【摘要】 研究长江上海段原水中Br-在氯化过程中的产物,以BrO3-、Br-和三卤甲烷(THMs)为主要测定物,考察pH值、氯投加量和Br-浓度对三者生成量的影响.研究表明,BrO3-在氯化过程中的形成缓慢,其生成量与氯投加量正相关,常规消毒条件下不会超过10μg/L的国家标准.在余氯充足的情况下,增加Br-浓度主要增加了总有机溴(TOBr),而BrO3-生成量基本不变,弱碱性条件有利于TOBr的生成;THMs和TOBr有一定相关性,Br-浓度升高将导致THMs生成量增加,其中三氯甲烷浓度下降,混合取代的THMs浓度先增加后减少,三溴甲烷浓度显著上升.更多还原

【Abstract】 The products of Br- in chlorination process in Shanghai section raw water of Yangtze River was studied, using BrO3-, Br- and trihalomethanes(THMs) as the main detection matter. The influence of pH value, chlorine adding amount and Br- concentration on the production amounts of these three products was explored. The formation of BrO3- in chlorination process was slow relatively. Its production amount related positively with chlorine adding amount, could not exceed the national 10μg/L standards under the rule disinfection condition. Under the condition of residual chlorine satisfying, increasing Br- concentration increased mainly the amount of total organic bromine(TOBr), whereas BrO3- production amount was not changed basically. Weak alkaline condition was favorable to the formation of TOBr; THMs and TOBr had definite relationship, enhancing Br- concentration would induce the increase of production amount of trihalomethanes in which chloroform concentration lowered, mixed substitute THMs increased first, then decreased, bromoform increased markedly.更多还原