Allyl triphenyl phosphonium bromide based DES-functionalized carbon nanotubes for the removal of mercury from water

AlOmar MK 1 , Alsaadi MA 2 , Hayyan M 1 , Akib S 3 , Ibrahim M 4 , Hashim MA 5

Affiliations 

  • 1 Department of Civil Engineering, University of Malaya, Kuala Lumpur, 50603, Malaysia; University of Malaya Centre for Ionic Liquids (UMCiL), University Malaya, Kuala Lumpur, 50603, Malaysia
  • 2 University of Malaya Centre for Ionic Liquids (UMCiL), University Malaya, Kuala Lumpur, 50603, Malaysia; Nanotechnology & Catalysis Research Centre (NANOCAT), IPS Building, University of Malaya, 50603, Kuala Lumpur, Malaysia. Electronic address: mdsd68j@gmail.com
  • 3 School of Energy, Geoscience, Infrastructure and Society (EGIS), Heriot-Watt University Malaysia, 62200, Putrajaya, Malaysia
  • 4 Nanotechnology & Catalysis Research Centre (NANOCAT), IPS Building, University of Malaya, 50603, Kuala Lumpur, Malaysia
  • 5 University of Malaya Centre for Ionic Liquids (UMCiL), University Malaya, Kuala Lumpur, 50603, Malaysia; Department of Chemical Engineering, University of Malaya, Kuala Lumpur, 50603, Malaysia
Chemosphere, 2017 Jan;167:44-52.
PMID: 27710842 DOI: 10.1016/j.chemosphere.2016.09.133

Abstract

Recently, deep eutectic solvents (DESs) have shown their new and interesting ability for chemistry through their involvement in variety of applications. This study introduces carbon nanotubes (CNTs) functionalized with DES as a novel adsorbent for Hg(2+) from water. Allyl triphenyl phosphonium bromide (ATPB) was combined with glycerol as the hydrogen bond donor (HBD) to form DES, which can act as a novel CNTs functionalization agent. The novel adsorbent was characterized using Raman, FTIR, XRD, FESEM, EDX, BET surface area, TGA, TEM and Zeta potential. Response surface methodology was used to optimize the removal conditions for Hg(2+). The optimum removal conditions were found to be pH 5.5, contact time 28 min, and an adsorbent dosage of 5 mg. Freundlich isotherm model described the adsorption isotherm of the novel adsorbent, and the maximum adsorption capacity obtained from the experimental data was 186.97 mg g(-1). Pseudo-second order kinetics describes the adsorption rate order.

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

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