| 天然金红石光催化降解藏红T实验研究 |
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| 引用本文： | 李巧荣,鲁安怀,李宁,李改云,杨欣.天然金红石光催化降解藏红T实验研究[J].矿物岩石地球化学通报,2003,22(3):215-218,223. |
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| 作者姓名： | 李巧荣 鲁安怀 李宁 李改云 杨欣 |
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| 作者单位： | 1. 中国地质大学,材料科学与工程学院,北京,100083
2. 北京大学,地球与空间科学学院,北京,100871 |
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| 基金项目： | 国家重大基础研究前期研究专项 (2 0 0 1CCA0 2 40 0 )，国家自然科学基金资助项目 (4 0 172 0 2 2 ) |
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| 摘 要： | 以低压汞灯为光源研究了天然金红石悬浆体系中藏红T的脱色条件及其光催化反应动力学，讨论了溶液初始pH值、催化剂投入量、光强、气流量、催化剂粒径、反应气氛等实验条件对藏红T脱色速率的影响，阐述了实验过程中无机离子的生成情况。结果表明，该反应基本上符合一级反应动力学；在酸性条件下尤其是当溶液初始pH值为2．5时，藏红T的脱色速率要比在碱性和中性条件下快得多；增加光强度能较大地提高反应的降解速率；催化剂最佳投入量为1．3g／L；在氧化气氛下该反应比在非氧化气氛快得多；通入气体的流量在40L／h最合适；反应溶液中有氯离子溶出说明有机物中的含氯部分被降解。本研究为光催化作用降解有机污染物提供了新的途径。
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| 关 键 词： | 天然金红石 光催化降解 藏红T 实验研究 脱色 无机离子 有机污染物 废水处理 TiO2 二氧化钛 |
| 文章编号： | 1007-2802(2003)03-0215-04 |
The Photocatalysis Oxidation of Safranine T by Natural Rutile |
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| LI Qiao-rong ,LU An-huai ,LI Ning ,LI Gai -yun ,YANG Xin . School of Material Science and Engieering,China Unive rsity of Gescience,Beijing ,China, . Deparment of Geology and Space Sciences,Peking University,Beijing ,China.The Photocatalysis Oxidation of Safranine T by Natural Rutile[J].Bulletin of Mineralogy Petrology and Geochemistry,2003,22(3):215-218,223. |
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| Authors: | LI Qiao-rong LU An-huai LI Ning LI Gai -yun YANG Xin School of Material Science and Engieering China Unive rsity of Gescience Beijing China Deparment of Geology and Space Sciences Peking University Beijing China |
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| Institution: | LI Qiao-rong 1,LU An-huai 2,LI Ning 2,LI Gai -yun 1,YANG Xin 1 1. School of Material Science and Engieering,China Unive rsity of Gescience,Beijing 100083,China, 2. Deparment of Geology and Space Sciences,Peking University,Beijing 100 871,China |
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| Abstract: | In natural rutile suspension sys te m, the decolorization of safranine T and its reaction kinetics were studied usin g a lowpressure mercury vapor lamp as the light source. The effect of initial p H value of safranine T solution, dosage of catalyst, intensity of UV irradiation , granularity of the catalyst, airflow rate and reaction atmosphere on photocata lytic degration rate were investigated. The development of inorganic irons in th e experiment was discussed. The results showed that the decolorization rate of s afranine T in acidic condition was much higher than in neut and alkaline conditi ons,especially,when the pH value is 2.5. Enhancing intensity of UV irradiation c an improve the reaction rate greatly. In addition, the favourable dosages of catalystx is 1.3g/L and the reaction rate is much higher in oxidative atmosp here than that in reductive atmosphere.The appropriate airflow rate is 40L/h.Fin ally we observed the existence of Cl - in the solution,which indicated that th e organic contaminants can be mineralized into inorganic molecules and ions.We p rovided a new way to mineralize organic contaminants using photo-catalyzed meth ods. |
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| Keywords: | natural rutile degradation decol orization photocatalysis dye |
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