Fe3O4复合材料对Cd2+的吸附性能研究

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

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;
2. 陕西省矿产资源清洁高效转化与新材料工程研究中心, 陕西商洛 726000;
3. 湖南省益阳市南县检验检测中心, 湖南益阳 413000

基金项目:

陕西省教育厅项目(19JS026)

陕西省自然科学基础研究计划资助项目(2019JQ-156)

详细信息

作者简介:
宋月红,博士研究生,讲师。E-mail:s_yh1009@163.com

中图分类号: TB332
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- 文章访问数: 100
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- 被引次数: 0
出版历程
- 收稿日期: 2022-02-14
- 网络出版日期: 2022-09-13

Study on Adsorption Properties of Cd²⁺ by Fe₃O₄ Composite Materials

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

摘要

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%。
- Fe₃O₄ /
- 复合材料 /
- Cd²⁺ /
- 吸附性能
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.
- Fe₃O₄ /
- composite materials /
- cadmium ion /
- adsorption performance

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参考文献(17)

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