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

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 Hg2+ from water. Allyl triphenyl phosphonium bromide...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2017-01, Vol.167, p.44-52
Main Authors: AlOmar, Mohamed Khalid, Alsaadi, Mohammed Abdulhakim, Hayyan, Maan, Akib, Shatirah, Ibrahim, Muhammad, Hashim, Mohd Ali
Format: Article
Language:English
Subjects:
Adsorption
Allyl Compounds - chemistry
Bromides - chemistry
Carbon nanotubes
Deep eutectic solvents
Functionalization
Ionic liquids
Kinetics
Mercury - chemistry
Mercury adsorption
Models, Theoretical
Nanotubes, Carbon - chemistry
Solvents - chemistry
Water Pollutants, Chemical - chemistry
Water Purification - methods
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Summary: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 Hg2+ 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 Hg2+. 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. [Display omitted] •Deep eutectic solvents were used as functionalization agents of CNTs.•The DES-CNT combination utilized as a novel Hg2+ adsorbent.•The DESs-CNTs adsorbent were characterized by various instrumental methods.•The effect of operation parameters is optimized utilizing RSM methodology.•Adsorption isotherm and kinetics were comprehensively investigated.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2016.09.133