| 单偶氮染料AY17的光催化降解动力学及机制 |
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| 引用本文： | 阳海,魏宏庆,胡乐天,胡倩,阳立平,刘华杰,易翔,易兵.单偶氮染料AY17的光催化降解动力学及机制[J].环境科学,2016,37(8):3086-3093. |
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| 作者姓名： | 阳海 魏宏庆 胡乐天 胡倩 阳立平 刘华杰 易翔 易兵 |
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| 作者单位： | 湖南工程学院化学化工学院, 生态纺织材料及染整新技术湖南省高校重点实验室, 湘潭 411104;湘潭大学化工学院, 湘潭 411105,湖南工程学院化学化工学院, 生态纺织材料及染整新技术湖南省高校重点实验室, 湘潭 411104,湖南工程学院化学化工学院, 生态纺织材料及染整新技术湖南省高校重点实验室, 湘潭 411104,湖南工程学院化学化工学院, 生态纺织材料及染整新技术湖南省高校重点实验室, 湘潭 411104,深圳市环境科学研究院, 深圳 518001,湖南工程学院化学化工学院, 生态纺织材料及染整新技术湖南省高校重点实验室, 湘潭 411104;湘潭大学化工学院, 湘潭 411105,湖南工程学院化学化工学院, 生态纺织材料及染整新技术湖南省高校重点实验室, 湘潭 411104,湖南工程学院化学化工学院, 生态纺织材料及染整新技术湖南省高校重点实验室, 湘潭 411104 |
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| 基金项目： | 湖南省自然科学基金项目（2015JJ3056）；湖南省教育厅创新平台项目（14K030）；国家自然科学基金项目（21207034） |
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| 摘 要： | 为了研究水体环境中单偶氮染料酸性黄17(AY17)有效地去除方式及其可能的降解途径、转化和归趋等,实验首先探索了AY17在不同深度氧化体系中降解的可行性,研究发现其去除效率的大小按照UV/H_2O_2UV/Na_2S_2O_8≈UV/FeSO_4·7H_2OUV/KHSO_5UV/TiO_2排列.然后选取UV/TiO_2体系,研究了催化剂用量,反应温度,底物浓度以及溶液初始p H值等因素对其光催化降解动力学的影响,结果表明AY17的光催化降解遵循假一级动力学,其降解速率常数为0.011 2 min~(-1);当催化剂TiO_2用量为3 g·L~(-1)时其降解效果最好;高温有利于AY17的光催化降解,而随着底物浓度和溶液初始p H值的升高,其降解速率常数显著下降.最后利用GC/MS对AY17光催化降解中间产物进行了初步鉴定,研究发现在·OH等活性氧物种的作用下偶氮键的断裂、羟基自由基对芳香环上基团的取代以及吡唑环的裂解是其主要降解途径.
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| 关 键 词： | 酸性黄17(AY17) 光催化 活性氧物种 动力学 降解机制 |
| 收稿时间： | 2/5/2016 12:00:00 AM |
| 修稿时间： | 2016/3/11 0:00:00 |
Photocatalytic Degradation Kinetics and Mechanism of Monoazo Dye Acid Yellow 17 by UV/TiO2 in Aqueous Solution |
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| YANG Hai,WEI Hong-qin,HU Le-tian,HU Qian,YANG Li-ping,LIU Hua-jie,YI Xiang and YI Bing.Photocatalytic Degradation Kinetics and Mechanism of Monoazo Dye Acid Yellow 17 by UV/TiO2 in Aqueous Solution[J].Chinese Journal of Environmental Science,2016,37(8):3086-3093. |
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| Authors: | YANG Hai WEI Hong-qin HU Le-tian HU Qian YANG Li-ping LIU Hua-jie YI Xiang and YI Bing |
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| Institution: | Key Laboratory of Ecological Textile Material & Novel Dying and Finishing Technology, Hunan Provincial Education Department, College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China;College of Chemical Engineering, Xiangtan University, Xiangtan 411005, China,Key Laboratory of Ecological Textile Material & Novel Dying and Finishing Technology, Hunan Provincial Education Department, College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China,Key Laboratory of Ecological Textile Material & Novel Dying and Finishing Technology, Hunan Provincial Education Department, College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China,Key Laboratory of Ecological Textile Material & Novel Dying and Finishing Technology, Hunan Provincial Education Department, College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China,Shenzhen Academy of Environmental Science, Shenzhen 518001, China,Key Laboratory of Ecological Textile Material & Novel Dying and Finishing Technology, Hunan Provincial Education Department, College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China;College of Chemical Engineering, Xiangtan University, Xiangtan 411005, China,Key Laboratory of Ecological Textile Material & Novel Dying and Finishing Technology, Hunan Provincial Education Department, College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China and Key Laboratory of Ecological Textile Material & Novel Dying and Finishing Technology, Hunan Provincial Education Department, College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, China |
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| Abstract: | |
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| Keywords: | acid yellow 17 (AY17) photocatalytic reactive oxygen species (ROSs) kinetics degradation mechanism |
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