| TiO2降解迪美唑的动力学及活性物质分析 |
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| 引用本文： | 陈冬梅,喻泽斌,孙蕾,黄俊,高丽红,李明洁.TiO2降解迪美唑的动力学及活性物质分析[J].环境科学,2015,36(11):4135-4140. |
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| 作者姓名： | 陈冬梅 喻泽斌 孙蕾 黄俊 高丽红 李明洁 |
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| 作者单位： | 广西大学环境学院, 南宁 530004;广西大学环境学院, 南宁 530004;广西大学环境学院, 南宁 530004;华蓝设计(集团)有限公司, 南宁 530011;钦州市科学技术局, 钦州 535000;广西大学环境学院, 南宁 530004 |
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| 基金项目： | 国家自然科学基金项目(21367002,51368004); 广西自然科学基金项目(2014GXNSFBA118058) |
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| 摘 要： | 兽类抗生素迪美唑是一种新兴的污染物质,对环境和人类健康具有潜在危害.以紫外光为光源,以TiO2为催化剂,对其进行光催化降解,考察了溶液pH值、TiO2投加量、溶液的初始浓度等影响因素对迪美唑降解效果的影响.结果表明,在TiO2投加量为1 g·L-1,迪美唑初始浓度为40 mg·L-1,溶液pH为11的最优条件下反应90 min后,迪美唑的去除率为90%,反应速率为0.025 7 min-1.反应符合伪一级动力学模型.光催化降解迪美唑有两个途径:一是·OH氧化过程,二是e-还原过程.
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| 关 键 词： | 迪美唑 抗生素 动力学 光催化 活性物质 |
| 收稿时间： | 2015/3/18 0:00:00 |
| 修稿时间： | 6/4/2015 12:00:00 AM |
Kinetics and Reactive Species Analysis of Dimetridazole Degradation by TiO2 |
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| CHEN Dong-mei,YU Ze-bin,SUN Lei,HUANG Jun,GAO Li-hong and LI Ming-jie.Kinetics and Reactive Species Analysis of Dimetridazole Degradation by TiO2[J].Chinese Journal of Environmental Science,2015,36(11):4135-4140. |
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| Authors: | CHEN Dong-mei YU Ze-bin SUN Lei HUANG Jun GAO Li-hong and LI Ming-jie |
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| Institution: | School of the Environment, Guangxi University, Nanning 530004, China;School of the Environment, Guangxi University, Nanning 530004, China;School of the Environment, Guangxi University, Nanning 530004, China;Hualan Design and Consulting Group Co., Ltd., Nanning 530011, China;Qinzhou Bureau of Science and Technology, Qinzhou 535000, China;School of the Environment, Guangxi University, Nanning 530004, China |
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| Abstract: | Dimetridazole is considered as an emerging pollutant in waterbodies, which can potentially impact ecosystem and human health. Heterogeneous photocatalytic decomposition of dimetridazole by TiO2 was investigated under 365 nm UV light and effects of initial pH, TiO2 content and dimetridazole concentration on photocatalytic process were discussed. The results indicated that the optimized experiment condition is that the TiO2 content of 1 g ·L-1, dimetridazole concentration of 40 mg ·L-1, pH of 11, dimetridazole can be removed 90%. The photocatalytic degradation kinetics of dimetridazole could be fitted to the quasi-first-order equation. Photocatalytic degradation of dimetridazole can take place via two pathways: oxidation by ·OH and reduction by e-. |
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| Keywords: | dimetridazole antibiotics kinetics photocatalytic reactive species |
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