The formation of halonitromethanes (HNMs) is one of the major concerns when considering the application of UV/chlorine in the treatment of water containing bromide (Br^-). The effects of Br^- on the formation and transformation of HNMs from poly(diallyldimethylammonium chloride) during the UV/chlorine treatment were investigated in this study. The results showed that the incorporation of Br^- was beneficial for producing reactive bromine species resulting in the changes of yields and dominant species of HNMs. With the increase of Br^- concentration, the formations of brominated-HNMs (Br-HNMs) were promoted and the predominant species of HNMs were gradually converted from chlorinated-HNMs (Cl-HNMs) to brominated (chlorinated)-HNMs (Br(Cl)-HNMs) and Br-HNMs. Besides, the formation of HNMs increased with the increase of the ratio of Cl₂:Br^- and decreased with increasing pH from 6.0 to 8.0. According to the findings, the possible formation and transformation pathways of HNMs in the presence of Br^- were proposed during the UV/chlorine treatment. Finally, it was proved that the effects of Br^– on the formation and transformation of HNMs in real water were similar to that in deionized water. This study can help to understand the formation and transformation of HNMs better and develop effective measures for the control of HNMs (especially Br-HNMs) during the UV/chlorine treatment.

考虑使用紫外线/氯处理含溴化物 (Br ^- ) 的水时，卤代硝基甲烷 (HNM) 的形成是主要关注的问题之一。本研究研究了在紫外/氯处理过程中，Br ^-对聚（二烯丙基二甲基氯化铵）中 HNM 形成和转化的影响。结果表明，Br ^-的掺入有利于产生活性溴物种，导致HNMs的产量和优势物种发生变化。随着 Br 的增加^-浓度，促进溴化 HNMs (Br-HNMs) 的形成，HNMs 的主要种类逐渐从氯化 HNMs (Cl-HNMs) 转变为溴化 (氯化)-HNMs (Br(Cl)-HNMs) 和 Br -HNM。_{此外，HNMs的形成随着Cl 2} :Br ^-比例的增加而增加，随着pH值从6.0增加到8.0而减少。根据研究结果，在紫外/氯处理过程中提出了在Br ^{-存在下 HNMs 的可能形成和转化途径。}最后，证明了 Br 的影响^——HNMs 在真实水中的形成和转化与去离子水中相似。本研究有助于更好地了解 HNMs 的形成和转化，并制定有效的措施来控制 UV/氯处理过程中的 HNMs（尤其是 Br-HNMs）。