【作者】 白敏冬； 李嘉欣； 张拿慧； 马彬；

【Author】 LI Jia-xin;BAI Min-dong;ZHANG Na-hui;ZHANG Zhi-tao;MA Bin;Environmental Engineering Institute,Dalian Maritime University;College of Environment and Ecology, Xiamen University;

【机构】 大连海事大学环境工程研究所； 厦门大学环境与生态学院；

【摘要】 本文针对强电场放电协同射流技术这一研究手段,对水相中生成的过氧化氢进行研究。为完成上述研究目的,将强电场放电产生的O3等氧活性粒子高效混溶于水溶液中,测定在其发生一系列链反应过程中生成的H2O2。通过改变放电功率、水溶液初始p H值和温度,用分光光度计检测水样中总残余氧化剂(TRO)的浓度和加入过氧化氢酶后水样中的TRO浓度,二者之差即为过氧化氢的浓度。分析条件的改变对H2O2生成量的影响。放电功率从200W增加到280W,H2O2的浓度先增大后降低,在240W时,H2O2浓度最大,为0.17mg/L;p H值从4增加到9,H2O2的浓度由0增加到0.27mg/L;温度从10℃增加到25℃,H2O2的浓度由0.26mg/L降至0.04mg/L,在30℃时未检出。放电功率为240W时最有利于H2O2的生成;p H值在一定范围(4~9)内的增加有利于H2O2的生成;温度的升高抑制H2O2的生成,因此,在放电功率240W、水溶液初始温度降低的条件下最有利于H2O2的生成。更多还原

【Abstract】 In this paper, the technique of strong electric-field discharge combined with impingingjet is used to study the formation of hydrogen peroxide in aqueous sample.In order to achieve the purpose ofabove-mentioned, thestrong electric-field dischargeis used to generate active particles which are efficiently miscible in water solution.This can occur a series of chain reaction to generate H2O2.Changing the discharge power, initial p H value and temperature of water solution, we detect the concentration of TRO in aqueous samples and samples which are added catalase.The difference between the two is the concentration of hydrogen peroxide.Thenanalyse the influence of changing conditions on H2O2 formation.When discharge power increases from 200 W to 280 W,the concentration of H2O2 increases first and then decreases.0.17mg/L is the maximum concentration of H2O2 while discharge power is 240 W. The p H value increases from 4 to 9,the concentration of H2O2 increases from 0 to 0.27mg/L.The temperature increases from 10 ℃ to 25 ℃ andthe concentration of H2O2 decreases from 0.26 mg/L to 0.04mg/L.H2O2 can’t be detected in 30℃.The discharge power in 240 W is the most favorable to the formation of H2O2.The p H value in the certain range(4~9) of the increase is beneficial to the formation of H2O2 and the increasing temperatureinhibit the production of H2O2.Therefore, the initial solution with lowtemperaturecombined with 240 W of discharge power is beneficial to the formation of H2O2.更多还原