6 mg·L~(-1)和1.7 L·(mg·m)-1,其荧光特征有机物主要有色氨酸类芳香族蛋白质、富里酸类有机物和溶解性微生物代谢产物.进水海水经Na Cl O消毒后,DBPs的种类和浓度显著增加,且增加的主要为Br-DBPs,三溴甲烷(CHBr3)占总三卤甲烷(THMs)的100%;一溴乙酸(C2H3Br O2)和二溴乙酸(C2H2Br2O2)分别占总卤乙酸(HAAs)的31.9%和68.1%;四溴苯酚(C6H5Br O)占总卤代酚(HPs)的100%.LT-MED海水淡化产品水中THMs、HAAs和HPs均未检出,但是其浓水中的THMs、HAAs和HPs浓度分别为56.9、35.0和0.1μg·L~(-1).
The characteristics of water quality and Br-DBPs in LT-MED process were studied.The Br-concentration and specific ultraviolet absorption (SUVA) (54.6 mg · L -1 and 1.7 L · (mg · m) -1 respectively). The main fluorescent compounds were tryptophan aromatic protein, fulvic acid and soluble microbial metabolites. After NaClO disinfection, the species and concentration of DBPs increased significantly, and the main increase was Br-DBPs, CHBr3 accounted for 100% of total trihalomethanes (THMs); monobromoacetic acid (C2H3BrO2) Bromoacetic acid (C2H2Br2O2) accounted for 31.9% and 68.1% of the total HAAs, respectively, and tetrabromophenol (C6H5BrO) accounted for 100% of total halogenated phenols (HPs). THMs, HAAs and HPs were not detected, but the concentration of THMs, HAAs and HPs in the concentrated water were 56.9, 35.0 and 0.1 μg · L -1, respectively.