Chitosan magnetic graphene grafted polyaniline doped with cobalt oxide for removal of Arsenic(V) from water

Gabris MA 1 , Rezania S 2 , Rafieizonooz M 3 , Khankhaje E 4 , Devanesan S 5 , AlSalhi MS 5 Show all authors , Aljaafreh MJ 5 , Shadravan A 6

Affiliations 

  • 1 School of Biosystems Engineering and Food Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, PR China
  • 2 Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea. Electronic address: [email protected]
  • 3 Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea
  • 4 Faculty of Civil Engineering Universiti Teknologi Malaysia, 81310, UTM Skudai, Johor Bahru, Malaysia
  • 5 Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box -2455, Riyadh, 11451, Saudi Arabia
  • 6 Department of Industrial and Systems Engineering, Texas A&M University, College Station, TX, 77843, USA
Environ Res, 2022 May 01;207:112209.
PMID: 34653412 DOI: 10.1016/j.envres.2021.112209

Abstract

The present study reports the successful functionalization/magnetization of bio-polymer to produce chitosan-magnetic graphene oxide grafted polyaniline doped with cobalt oxide (ChMGOP-Co3O4). Analytical techniques furrier transform infra-red (FT-IR), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) were used to confirm the formation of ChMGOP-Co3O4. The effects of several experimental factors (solution pH, adsorbent dosage and coexisting ions) on the uptake of As(V) ions using ChMGOP-Co3O4 were examined through batch experiments. As(V) removal process was validated by experimentally and theoretically investigating the adsorption capacity, rate, and thermal effects. Thermodynamic parameters such as free energy (ΔG°), entropy (ΔS°) and enthalpy (ΔH°) were also calculated and were used to explain the mechanism of adsorption. Based on the results, the sorbent showed a high adsorption capacities (90.91 mg/g) at favorable neutral pH and superior removal efficiencies as high as 89% within 50 min. In addition, the adsorption isotherm followed the Langmuir isotherm in compare to the Freundlich, due to its higher R2 value (0.992 

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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