研究报告
张凌,陶莹,常志显,李德亮.臭氧法降解水中对甲基苯磺酸的动力学研究[J].环境科学学报,2011,31(10):2185-2191
臭氧法降解水中对甲基苯磺酸的动力学研究
- Kinetics of p-toluene sulfonic acid degradation by ozone in aqueous solutions
- 基金项目:河南省国际科技合作项目(No.0546640002);河南省教育厅资助科研项目(No.2007610001)
- 张凌
- 河南大学化学化工学院环境与分析科学研究所,开封 475004
- 常志显
- 河南大学化学化工学院环境与分析科学研究所,开封 475004
- 李德亮
- 河南大学化学化工学院环境与分析科学研究所,开封 475004
- 摘要:采用臭氧法降解对甲基苯磺酸废水,研究了对甲基苯磺酸降解的影响因素和动力学.考察了反应液初始浓度、初始pH值、臭氧投量、反应温度、常见无机离子等因素对臭氧氧化降解对甲基苯磺酸反应速率的影响.结果表明,对甲基苯磺酸初始浓度0.29 mmol·L-1,pH 9.0,臭氧投量3.75×10-6 mol·s-1,控制温度25 ℃,反应60 min后,对甲基苯磺酸降解率达99.0%;对甲基苯磺酸在臭氧氧化下的降解符合表观一级动力学,采用幂指数方程描述反应动力学,得到方程: C=C0exp(-0.6868 exp(-24464.8/RT)QO30.9293C0-1.7712[OH-]0.1248t).
- Abstract:The degradation kinetics of p-Toluene sulfonic acid (p-TSA) oxidized by ozone in aqueous solutions was studied. The factors that affected the reaction rate, including the initial concentration of p-TSA, pH value, ozone flux, reaction temperature and common inorganic anions and cations, were investigated. Experimental results showed that the degradation ratio could amount to 99.0% under the reaction conditions of the initial concentration of p-TSA 0.29 mmol·L-1, pH 9.0, ozone flux 3.75 × 10-6 mol·s-1, reaction time 60 min and temperature 25 ℃. The degradation process was found to follow pseudo first-order kinetics and the kinetics equation was calculated as C=C0exp(-0.6868 exp(-24464.8/RT)QO30.9293C0-1.7712[OH-]0.1248t).
摘要点击次数: 2705 全文下载次数: 3407