| 掺氮Ta2O5诱发可见光-类Fenton体系降解阿特拉津研究 |
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| 引用本文： | 赵璐,邓一荣,杜瑛珣,傅翔.掺氮Ta2O5诱发可见光-类Fenton体系降解阿特拉津研究[J].环境科学,2012,33(4):1252-1259. |
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| 作者姓名： | 赵璐 邓一荣 杜瑛珣 傅翔 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京 210008; 中国科学院研究生院,北京 100049;中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京 210008; 桂林矿产地质研究院,桂林 541004;中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京 210008; 河海大学水文水资源与水利工程科学国家重点实验室,南京 210098;中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京 210008 |
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| 基金项目： | 国家自然科学青年基金项目(20906098); 江苏省自然科学基金项目(BK2010602); 中国科学院创新工程科研项目(NIGLAS2010QD03); 水文水资源与水利工程科学国家重点实验室开放研究基金项目(2009490811) |
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| 摘 要： | 通过制备具有强可见光吸收和活性的半导体掺氮Ta2O5,利用其可见光Fe3+还原活性,实现了可见光-类Fenton体系有效地降解阿特拉津.结果表明,氨气流量0.3 L.min-1、700℃氮化时间6 h制备出的掺氮Ta2O5在可见光下还原Fe3+的能力最佳;阿特拉津降解效果与各种操作条件———光强、催化剂投加量、Fe3+、H2O2、阿特拉津初始浓度及pH值有关,并通过H2O2的分解揭示影响的原因.在pH为2.6、atrazine]0=18 mg.L-1、H2O2]0=2.5 mmol.L-1、Fe3+]0=0.5 mmol.L-1、掺氮Ta2O5投加量为0.6 g.L-1、500 W氙灯照射下,反应60 min时,阿特拉津的降解率为97%.该研究为可见光-类Fenton体系降解有机污染物的实际应用提供了基础数据和理论指导.
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| 关 键 词： | 可见光 类Fenton 掺氮Ta2O5 Fe3+还原 阿特拉津 |
| 收稿时间： | 2011/5/19 0:00:00 |
| 修稿时间： | 2011/8/29 0:00:00 |
Study on the Degradation of Atrazine in Photo-Fenton-Like System Under Visible Light Irradiation Promoted by N-doped Ta2O5 |
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| ZHAO Lu,DENG Yi-rong,DU Ying-xun and FU Xiang.Study on the Degradation of Atrazine in Photo-Fenton-Like System Under Visible Light Irradiation Promoted by N-doped Ta2O5[J].Chinese Journal of Environmental Science,2012,33(4):1252-1259. |
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| Authors: | ZHAO Lu DENG Yi-rong DU Ying-xun and FU Xiang |
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| Institution: | State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China; Graduate University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China; Guilin Research Institute of Geology for Mineral Resources,Guilin 541004,China;State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China;State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China |
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| Abstract: | In this study, N-doped Ta2O5 samples which have strong absorption in visible domain, were prepared by the nitridation of Ta2O5 under NH4 flow and then added into photo-Fenton-like system to enhance Fe3+ reduction and atrazine degradation under visible light irradiation. The sample prepared at 700 degrees C under a NH3 flow rate of 0.3 L x min(-1) for 6 h showed the highest level of photocatalytic activity for Fe3+ reduction. The influence of various operational parameters such as the light intensity, input of N-doped Ta2O5, pH and initial concentrations of Fe3+, H2O2 and atrazine were investigated. And the changesof H2O2 during the degradation were measured to explain the effect of the operational parameters. The degradation ratio of atrazine reached 97% after 60 min irradiation by 500 W Xe lamp under the conditions of pH = 2.6, atrazine]0 = 18 mg x L(-1), H2O2]0 = 2.5 mmol x L(-1), Fe3+]0 = 0.5 mmol x L(-1) and the input of N-doped Ta2O5 = 0.6 g x L(-1). |
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| Keywords: | visible light Fenton-like system N-doped Ta2O5 Fe3+reduction atrazine |
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