| Fe3O4复合材料对Cd2+的吸附性能研究 |
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| 引用本文： | 宋月红,刘明勤,黄子豪,徐辉,代卫丽.Fe3O4复合材料对Cd2+的吸附性能研究[J].材料开发与应用,2022,37(4):27-33. |
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| 作者姓名： | 宋月红 刘明勤 黄子豪 徐辉 代卫丽 |
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| 作者单位： | 1. 商洛学院 化学工程与现代材料学院, 陕西省尾矿资源综合利用重点实验室, 陕西 商洛 726000; |
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| 摘 要： | 在碱性条件下,以共沉淀法合成Fe3O4,再以正硅酸乙酯和二乙烯三胺为原料,制备出Fe3O4复合材料(Fe3O4-SiO2-NH2)。采用FT-IR、VSM和SEM对其结构进行表征,并研究了复合材料对Cd2+的吸附性能。实验结果表明,在T=55℃、t=60 min、Cd2+溶液的初始浓度为100 mg·L-1、Fe3O4-SiO2-NH2的添加量为0.1 g时,该材料对Cd2+的吸附容量为71.4 mg·g-1。其吸附动力学行为更符合准二级动力学,热力学更适合用Langmuir等温吸附模型描述。Fe3O4-SiO2-NH2吸附Cd2+后洗脱再生,经过5次循环使用后,其对Cd2+的去除率仍然大于70%。
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| 关 键 词： | Fe3O4 复合材料 Cd2+ 吸附性能 |
| 收稿时间： | 2022-02-14 |
Study on Adsorption Properties of Cd2+ by Fe3O4 Composite Materials |
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| Affiliation: | 1. Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, College of Chemical Engineering and Modern Materials, Shangluo University, Shangluo 726000, China;2. Shaanxi Engineering Research Center for Mineral Resources Clean & Efficient Conversion and New Materials, Shangluo 726000, China;3. Nanxian Inspection and Testing Center of Yiyang City in Hunan Province, Yiyang 413000, China |
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| Abstract: | The Fe3O4 is prepared by coprecipitation under the alkaline conditions, and then the Fe3O4 composite materials (Fe3O4-SiO2-NH2) are synthesized with tetraethyl orthosilicate and diethylenetriamine as the main raw materials. FT-IR, VSM and SEM are employed to characterize their structures, and the adsorption performance of Cd2+ by Fe3O4-SiO2-NH2 composites are studied. The results showed that under the conditions of T=55℃, contact time of 60 min, an initial Cd2+ concentration of 100 mg·L-1 and an amount of Fe3O4-SiO2-NH2 composite of 0.1 g, the adsorbent capacity of the composite for Cd2+ is found to be 71.4 mg·g-1. The adsorption kinetic behavior of Fe3O4-SiO2-NH2 composites for Cd2+ is consistent with the quasi second-order kinetic and thermodynamics is suitable to be described by Langmuir isothermal adsorption model. The removal rate of Cd2+ is still above 70% after five times regeneration of Fe3O4-SiO2-NH2 composite materials. |
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