Sci Total Environ 2021 Jun 7;792:148316. Epub 2021 Jun 7.
Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Fujian 361021, China.
Unsymmetrical dimethylhydrazine (UDMH) is found to generate substantial carcinogenic nitroso-dimethylamine (NDMA) during ozonation, moreover, its formation is promoted by ubiquitous bromide ions (Br) in water matrixes, but the mechanism is still unclear. In this study, effects of Br on NDMA formation during ozonation of UDMH were studied, meanwhile, its promotion pathways were also determined. The results demonstrated that Br promoted NDMA formation from UDMH during ozonation, the formation rate constant with Br is over 7 times of that without Br. Read More