| 超声降解水中的磺胺嘧啶 |
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| 引用本文： | 郭照冰,周飞,张超智,包春晓,林明月,秦开桂.超声降解水中的磺胺嘧啶[J].环境工程学报,2012,6(9):3143-3147. |
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| 作者姓名： | 郭照冰 周飞 张超智 包春晓 林明月 秦开桂 |
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| 作者单位： | 南京信息工程大学环境科学与工程学院,南京210044 江苏省大气环境监测与污染控制高技术研究重点实验室,南京210044 |
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| 基金项目： | 江苏省科技项目(BK2009414);江苏省"青蓝工程"人才项目;江苏省环保科研课题(201017);江苏省"六大人才高峰"资助项目;江苏省大学生实践创新计划项目(11CX006) |
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| 摘 要： | 以磺胺嘧啶(SD)为研究对象,探讨了超声功率、初始浓度、pH值以及超声协同H2O2、Fenton、TiO2等组合工艺对超声降解SD效率的影响。实验结果表明,超声可有效降解水中低浓度的SD,尤其在酸性条件下,超声降解更为显著,降解过程遵循准二级反应动力学模型。加入H2O2或TiO2可在一定程度上促进SD的超声降解,加入Fenton试剂则显著提升SD的去除率。依据量化计算以及LC-MS测定结果,探讨了SD的超声降解机理。超声降解水中SD主要是基于.OH自由基的氧化过程。
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| 关 键 词： | 超声 降解 磺胺嘧啶 机理 |
Degradation of sulfadiazine by ultrasonic |
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| Guo Zhaobing,Zhou Fei,Zhang Chaozhi,Bao Chunxiao,Lin Mingyue and Qin Kaigui.Degradation of sulfadiazine by ultrasonic[J].Techniques and Equipment for Environmental Pollution Control,2012,6(9):3143-3147. |
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| Authors: | Guo Zhaobing Zhou Fei Zhang Chaozhi Bao Chunxiao Lin Mingyue and Qin Kaigui |
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| Institution: | School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China;School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China;School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China;School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China;School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China;School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Nanjing 210044, China |
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| Abstract: | The effects of ultrasonic power, initial concentrations, solution pH values and addition of oxidant H2O2, Fenton reagent, TiO2 on the degradation efficiency of SD by ultrasonic(US) were studied. Experimental results show that low-concentration SD can be effectively removed by ultrasonic in aqueous solution, the removal efficiencies can be remarkably enhanced in acidic solution, and the degradation of SD was in accordance with the pseudo-second-order kinetic model. In addition, H2O2 and TiO2 can promote ultrasonic induced degradation of SD to a certain extent. However, SD removal can be markedly improved with the addition of Fenton reagent. The degradation mechanism of SD was supposed by results of quantum chemical calculations and LC-MS. Ultrasonic induced degradation of SD is mainly ascribed to ·OH oxidation. |
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| Keywords: | ultrasonic degradation sulfadiazine mechanism |
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