臭氧氧化过程中次溴酸生成的影响

发布时间：2018-05-02 14:16

  本文选题：臭氧 + 缓冲溶液　； 参考：《四川大学学报(工程科学版)》2014年S2期

【摘要】：考察了不同O3通量、不同Br-浓度、HAc-Na Ac和H3PO4-Na H2PO42种缓冲溶液以及不同p H值对O3氧化Br-生成HOBr/OBr-转化率的影响。实验表明,O3通量对HOBr/OBr-的转化率基本没有影响;Br-浓度增加,HOBr/OBr-的转化率增加,Br-浓度从0 mg/L增加到1.0 mg/L时,转化率从0增加到60%,Br-浓度继续增加HOBr/OBr-转化率基本不再变化;HAc-Na Ac和H3PO4-Na H2PO42种缓冲溶液对HOBr/OBr-的转化率均无显著影响;p H为3、4时,随着p H值增加,HOBr/OBr-的转化率增加,当p H=4、5、6时,HOBr/OBr-的转化率基本相同,达到最高的66%,p H为7、8时,随着p H升高,HOBr/OBr-的转化率明显下降。
[Abstract]:The effects of different O _ 3 fluxes, different Br-concentrations of HAc-NaAc and H3PO4-Na H2PO42 buffer solutions and different pH values on the conversion of O _ 3 to HOBr-O _ (-) were investigated. The experimental results show that the flux of O _ 3 has no effect on the conversion of HOBr-O _ (-) -O _ (-) when the concentration of Br-O _ (-) increases from 0 mg/L to 1. 0 mg/L, The conversion rate of HAc-NaAc and H3PO4-Na H2PO42 seed buffer solution had no significant effect on the conversion of HOBr-OBr- with the increase of pH value, and the conversion rate of HOBr-OBr- increased with the increase of pH value when the conversion rate increased from 0 to 60% Br-concentration, and the conversion rate of HAc-NaAc and H3PO4-Na H2PO42 seed buffer solution had no significant effect on the conversion rate of HOBr-OBr-, and the conversion rate of HOBr-OBr- increased with the increase of pH value. The conversion rate of HOBr- / OBr- was almost the same when it was 55,6, and reached the highest ratio of 66pH = 7,8. The conversion rate of HOBr- / OBr- decreased obviously with the increase of pH.
【作者单位】： 四川大学建筑与环境学院;彭州市水务局;
【基金】：教育部创新团队资助项目(ITR1027)
【分类号】：TU991.2
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本文编号：1834253