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Effects of Ions on THM Formation During Chlorination of Bromide-Containing Water
Water, Air, & Soil Pollution ( IF 2.9 ) Pub Date : 2020-08-05 , DOI: 10.1007/s11270-020-04786-6
Na Ta , Chenghao Li , Yi Wang , Wuyun An

Disinfection byproducts (DBPs) have attracted extensive attention due to their adverse health effects such as genotoxicity, mutagenicity, and carcinogenicity. With higher formation potential and occurrence in all disinfection processes, trihalomethanes (THMs) are one of the most significant DBPs. Since ions are universally existent by natural or anthropogenic input to groundwater or surface water, the effects of ions (Ca2+, Mg2+, NH+4, As3+, Fe3+, Al3+, Cu2+, and F) on THM formation during chlorination in bromide-containing water were investigated in the present study. The results showed that THM formation and speciation were substantially influenced by the ions, but the degree and mechanisms of effects were critically dependent on the ion species. THM formation was inhibited by Ca2+, Mg2+, As3+, and NH+4 significantly, and was enhanced by Fe3+, Cu2+, and Al3+. The mechanisms of influence of the above ions were interpreted for complexation, consumption, and catalysis. Furthermore, due to the higher Br concentration, CHBr3 was the dominant species in THMs.

中文翻译:

含溴水氯化过程中离子对THM形成的影响

消毒副产物(DBP)由于其不利的健康影响而受到广泛关注,例如遗传毒性,诱变性和致癌性。三卤甲烷(THM)具有较高的形成潜能,并且在所有消毒过程中均会发生,是最重要的DBP之一。由于离子是通过自然或人为输入进入地下水或地表水而普遍存在的,因此离子的影响(Ca 2 +,Mg 2 +,NH + 4,As 3+,Fe 3+,Al 3+,Cu 2+和˚F -本研究研究了在含溴的水中氯化过程中THM的形成。结果表明,THM的形成和形态受离子的影响很大,但影响的程度和机理却主要取决于离子的种类。THM的形成受到Ca 2 +,Mg 2 +,As 3+和NH + 4的显着抑制,并被Fe 3+,Cu 2+和Al 3+增强。解释了上述离子的影响机理,包括络合,消耗和催化作用。此外,由于较高的溴-浓度,CHBr 3 是THM中的优势种。
更新日期:2020-08-05
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