臭氧化降解结晶紫溶液的机理  

Mechanism of degradation crystal violet by ozone in aqueous solutions

作　　者：曹红霞[1] 刘汴玲 

机构地区：[1]开封大学化学工程学院,开封475004 [2]平顶山煤业集团开封东大化工有限公司,开封475003

出　　处：《环境工程学报》2015年第8期3728-3732,共5页Chinese Journal of Environmental Engineering

基　　金：河南省教育厅自然科学研究项目(13A610084)

摘　　要：采用臭氧化法对模拟废水中难生物降解的结晶紫染料进行降解实验研究,藉助紫外光谱、红外光谱、气相色谱、化学需氧量和总有机碳的检测结果对反应机理进行了初步探讨。实验结果表明,当溶液初始质量浓度0.88 mmol/L,臭氧投加量9.06×10-5mol/min,调节初始溶液pH为10.0,控制反应温度298 K,反应120 min后,结晶紫溶液COD去除率达到97.0%。分析表明,结晶紫染料降解的中间产物主要是对氨基苯酚、丁烯二酸、乙酸等有机小分子物质,最终产物为水和二氧化碳。Degradation of bio-refractory crystal violet in simulated wastewater by ozone oxidation was exper- imentally studied. The reaction mechanism was discussed based on the analysis of ultraviolet spectroscopy, infra- red spectroscopy, gas chromatography, chemical oxygen demand and total organic carbon. Results indicated that the removal rate of crystal violet could reach 97.0% under the optimum conditions, including initial crystal violet concentration of 0. 88 mmol/L,ozone dosage of 9.06 × 10 ^-5mol/min,reaction temperature of 25℃ , pH of 10.0 and reaction time of 120 min. The detected intermediates of crystal violet oxidized by ozone are p-aminophenol, maleic acid, glyoxylic acid and other small organic molecules. The ultimate products are H2O and CO2.

关 键 词：臭氧氧化 降解 结晶紫 机理 

分 类 号：X703[环境科学与工程—环境工程]