无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2024, Vol. 56 ›› Issue (2): 111-120.doi: 10.19964/j.issn.1006-4990.2023-0221

• 环境·健康·安全 • 上一篇    下一篇

室温制备铁基有机金属框架吸附三价砷的研究

贺翌鹏(), 熊晨曦, 王一平, 李军, 金央()   

  1. 四川大学化学工程学院,四川 成都 610065
  • 收稿日期:2023-04-17 出版日期:2024-02-10 发布日期:2024-02-06
  • 通讯作者: 金央(1984— ),女,副教授,研究方向为分离和过程强化;E-mail:jinyangyoung@126.comjinyangyoung@scu.edu.cn
  • 作者简介:贺翌鹏(1998— ),男,硕士,研究方向为无机化工材料制备及工艺研究;E-mail:1078878254@qq.com
  • 基金资助:
    国家重点研发计划项目(2022YFC2904703);四川省重点研发项目(21ZDYF4086)

Research on preparation of iron-based organic metal-organic framework at room temperature for adsorption of trivalent arsenic

HE Yipeng(), XIONG Chenxi, WANG Yiping, LI Jun, JIN Yang()   

  1. School of Chemical Engineering,Sichuan University,Chengdu 610065,China
  • Received:2023-04-17 Published:2024-02-10 Online:2024-02-06

摘要:

地下水中的砷污染日益严重,摄入高砷地下水会严重危害人体健康。因此,高效去除水中的砷具有重要意义。在室温下合成了铁基金属有机框架MIL-88A用于吸附水中的As(Ⅲ)。通过XRD、SEM、XPS和FT-IR等手段对MIL-88A进行了表征,研究了MIL-88A吸附As(Ⅲ)过程的动力学、热力学参数。结果表明:MIL-88A能够实现对水中As(Ⅲ)的高效吸附,最大吸附量为286.37 mg/g,高于现有同类型吸附剂;MIL-88A吸附As(Ⅲ)过程的动力学和等温线数据分别符合准二级动力学模型和Freundlich模型,说明MIL-88A对As(Ⅲ)的吸附是化学吸附与多层吸附相结合的过程。结合表征分析可以得出,MIL-88A表面的羧基可以吸附As(Ⅲ)并将其氧化成As(Ⅴ),As(Ⅴ)通过氢键继续吸附As(Ⅲ)形成多层吸附。该研究为高效脱除水中As(Ⅲ)提供了理论参考。

关键词: 砷吸附, 水处理, 有机金属框架, MIL-88A

Abstract:

Arsenic pollution of groundwater is becoming increasingly serious,and drinking high-arsenic groundwater will seriously endanger human health.Therefore,it is of great significance to efficiently remove arsenic from water.The iron-based metal-organic framework MIL-88A was synthesized at room temperature for adsorbing As(Ⅲ) from water.MIL-88A was characterized by XRD,SEM,XPS and FT-IR.The kinetics and thermodynamics parameters of MIL-88A adsorbing As(Ⅲ) were studied.The experimental results showed that MIL-88A could efficiently adsorb As(Ⅲ) from water with the maximum adsorption capacity up to 286.37 mg/g,which was higher than that of similar adsorbents.The adsorption kinetic and isotherm data of MIL-88A were corresponded to pseudo-second-order kinetics model and Freundlich model,respectively,indicating that the adsorption process of MIL-88A to As(Ⅲ) was a combination of chemical adsorption and multi-layer adsorption.Combining with the characterization analysis,it was concluded that the carboxyl groups on the surface of MIL-88A could oxidatively adsorb As(Ⅲ) and oxidated to generate As(V),and As(V) adsorbed on the surface of the material could further adsorb As(Ⅲ) through hydrogen bonds,forming a multi-layer adsorption.This paper provided a theoretical reference for the efficient removal of As(Ⅲ) from water.

Key words: arsenic removal, aqueous solution, MOFs, MIL-88A

中图分类号: