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首页> 美国政府科技报告 >Factors Affecting Incorporation of Bromide into Brominated Trihalomethanes during Chlorination
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Factors Affecting Incorporation of Bromide into Brominated Trihalomethanes during Chlorination

机译：氯化过程中影响溴化物加入溴化三卤甲烷的因素

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Nine natural waters were evaluated to define the effects of temperature, pH, chlorine dose, bromide ion concentration, precursor source and concentration, and reaction time on the formation of THM-Br and the related conversion of inorganic bromide to THM-Br. In THM formation a portion of the inorganic bromide ion concentration is converted to organically bound bromine in the three common brominated THM species. The percentage conversion (1) increases rapidly in the first stages of THM formation and approaches a plateau at longer reaction times; (2) increases with increasing pH and increasing temperature; (3) increases with chlorine concentration but approaches a plateau at high concentrations; (4) initially increases with Br(1-) concentration to a maximum percentage conversion and subsequently decreases at higher Br(1-) concentrations. It was difficult to define clear trends for the variation of percentage conversion with THM precursor source and concentration presumably because of multiplicative effects of variables as well as parameters such as ammonia concentration that were not examined in the study.

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