臭氧氧化降解三唑酮的试验

Ozonation of Endocrine Disruptors(EDs) triadimefon in water

在利用O3／H2O2体系氧化三唑酮的基础上，探讨了O3氧三唑酮的最佳反应条件和水中杂质对氧化反应的影响，并对氧化产物进行了分析．研究结果表明，三唑酮浓度为3mg·L^-1、臭氧浓度为25mg·L^-1、室温（26℃）、pH值为7～8条件下，三唑酮去除率最高可达94．1％；腐殖酸对三唑酮的降解表现为低浓度促进、高浓度抑制，HCO3^-对三唑酮降解的抑制作用较小；伴随三唑酮的降解，体系pH下降．色谱分析结果表明，三唑酮首先被氧化为1，2，4-三唑、对氯苯酚和酸性产物，最终生成NO3-、Cl^-、CO2和H2O小分子，降解比较彻底．

Ozonation of the endocrine disrupting chemical triadimefon was investigated in the O3/H2O2 system. The research results indicated that the triadimefon could be removed by 91.4% when the experiment was carried out under the following conditions： room temperature （26℃） , pH =7-8, initial concentration of triadimefon = 3 mg·L^-1 , concentration of ozone = 25 mg·L^-1. It was observed that humie acid dosed at low concentration improved the degradation of triadimefon while retarded the triadimefon degradation at high concentration. However, HCO3^- had minor effects on depressing the ozonation of triadimefon. With the degradation of triadimefon, pH of the system decreased. Chromatography analysis revealed that triadimefon was firstly oxidized to 1,2,4-triazole, 4-ehlorophenol and acidic substances and then further oxidized to NO3^- , Cl^- , CO2 and H2O. Therefore, triadimefon could be degraded thoroughly by the O3/H2O2 system.