【作者】 白敏冬； 马彬； 张拿慧； 李嘉欣； 成建国；

【Author】 BAI Min-dong;MA Bin;ZHANG Na-hui;LI Jia-xin;CHENG Jian-guo;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】 利用大气压强电场放电协同气液混溶方法氧化降解水中难降解的酚类有机物—对羟基苯甲酸(4-HBA),并研究p H、温度和H2O2投加量和投加方式的改变对4-HBA去除率影响。以浓度为1000μmol/L的4-HBA水溶液作为研究水体,将其通过大气压强电场放电协同气液混溶装置进行处理,通过高效液相色谱测定在改变p H、温度、过氧化氢投加量和投加方式的条件下4-HBA的去除率。p H从4增加到9,4-HBA的去除率从30.77%升高到57.24%,3,4-DHBA的生成浓度从25.07μmol/L增加到66.33μmol/L;温度从10℃升高到30℃,4-HBA的去除率从54.33%下降到45.78%,3,4-DHBA的生成浓度从74.47μmol/L降低到37.65μmol/L。H2O2投加量为1mg/L、2mg/L、5mg/L,4-HBA的去除率从50.13%升高到64.15%,前投加H2O2比后投加4-HBA的去除率高。增加p H、降低温度有助于4-HBA的氧化降解,反应前加入一定量的H2O2有助于4-HBA的氧化降解。因此在碱性低温存在H2O2的条件下,4-HBA的氧化降解效果更好。更多还原

【Abstract】 Degradate refractory phenol organic matter in water by using cooperation of strong-field ionization discharge and effective interfusion, and study the influence of p H,temperature,concentration and dosing method of H2O2 on removal rate of 4-HBA hydroxyl radicals(·OH)which produced by atmospheric pressure electric discharge.Take 4-HBA which concentration is 1000μmol/L as researching background, and treat the solution by cooperation of strong-field ionization discharge and effective interfusion instrument.And determine the removal rate of 4-HBA and the concentration of it’s by-product 3,4-DHBA by using Dionex HPLC system in different p H, temperature,concentration and dosing method of H2O2.When p H increase from 4 to 9, the removal rate of 4-HBA ascend from 30.77% to 57.24% and the concentration of it’s product 3,4-DHBA ascend from 25.07μmol/L to 66.33μmol/L. When temperature increase from 10℃to 30℃, the removal rate of 4-HBA descend from54.33% to 45.78% and the concentration of it’s product 3,4-DHBA descend from74.47μmol/L to 37.65μmol/L.When concentration of H2O2 increase from 0 to 5mg/L,the removal rate increase from 50.13% to 64.15%.The concentration of H2O2 range from 1 to 5 mg/L, removal rate increase from 50.13% to 64.15%.Dosing before treatment is better than after Increase p H, decrease temperature and add a certain amount of H2O2 is of advantage to the degradation rate of 4-HBA and its product 3,4-DHBA.So the effect of removal of 4-HBA is better in the situation of alkalinity,low temperature and with H2O2 in solution and dose before treatment.更多还原