环境化学
李绍峰,石冶,崔崇威.臭氧氧化降解三唑酮的试验[J].环境科学学报,2008,28(7):1381-1388
臭氧氧化降解三唑酮的试验
- Ozonation of Endocrine Disruptors(EDs) triadimefon in water
- 基金项目：深圳市科技局资助项目(No06KJD036)
- 作者
- 单位
- 李绍峰
- 深圳职业技术学院建筑与环境工程系, 深圳 518055
- 石冶
- 哈尔滨工业大学深圳研究生院土木工程学部, 深圳 518055
- 崔崇威
- 哈尔滨工业大学市政环境工程学院, 哈尔滨 150090
- 摘要：在利用O3/H2O2体系氧化三唑酮的基础上,探讨了O3氧化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.
- Abstract：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 humic 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, pHof the system decreased. Chromatography analysis revealed that triadimefon was firstly oxidized to 1,2,4-triazole, 4-chlorophenol and acidic substances and then further oxidized to NO3-, Cl-, CO2 and H2O. Therefore, triadimefon could be degraded thoroughly by the O3/H2O2 system.
- Key words：EDCs triadimefon AOPs products
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