葡萄糖生物炭/海泡石复合物吸附净化Cr(Ⅵ)效能分析

兰州理工大学学报 ›› 2026, Vol. 52 ›› Issue (2): 63-69.

葡萄糖生物炭/海泡石复合物吸附净化Cr(Ⅵ)效能分析

罗玲玲, 周志康, 赵银旭, 周杰, 蔡进军^*

湘潭大学化工学院, 湖南湘潭 411105

收稿日期:2023-10-07 出版日期:2026-04-28 发布日期:2026-04-28
通讯作者: 蔡进军(1987-),男,湖南常德人,博士,教授,博导. Email:caijj@xtu.edu.cn
基金资助:
湖南省自然科学基金(2023JJ30573),湖南省大学生创新创业训练项目(S202310530106)

Preparation of glucose biochar and sepiolite composites for Cr (VI) removal from water

LUO Ling-ling, ZHOU Zhi-kang, ZHAO Yin-xu, ZHOU Jie, CAI Jin-jun

School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China

Received:2023-10-07 Online:2026-04-28 Published:2026-04-28

摘要/Abstract

摘要： 水体中的金属离子严重影响人类健康,吸附法在去除金属离子方面具有较大潜力.将葡萄糖与海泡石按一定比例混合200 ℃水热处理得到复合吸附剂(G9S1),探究Cr(Ⅵ)吸附性能与机理.扫描电镜(SEM)结果显示G9S1的棒状结构源自海泡石,常温下Cr(Ⅵ)吸附过程符合准二级动力学和Langmuir模型,最大吸附量为31.22 mg/g.X-射线光电子能谱(XPS)、红外光谱(FT-IR)、吸附动力学和等温线结果表明孔吸附、静电吸引、还原和络合的协同作用是去除Cr(Ⅵ)的主要机制,G9S1具有优异的稳定性,5次循环后Cr(Ⅵ)吸附量保持73.3%.为廉价吸附剂去除金属离子提供依据,G9S1与单一葡萄糖生物炭和海泡石相比有效提高吸附量.

关键词: 葡萄糖, 海泡石, 生物炭, 吸附, 重金属离子

Abstract: The presence of heavy metals in water poses a significant threat to human health, and adsorption has great potential in metallic ions removal. Glucose hydrochar sheathed sepiolite composite (G9S1) was obtained by hydrothermal process at 200 ℃ after mixing a certain concentration of sepiolite and glucose. The adsorption performance and mechanism of G9S1 for hexavalent chromium Cr (VI) were systematically investigated. Scanning electron microscopy (SEM) results indicate that G9S1 has an elongated rod-like shape with a rough surface from sepiolite. At ambient temperature, the Cr(VI) adsorption process conformed to the pseudo-second-order kinetic model and the Langmuir model, with a maximum adsorption capacity of 31.22 mg/g. The combined results from XPS, FT-IR, adsorption kinetics, and isotherms indicate that the main removal mechanism is attributed to synergistic effects from pore adsorption, electrostatic attraction, reduction, and complexation. G9S1 exhibits good recycling performance, retaining 73.3% of its Cr(VI) adsorption capacity after five cycles. This work provides a theoretical basis for metallic ions removal by cost-effective adsorbents. Compared with individual glucose-derived biochar and sepiolite, the amount of G9S1 is highly enhanced.

Key words: glucose, sepiolite, biochar, adsorption, heavy metal ions

中图分类号:

TQ424

罗玲玲, 周志康, 赵银旭, 周杰, 蔡进军. 葡萄糖生物炭/海泡石复合物吸附净化Cr(Ⅵ)效能分析[J]. 兰州理工大学学报, 2026, 52(2): 63-69.

LUO Ling-ling, ZHOU Zhi-kang, ZHAO Yin-xu, ZHOU Jie, CAI Jin-jun. Preparation of glucose biochar and sepiolite composites for Cr (VI) removal from water[J]. Journal of Lanzhou University of Technology, 2026, 52(2): 63-69.

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链接本文: https://journal.lut.edu.cn/CN/

https://journal.lut.edu.cn/CN/Y2026/V52/I2/63

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