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Article
Synergistic effects of activated carbon and nano-zerovalent copper on the performance of hydroxyapatite-alginate beads for the removal of As3+ from aqueous solution
Journal of Cleaner Production
  • Jibran Iqbal, Zayed University
  • Noor S. Shah, COMSATS University Islamabad
  • Murtaza Sayed, University of Peshawar
  • Muhammad Imran, COMSATS University Islamabad
  • Nawshad Muhammad, COMSATS Institute of Information Technology Lahore
  • Fares M. Howari, Zayed University
  • Sara A. Alkhoori, Zayed University
  • Javed Ali Khan, University of Peshawar
  • Zia Ul Haq Khan, COMSATS University Islamabad
  • Amit Bhatnagar, Itä-Suomen yliopisto
  • Kyriaki Polychronopoulou, Khalifa University of Science and Technology
  • Issam Ismail, Khalifa University of Science and Technology
  • Mohammad Abu Haija, Khalifa University of Science and Technology
Document Type
Article
Publication Date
10-20-2019
Abstract

© 2019 Elsevier Ltd In this study, activated carbon (AC) and nano-zerovalent copper (nZVCu) functionalized hydroxyapatite (HA) and alginate beads were synthesized and used for the removal of As3+ from aqueous solution. The characterization by X-ray diffraction, scanning electron microscopy, X-ray energy dispersive spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, high resolution transmission electron microscopy, BET surface area analysis, thermogravimetric analysis, and Fourier transform infrared spectroscopy revealed successful formation of the AC/nZVCu/HA-alginate, nZVCu/HA-alginate, AC/HA-alginate, and HA-alginate beads. The scanning electron microscopy and surface analysis revealed the prepared beads to be highly mesoporous which led to the maximum adsorption of As3+, i.e., 13.97, 29.33, 30.96, and 39.06 mg/g by HA-alginate, AC/HA-alginate, nZVCu/HA-alginate, and AC/nZVCu/HA-alginate beads, respectively. The thermogravimteric analysis showed the nZVCu/HA-alginate beads to be highly stable while the AC composite beads as the least stable to heat treatment. The HA-alginate beads achieved 39% removal of As3+, however, removal efficiency was promoted to 95% by coupling AC and nZVCu with HA-alginate beads at a reaction time of 120 min. The removal of As3+ by the prepared AC & nZVCu coupled HA-alginate beads was promoted with increasing [As3+]0 and [AC/nZVCu/HA-alginate]0. The pH of aqueous solution significantly influenced the removal of As3+ by AC/nZVCu/HA-alginate beads and maximum removal was achieved at pH 5.8. Freundlich adsorption isotherm and pseudo-second-order kinetic models were found to best fit the removal of As3+ by the synthesized beads. The high performance of AC/nZVCu/HA-alginate beads in the removal of As3+ even after seven cyclic treatment as well as least leaching of Cu ions into aqueous solution suggest enhanced reusability and stability of HA-alginate beads by coupling with AC and nZVCu. The results suggest that the synthesized beads have good potential for the removal of As3+ from aqueous solutions.

Publisher
Elsevier Ltd
Disciplines
Keywords
  • Activated carbon,
  • As 3+,
  • Hydroxyapatite-alginate beads,
  • Nano-zerovalent copper,
  • Water treatment
Scopus ID
85068505113
Indexed in Scopus
Yes
Open Access
No
https://doi.org/10.1016/j.jclepro.2019.06.316
Citation Information
Jibran Iqbal, Noor S. Shah, Murtaza Sayed, Muhammad Imran, et al.. "Synergistic effects of activated carbon and nano-zerovalent copper on the performance of hydroxyapatite-alginate beads for the removal of As3+ from aqueous solution" Journal of Cleaner Production Vol. 235 (2019) p. 875 - 886 ISSN: <a href="https://v2.sherpa.ac.uk/id/publication/issn/0959-6526" target="_blank">0959-6526</a>
Available at: http://works.bepress.com/fares-howari/28/