Novel deep eutectic solvent-functionalized carbon nanotubes adsorbent for mercury removal from water

Mohamed Khalid Alomar, Mohammed Abdulhakim Alsaadi, Taha M. Jassam, Shatirah Mohamed Akib, Mohd Ali Hashim, Carsten Schwandt

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Abstract

Due to the interestingly tolerated physicochemical properties of deep eutectic solvents (DESs), they are currently in the process of becoming widely used in many fields of science. Herein, we present a novel Hg2+ adsorbent that is based on carbon nanotubes (CNTs) functionalized by DESs. A DES formed from tetra-n-butyl ammonium bromide (TBAB) and glycerol (Gly) was used as a functionalization agent for CNTs. This novel adsorbent was characterized using Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, XRD, FESEM, EDX, BET surface area, and Zeta potential. Later, Hg2+ adsorption conditions were optimized using response surface methodology (RSM). A pseudo-second order model accurately described the adsorption of Hg2+. The Langmuir and Freundlich isotherm models described the absorption of Hg2+ on the novel adsorbent with acceptable accuracy. The maximum adsorption capacity was found to be 177.76 mg/g.
Original languageEnglish
Pages (from-to)413–421
Number of pages9
JournalJournal of Colloid and Interface Science
Volume497
Early online date6 Mar 2017
DOIs
Publication statusPublished - 1 Jul 2017

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    Alomar, M. K., Alsaadi, M. A., Jassam, T. M., Mohamed Akib, S., Hashim, M. A., & Schwandt, C. (2017). Novel deep eutectic solvent-functionalized carbon nanotubes adsorbent for mercury removal from water. Journal of Colloid and Interface Science, 497, 413–421. https://doi.org/10.1016/j.jcis.2017.03.014