SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (6): 1582-1590.DOI: 10.1016/j.cjche.2019.12.027

• Separation Science and Engineering • 上一篇    下一篇

Experimental and mathematical modeling of Cr(VI) removal using nano-magnetic Fe3O4-coated perlite from the liquid phase

Ismail M. Ahmed1, Mostafa M. Hamed2, Sayed S. Metwally2   

  1. 1 Chemistry Department, College of Science, Jouf University, Skaka, Saudi Arabia;
    2 Hot Laboratories and Waste Management Center, Atomic Energy Authority, 13759 Cairo, Egypt
  • 收稿日期:2019-08-30 修回日期:2019-12-01 出版日期:2020-06-28 发布日期:2020-07-29
  • 通讯作者: Sayed S. Metwally

Experimental and mathematical modeling of Cr(VI) removal using nano-magnetic Fe3O4-coated perlite from the liquid phase

Ismail M. Ahmed1, Mostafa M. Hamed2, Sayed S. Metwally2   

  1. 1 Chemistry Department, College of Science, Jouf University, Skaka, Saudi Arabia;
    2 Hot Laboratories and Waste Management Center, Atomic Energy Authority, 13759 Cairo, Egypt
  • Received:2019-08-30 Revised:2019-12-01 Online:2020-06-28 Published:2020-07-29
  • Contact: Sayed S. Metwally

摘要: Modification of perlite using nano-magnetic iron oxide was implemented to produce nano-magneticFe3O4-coated perlite composite (Fe3O4/Perlite). The prepared composite was characterized using Scanning Electron Microscopy, Fourier-Transform Infrared spectroscopy and Powder X-ray Fluorescence. The potentiality of both perlite and Fe3O4/Perlite composite to eliminate Cr(VI) from the environmentally relevant water was investigated. The influence of main factors which could affect the adsorption was studied including; pH of medium, shaking time and Cr(VI) ions concentration. The experimental outcome demonstrated that the modification of perlite by nano-magnetic Fe3O4 showed a significantly enhanced Cr(VI) removal efficiency relative to that of unmodified perlite. From the kinetic studies, the experimental data fitted well with the pseudo-second-order model. Moreover, it proposes that Langmuir isotherm is more adequate than the Freundlich isotherm for both perlite and modified perlite. The results recommended that Fe3O4/Perlite composite had a great potential as an economic and efficient adsorbent of Cr(VI) from contaminated water, which has huge application potential.

关键词: Nano-magnetic, Composite, Kinetics, Isotherm, Perlite, Adsorption

Abstract: Modification of perlite using nano-magnetic iron oxide was implemented to produce nano-magneticFe3O4-coated perlite composite (Fe3O4/Perlite). The prepared composite was characterized using Scanning Electron Microscopy, Fourier-Transform Infrared spectroscopy and Powder X-ray Fluorescence. The potentiality of both perlite and Fe3O4/Perlite composite to eliminate Cr(VI) from the environmentally relevant water was investigated. The influence of main factors which could affect the adsorption was studied including; pH of medium, shaking time and Cr(VI) ions concentration. The experimental outcome demonstrated that the modification of perlite by nano-magnetic Fe3O4 showed a significantly enhanced Cr(VI) removal efficiency relative to that of unmodified perlite. From the kinetic studies, the experimental data fitted well with the pseudo-second-order model. Moreover, it proposes that Langmuir isotherm is more adequate than the Freundlich isotherm for both perlite and modified perlite. The results recommended that Fe3O4/Perlite composite had a great potential as an economic and efficient adsorbent of Cr(VI) from contaminated water, which has huge application potential.

Key words: Nano-magnetic, Composite, Kinetics, Isotherm, Perlite, Adsorption