Zr掺杂介孔硅对亚甲基蓝的选择性吸附性能 |
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引用本文: | 沈 浩,黄 茜,冯锐捷,商 铭,吕仁亮,,徐彩丽,李 萍,陈苏芳,韩庆文.Zr掺杂介孔硅对亚甲基蓝的选择性吸附性能[J].武汉工程大学学报,2023,45(1):25-34. |
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作者姓名: | 沈 浩 黄 茜 冯锐捷 商 铭 吕仁亮 徐彩丽 李 萍 陈苏芳 韩庆文 |
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作者单位: | 1. 武汉工程大学化工与制药学院,绿色化工过程教育部重点实验室(武汉工程大学),湖北 武汉 430205;2. 湖北三峡实验室,湖北 宜昌 443007;3. 武汉工程大学邮电与信息工程学院,湖北 武汉 430074 |
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摘 要: |
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Selective Adsorption of Methylene Blue on Zr-Doped Mesoporous Silica |
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Affiliation: | 1. School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology;Key Laboratory of Green Chemical Process (Wuhan Institute of Technology),Ministry of Education, Wuhan 430205,China;2. Hubei Three Gorges Laboratory, Yichang 443007,China;3. The College of Post and Telecommunication of Wuhan Institute of Technology, Wuhan 430074,China
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Abstract: | Mesoporous silica with worm-like channels was synthesized using hydroxyethyl cellulose as template and sodium metasilicate as silicon source. Adsorbents with different Zr content were prepared by direct synthesis method (named as Zr-HECMS-D)and post-grafting method (named as Zr-HECMS-P)respectively. Selective adsorption performance of each adsorbent for methylene blue in methylene blue/methyl orange mixed solution was evaluated. The results show that the optimum pH value of the adsorption process is 10.Under acidic conditions,Zr-HECMS-D with Zr/Si molar ratio of 0.02 and Zr-HECMS-P with Zr/Si molar ratio of 0.01 have the best selective adsorption performances, and the methylene blue removal efficiency is proportional to the proportion of O in Zr-O-Si on the surface of adsorbents as well. The metal doping amount has little effect on the selectivity under alkaline conditions. The adsorption process is conformed to the pseudo-second-order kinetic model, and the adsorption equilibrium is conformed to the Langmuir adsorption model.
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