SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 68 ›› Issue (4): 16-26.DOI: 10.1016/j.cjche.2024.01.004

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Tetraethylenepentamine-functionalized magnetic mesoporous composites as a novel adsorbent for the removal Cr(III)-ethylenediaminetetraacetic acid in complex solution

Zhi Hu1,2, Jiahong Wang1,2, Tongtong Sun1,2   

  1. 1. School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China;
    2. Shaanxi Key Laboratory of Green Preparation and Functionalization of Inorganic Materials, Xi'an 710021, China
  • 收稿日期:2023-09-25 修回日期:2024-01-02 出版日期:2024-04-28 发布日期:2024-06-28
  • 通讯作者: Jiahong Wang,E-mail address:wangjiahong@sust.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (22076111), and Key Research and Development Program of Shaanxi (2024GX-YBXM-427), China.

Tetraethylenepentamine-functionalized magnetic mesoporous composites as a novel adsorbent for the removal Cr(III)-ethylenediaminetetraacetic acid in complex solution

Zhi Hu1,2, Jiahong Wang1,2, Tongtong Sun1,2   

  1. 1. School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China;
    2. Shaanxi Key Laboratory of Green Preparation and Functionalization of Inorganic Materials, Xi'an 710021, China
  • Received:2023-09-25 Revised:2024-01-02 Online:2024-04-28 Published:2024-06-28
  • Contact: Jiahong Wang,E-mail address:wangjiahong@sust.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (22076111), and Key Research and Development Program of Shaanxi (2024GX-YBXM-427), China.

摘要: A novel tetraethylenepentamine (TEPA) functionalized magnetic mesoporous silica adsorbent (FNMs/TEPA) was prepared for the adsorption of Cr(III)-ethylenediaminetetraacetic acid (EDTA) from wastewater. The characterization of the prepared adsorbent certified that TEPA was modified onto the magnetic mesoporous silicon (FNMs), while FNMs/TEPA maintained the ordered mesoporous and pristine magnetic properties. The batch adsorption experiments demonstrated that TEPA significantly enhanced the removal capacity of the adsorbent for Cr(III)-EDTA. FNMs/TEPA exhibited an excellent adsorption property (13.84 mg·g-1) at pH 4.0. Even in the presence of high concentrations of coexisting ions and organic acids, the adsorption performance of FNMs/TEPA was stable. Experimental characterization and DFT demonstrated that the adsorption of Cr(III)-EDTA was ascribed to the electrostatic interaction, hydrogen bonding, and complexation between Cr(III)-EDTA and amino groups on the adsorbent surface. The analysis of the independent gradient model (IGM) shows that electrostatic interaction is the main mode of action in the adsorption process. Moreover, FNMs/TEPA demonstrated remarkable reusability in three regeneration cycles. These findings indicated that FNMs/TEPA possessed excellent application prospects in the disposal of wastewater containing Cr(III)-EDTA.

关键词: TEPA functionalized magnetic mesoporous silicon, Adsorption, Cr(III)-EDTA, Density functional theory calculations

Abstract: A novel tetraethylenepentamine (TEPA) functionalized magnetic mesoporous silica adsorbent (FNMs/TEPA) was prepared for the adsorption of Cr(III)-ethylenediaminetetraacetic acid (EDTA) from wastewater. The characterization of the prepared adsorbent certified that TEPA was modified onto the magnetic mesoporous silicon (FNMs), while FNMs/TEPA maintained the ordered mesoporous and pristine magnetic properties. The batch adsorption experiments demonstrated that TEPA significantly enhanced the removal capacity of the adsorbent for Cr(III)-EDTA. FNMs/TEPA exhibited an excellent adsorption property (13.84 mg·g-1) at pH 4.0. Even in the presence of high concentrations of coexisting ions and organic acids, the adsorption performance of FNMs/TEPA was stable. Experimental characterization and DFT demonstrated that the adsorption of Cr(III)-EDTA was ascribed to the electrostatic interaction, hydrogen bonding, and complexation between Cr(III)-EDTA and amino groups on the adsorbent surface. The analysis of the independent gradient model (IGM) shows that electrostatic interaction is the main mode of action in the adsorption process. Moreover, FNMs/TEPA demonstrated remarkable reusability in three regeneration cycles. These findings indicated that FNMs/TEPA possessed excellent application prospects in the disposal of wastewater containing Cr(III)-EDTA.

Key words: TEPA functionalized magnetic mesoporous silicon, Adsorption, Cr(III)-EDTA, Density functional theory calculations