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目的探讨酸性氧化电位水(酸化水)中的成分过氧化氢(H2O2)和臭氧(O3)。方法测定有效氯浓度分别为31.91、43.24、51.40mg/L的酸化水中H2O2和O3的含量。并以与酸化水含相同Cl-浓度的氯化钠溶液作为待测液和在测酸化水中H2O2含量时使用丙二酸作为Cl2的掩蔽剂的待测液进行H2O2含量测定的对比实验。同时,考察了酸化水中Cl2与丙二酸在反应10、20、30min时对酸化水中O3含量测定结果的影响。结果随着酸化水中有效氯浓度的增加,H2O2含量呈下降趋势(均P<0.05)。当加入与酸化水含相同Cl-浓度的氯化钠溶液或过量的丙二酸后,酸化水中的H2O2含量与空白对照比较,差异均无统计学意义(P>0.05)。与空白对照比较,3种酸化水中O3含量的A值较高,差异均有统计学意义(P<0.05);且随着反应时间的延长和酸化水中有效氯浓度的增加,酸化水中O3浓度呈下降趋势。结论酸化水中可能含有低浓度的O3,不含H2O2,推测二者在酸化水杀菌作用中的贡献较小。
Objective To investigate the effects of hydrogen peroxide (H2O2) and ozone (O3) in acidic oxidizing water (acidified water). Methods The contents of H2O2 and O3 in acidified water with effective chlorine concentrations of 31.91, 43.24 and 51.40 mg / L were determined. And compared with acidified water containing the same Cl - concentration of sodium chloride solution as the test solution and the measured H2O2 content in acidified water using malonic acid as Cl2 masking agent of the test solution H2O2 content comparison test. At the same time, the effect of Cl2 and malonic acid in acidified water on the determination of O3 in acidified water was investigated at the reaction time of 10, 20 and 30 min. Results With the increase of available chlorine concentration in acidified water, H2O2 content showed a decreasing trend (all P <0.05). When adding sodium chloride solution or excess malonic acid with the same Cl - concentration as the acidified water, the H2O2 content in the acidified water was not significantly different from that of the blank control (P> 0.05). Compared with the control, the A value of O3 content in the three kinds of acidified water was higher, the differences were statistically significant (P <0.05). With the extension of reaction time and the increase of effective chlorine concentration in acidified water, the concentration of O3 in acidified water was Downtrend. Conclusion Acidified water may contain low concentrations of O3 and not H2O2, suggesting that the two have little contribution to the bactericidal effect of acidified water.