Issue 5, 2022

Engineering GO@Zn–Hap@CA porous heterostructure for ultra-fast and ultra-high adsorption efficacy: investigation towards the remediation of chromium and lead

Abstract

In the contemporary era, research into the structures involving emerging 2D materials, inorganic components, and polymers has evolved at a tremendous pace for environmental protection and sustainability. Herein, this study reports the design and fabrication of a GO@Zn–Hap@CA porous heterostructured adsorbent using 2D graphene oxide (GO), inorganic zinc-doped hydroxyapatite (Zn–Hap) and cellulose acetate (CA) via a crosslinking approach for the removal of Cr(VI) and Pb(II) ions. The synthesized raw material and the developed heterostructured adsorbent were intensely characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), field emission scanning electron microscopy (FE-SEM), and N2 gas adsorption–desorption analysis. The fabricated GO@Zn–Hap@CA heterostructure exhibited high roughness, high surface area and mesoporous texture and thereby has shown an enhanced capture of Cr(VI) and Pb(II) ions. Importantly, it possessed an ultrahigh maximum adsorption capacity of 384 mg g−1 and 400 mg g−1 for Cr(VI) and Pb(II) at pH = 2 and pH = 5, respectively. Investigation of the adsorption isotherm and kinetics indicate that both Cr(VI) and Pb(II) adsorption fitted well with the Freundlich isotherm model and pseudo-second-order kinetic model. While probing the kinetics, the equilibrium was observed to reach at an ultrafast duration, for instance, 50 min for chromium and 60 min for lead. A study on the effect of the co-existing ions revealed that the cations and anions had a less significant effect on Cr(VI) and Pb(II) adsorption. Such results offer insights into the intriguing potential of GO@Zn–Hap@CA for the elimination of hazardous pollutants from the aquatic environment.

Graphical abstract: Engineering GO@Zn–Hap@CA porous heterostructure for ultra-fast and ultra-high adsorption efficacy: investigation towards the remediation of chromium and lead

Supplementary files

Article information

Article type
Paper
Submitted
22 6月 2022
Accepted
29 9月 2022
First published
19 10月 2022
This article is Open Access
Creative Commons BY-NC license

Environ. Sci.: Adv., 2022,1, 827-848

Engineering GO@Zn–Hap@CA porous heterostructure for ultra-fast and ultra-high adsorption efficacy: investigation towards the remediation of chromium and lead

M. Mahmud, Md. S. Hossain, M. B. Mobarak, Md. S. Quddus, M. S. Bashar, U. S. Akhtar, S. A. Jahan, D. Islam and S. Ahmed, Environ. Sci.: Adv., 2022, 1, 827 DOI: 10.1039/D2VA00142J

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements