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Enhanced Adsorption of Selenium Ions from Aqueous Solution Using Iron Oxide Impregnated Carbon Nanotubes

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journal contribution
submitted on 2023-03-15, 11:52 and posted on 2023-07-13, 10:01 authored by Omer Y. Bakather, Ahmad Kayvani Fard, Ihsanullah, Majeda Khraisheh, Mustafa S. Nasser, Muataz Ali Atieh

The aim of this research was to investigate the potential of raw and iron oxide impregnated carbon nanotubes (CNTs) as adsorbents for the removal of selenium (Se) ions from wastewater. The original and modified CNTs with different loadings of Fe2O3 nanoparticles were characterized using high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), X-ray diffractometer (XRD), Brunauer, Emmett, and Teller (BET) surface area analyzer, thermogravimetric analysis (TGA), zeta potential, and energy dispersive X-ray spectroscopy (EDS). The adsorption parameters of the selenium ions from water using raw CNTs and iron oxide impregnated carbon nanotubes (CNT-Fe2O3) were optimized. Total removal of 1 ppm Se ions from water was achieved when 25 mg of CNTs impregnated with 20 wt.% of iron oxide nanoparticles is used. Freundlich and Langmuir isotherm models were used to study the nature of the adsorption process. Pseudo-first and pseudo-second-order models were employed to study the kinetics of selenium ions adsorption onto the surface of iron oxide impregnated CNTs. Maximum adsorption capacity of the Fe2O3 impregnated CNTs, predicted by Langmuir isotherm model, was found to be 111 mg/g. This new finding might revolutionize the adsorption treatment process and application by introducing a new type of nanoadsorbent that has super adsorption capacity towards Se ions. 

Other information

Published in: Bioinorganic Chemistry and Applications  
License: http://creativecommons.org/licenses/by/4.0 
See article on publisher's website: http://dx.doi.org/10.1155/2017/4323619

History

Language

  • English

Publisher

Hindawi

Publication Year

  • 2017

Institution affiliated with

  • Hamad Bin Khalifa University
  • Qatar University

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