| 多孔氧化镁/硅藻土吸附材料的制备及其吸附性能 |
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| 引用本文： | 苏琪,刘柏雄,谢泽明,邝梦杰,李玮,张丽娜.多孔氧化镁/硅藻土吸附材料的制备及其吸附性能[J].有色金属科学与工程,2018,9(3):53-57. |
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| 作者姓名： | 苏琪 刘柏雄 谢泽明 邝梦杰 李玮 张丽娜 |
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| 作者单位： | a.江西理工大学, 材料科学与工程学院, 江西 赣州 341000 |
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| 基金项目： | 国家自然科学基金资助项目51664023江西省科技厅基金资助项目20161BAB206144江西省教育厅基金资助项目GJJ150688 |
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| 摘 要： | 氧化镁对重金属离子和有机染料都具有良好的吸附性能，通过在改性硅藻土孔道中负载乙酸镁，制定合理的煅烧工艺制备出氧化镁/硅藻土多孔吸附材料. TG-DTA分析结果表明乙酸镁分解完全的最低温度为385 ℃，煅烧温度为400 ℃，得到物相纯净的氧化镁/硅藻土多孔吸附材料；当乙酸镁与硅藻土质量比分别为3:5，硅藻土所有孔道几乎都负载了MgO；所制备的氧化镁/硅藻土多孔吸附材料对有机染料具有优异的吸附性能，采用Langmuir等温吸附模型估算其对刚果红的饱和吸附量为2 591.6 mg/g.
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| 关 键 词： | 氧化镁 硅藻土 多孔材料 吸附材料 |
| 收稿时间： | 2017-11-18 |
Study on the preparation of porous MgO/diatomite adsorption material and its adsorption properties |
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| Affiliation: | a.School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Chinab.College of Applied Science, Jiangxi University of Science and Technology, Ganzhou 341000, China |
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| Abstract: | MgO possesses good adsorption properties for heavy metal ions and organic dyes. MgO/Diatomite porous material was synthesized by reasonable calcination once magnesium acetate was loaded in the pores of the modified diatomite. TG-DTA analysis results showed that pure MgO/diatomite porous material was obtained when the minimum temperature for complete decomposition of magnesium acetate was 385 ℃ and its calcination temperature was 400 ℃. Almost all channels of diatomaceous earth were loaded with MgO when the mass ratio of magnesium acetate to diatomite was 3:5. The synthesized porous MgO/diatomite with adsorption performance showed excellent adsorption properties for organic dyes. The saturated adsorption capacity of MgO/diatomite adsorption materials for Congo red was estimated as 2 591.6 mg/g according to Langmuir isotherm adsorption model. |
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