臭氧/过氧化氢体系对水中2，4-D的去除效能及机理的研究

【作者】 庞彤心；

【导师】 高金胜；

【作者基本信息】 黑龙江大学 ， 有机化学， 2005， 硕士

【摘要】 本论文选择O₃/H₂O₂方法来研究其对水中内分泌干扰物质2,4-D的去除。探讨了过氧化氢臭氧氧化对它的去除效能及过氧化氢与臭氧摩尔比、水温、溶液pH值、水质等因素对氧化反应的影响,找到了最佳降解条件。 同时以2,4-D为目标反应物,研究了腐殖酸,自由基捕获剂叔丁醇,HCO₃^-,及水中的金属离子对2,4-D的催化臭氧化反应的作用;有机物如甲醇、甲酸、甲醛、邻苯二甲酸二丁酯对2,4-D的氧化反应的影响。 通过色质联机和高压液相色谱对内分泌干扰物质2,4-D的氧化降解产物进行了分析,确认了一些氧化中间体的存在;推测了它的氧化过程。证明了内分泌干扰物质2,4-D在O₃/H₂O₂体系中的氧化遵循自由基反应机理。更多还原

【Abstract】 We choose O3/H2O2 process to investigate the removal of the enviromental endocrine disruptors from the water. We studied the removal efficiency of O3/H2O2 process toward 2,4-D. We also studied the effect of the molar ratio of hydrogen peroxide and ozone, pH value, temperature and water background on the oxidation process.And the best confiditions of oxidation process were found.We also studied the effect of HA/Tert-butanol, a typical free radical inhibitor/HCO3- some metal ions in the water for the removal of 2,4-D. The influence of some organics such as methanol, formic acid, formic aldehyde and dibutyl phthalate toward the removal of 2,4-D were also studied.Through HPLC, GC-MS and LC-MS analysis we analyzed the degradation products of the 2, 4-D by O3/H2O2 oxidation process. The possible degradation pathways are proposed. This confirmed that the oxidation process followed the radical oxidation mechanism.更多还原