辽宁石油化工大学学报 ›› 2023, Vol. 43 ›› Issue (3): 14-20.DOI: 10.12422/j.issn.1672-6952.2023.03.003

• 化学与化学工程 • 上一篇    下一篇

壳聚糖⁃稀土⁃生物炭对水体Cr(Ⅵ)的吸附性能分析

孟阳(), 魏太庆, 艾丹, 王博, 范志平()   

  1. 辽宁石油化工大学 环境与安全工程学院,辽宁 抚顺 113001
  • 收稿日期:2021-10-27 修回日期:2021-12-16 出版日期:2023-06-25 发布日期:2023-06-25
  • 通讯作者: 范志平
  • 作者简介:孟阳(1996⁃),男,硕士研究生,从事环境修复材料制备方面的研究;E⁃mail:my18642362370@163.com
  • 基金资助:
    国家自然科学基金项目(41977074)

Adsorption Performance of Chitosan⁃Rare Earth⁃Biochar Composite for Cr(Ⅵ) in Water

Yang Meng(), Taiqing Wei, Dan Ai, Bo Wang, Zhiping Fan()   

  1. School of Environmental and Safety Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China
  • Received:2021-10-27 Revised:2021-12-16 Published:2023-06-25 Online:2023-06-25
  • Contact: Zhiping Fan

摘要:

以玉米秸秆为生物炭原料,通过壳聚糖和稀土对其改性,分别制备了壳聚糖?氯化镧?生物炭复合材料(CBC?La)和壳聚糖?氯化铈?生物炭复合材料(CBC?Ce)。采用XRF、FT?IR和XRD对CBC?La和CBC?Ce的结构与性能进行分析,探究了不同吸附条件下对水体Cr(Ⅵ)的吸附性能。结果表明,Langmuir方程能够很好地模拟等温吸附行为,准一级动力学方程的拟合度较高,CBC?La和CBC?Ce的平衡吸附量理论值分别为21.08、19.16 mg/g,表现出良好的吸附效果。解吸实验结果表明,CBC?La和CBC?Ce具有重复使用的可能性;吸附机制主要包括静电作用、氢键作用和离子交换。实验证明,壳聚糖?稀土?生物炭复合材料对去除水体Cr(Ⅵ)具有良好的应用前景。

关键词: 生物炭, 氯化镧, 氯化铈, 壳聚糖, 六价铬, 吸附

Abstract:

Using corn straw as raw material of biochar and modified with chitosan and rare earth, chitosan?lanthanum chloride?biochar composites and chitosan?cerium chloride?biochar composites were prepared respectively. The structure and performance of CBC?La and CBC?Ce were analyzed by XRF, FT?IR and XRD. The adsorption properties of Cr(Ⅵ) in water under different adsorption conditions were investigated. The experimental results show that the Langmuir equation can simulate the isothermal adsorption behavior well, and the quasi?first?order kinetic equation has a higher fitting degree. The theoretical equilibrium adsorption capacity are 21.08 mg/g and 19.16 mg/g, which is close to the actual value. The desorption experiments show that CBC?La and CBC?Ce had the possibility of reuse. The adsorption mechanism mainly includes electrostatic adsorption, complexation and ion exchange. The experimental results show that the chitosan?rare earth?biochar composite material has a good application prospect in the removal of Cr(Ⅵ) from water.

Key words: Biochar, Lanthanum chloride, Cerium chloride, Chitosan, Cr(Ⅵ), Adsorb

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引用本文

孟阳, 魏太庆, 艾丹, 王博, 范志平. 壳聚糖⁃稀土⁃生物炭对水体Cr(Ⅵ)的吸附性能分析[J]. 辽宁石油化工大学学报, 2023, 43(3): 14-20.

Yang Meng, Taiqing Wei, Dan Ai, Bo Wang, Zhiping Fan. Adsorption Performance of Chitosan⁃Rare Earth⁃Biochar Composite for Cr(Ⅵ) in Water[J]. Journal of Liaoning Petrochemical University, 2023, 43(3): 14-20.

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               https://journal.lnpu.edu.cn/CN/Y2023/V43/I3/14