臭氧氧化过程中次溴酸生成的影响

Effect of Hypobromous Acid During Ozonation Process

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。

The experiment investigated the effects of different O3 flux,different concentration of Br-,different buffer solution(acetate buffer and phosphate buffer) and different p H value on the conversion rate of HOBr / OBr-.The results indicated that O3 flux almost had no effect on the conversion rate of HOBr / OBr-.The conversion rate of HOBr / OBr-increased with the Br-concentration being increased.The concentration of Br-was increased from 0 mg / L to 1.0 mg / L,and the conversion rate of HOBr / OBr-increased from 0 to60%.After that,the conversion rate of HOBr / OBr-did not increase with the concentration of Br-being increased.Acetate buffer and phosphate buffer had no significantly impact on the conversion rate of HOBr / OBr-.As the p H value being increased from 3 to 4,the conversion rate of HOBr / OBr-increased.When p H value was 4,5,6,the conversion rate of HOBr / OBr-was basically same,and the maximum was 66%.The conversion rate of HOBr / OBr-decreased significantly with the p H value being increased from 7 to 8.