| 水溶液中新生态MnO2对苯酚的吸附作用 |
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| 引用本文： | 张立珠,马军,陈忠林,余敏. 水溶液中新生态MnO2对苯酚的吸附作用[J]. 化工学报, 2006, 57(12): 2959-2963 |
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| 作者姓名： | 张立珠 马军 陈忠林 余敏 |
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| 作者单位： | 哈尔滨工业大学市政环境工程学院,黑龙江,哈尔滨,150090;哈尔滨工业大学应用化学系,黑龙江,哈尔滨,150001;哈尔滨工业大学市政环境工程学院,黑龙江,哈尔滨,150090 |
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| 基金项目： | 黑龙江省哈尔滨市青年科学基金 |
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| 摘 要： | 研究了新生态MnO2对水溶液中苯酚的吸附作用.对一些影响因素，如pH、高价正离子Al3+和高价负离子PO3-4进行了考察，并探讨了反应机理.实验结果表明，新生态MnO2对苯酚的吸附等温线为“S”形，对苯酚的吸附过程包括表面吸附和孔内扩散两部分.pH在6～9的范围内，随pH升高苯酚吸附量下降，但变化不大;当pH≥10时，苯酚去除率几乎降为零.少量铝离子有利于苯酚的吸附.因为铝离子吸附在新生态MnO2表面，改变了新生态MnO2的表面性质，有利于苯酚的吸附.磷酸根离子极易与苯酚络合而带负电荷，不利于新生态MnO2对苯酚的吸附.
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| 关 键 词： | 新生态MnO2 苯酚 吸附 |
| 文章编号： | 0438-1157（2006）12-2959-05 |
| 收稿时间： | 2005-12-11 |
| 修稿时间： | 2005-12-112006-07-04 |
Adsorption of phenol by MnO2 formed in situ |
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| ZHANG Lizhu,MA Jun,CHEN Zhonglin,YU Min. Adsorption of phenol by MnO2 formed in situ[J]. Journal of Chemical Industry and Engineering(China), 2006, 57(12): 2959-2963 |
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| Authors: | ZHANG Lizhu MA Jun CHEN Zhonglin YU Min |
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| Affiliation: | 1. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang , China ; 2. Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China |
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| Abstract: | The effects of pH,Al3+ and PO3-4 on the adsorption of phenol by MnO2 formed in situ were studied in aqueous solution.The behavior and adsorption mechanism were investigated.The adsorption isotherm was of “S” shape.The adsorption process of phenol on MnO2 formed in situ was divided into adsorption on the external surface of MnO2 formed in situ and diffusion to the interior of MnO2.Phenol adsorption capacity decreased slightly with increasing pH in the range of 6—9，but declined to nearly zero at pH≥10.The presence of a small amount of aluminum ion adsorbed onto the oxide surface changed the surface characteristics, which promoted the adsorption of phenol.Phosphate inhibited the adsorption of phenol by forming a negatively charged complex with phenol. |
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| Keywords: | MnO2 formed in situ phenol adsorption |
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