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Tradeoff Between Bromate Versus TOBr Formation 溴酸盐与TOBr形成之间的权衡
发布日期: 1995-01-01
在模型水上进行了真实分批实验,以研究在存在天然有机物的情况下,臭氧-溴化物相互作用过程中溴酸盐(BrO3-)和溴化有机物(以总有机溴(TOBr)的形式测量)的形成。初步实验结果表明,可以形成显著水平的BrO3-和TOBr。TOBr产量占初始溴总量的0.5%至34%,平均值为7.2%。溴化物的生成量占初始溴总量的1%到78%,平均值为16.6%。HO自由基清除剂的添加和pH值的调整对BrO3-和TOBr的形成有显著影响。降低pH值和添加HO自由基清除剂可减少BrO30的产生,但促进TOBr的产生。添加过氧化氢(.35 mg H2O2/mg O3)可有效控制TOBr的形成,但对于BrO3,观察到的结果不一- 组成氨的加入减少了溴酸盐的生成,而TOBr的生产结果好坏参半。最后,随着臭氧剂量/DOC比率的降低,溴酸盐和TOBr的产量均降低。
True batch experiments were performed on model waters to study the formation of bromate (BrO3-) and brominated organics, measured as total organic bromine (TOBr), during ozone-bromide interactions in the presence of natural organic matter. Preliminary experimental results indicated that significant levels of both BrO3- and TOBr can be formed. TOBr production ranges from 0.5% to 34% of the total initial bromide, with an average value of 7.2%. BrO3- formation ranges from less than 1% to 78% of the total initial bromide, with an average value of 16.6%. HO radical scavenger addition and pH adjustment have significant effects on BrO3- and TOBr formation. Depression pH and HO radical scavenger addition reduce BrO30 production, but promote TOBr production. Hydrogen peroxide addition (.35 mg H2O2/mg O3) effectively controls TOBr formation but mixed results were observed for BrO3- formation. Ammonia addition decreased bromate formation, while mixed results were observed for TOBr production. Finally, both bromate and TOBr production decreased as ozone dose/DOC ratio decreased.
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发布单位或类别: 美国-美国给水工程协会
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