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

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:497

Article

AlOmar, Mohamed Khalid^1,2  Alsaadi, Mohammed Abdulhakim^2,3,4  Jassam, Taha M.⁵  Akib, Shatirah⁶  Hashim, Mohd Ali^2,7 

[1] Univ Malaya, Dept Civil Engn, Kuala Lumpur 50603, Malaysia

[2] Univ Malaya, Ctr Ion Liquids, Kuala Lumpur 50603, Malaysia

[3] Univ Malaya, NANOCAT, Nanotechnol & Catalysis Res Ctr, IPS Bldg, Kuala Lumpur 50603, Malaysia

[4] Univ Nizwa, Natl Chair Mat Sci & Met, Nizwa, Oman

[5] UCSI Univ, Fac Engn Technol & Built Environm, Civil Engn Dept, Kuala Lumpur 56000, Malaysia

[6] Heriot Watt Univ Malaysia, EGIS, Sch Energy Geosci Infrastruct & Soc, Putrajaya 62200, Malaysia

[7] Univ Malaya, Dept Chem Engn, Kuala Lumpur 50603, Malaysia

关键词: Deep eutectic solvents;    Carbon nanotubes;    Functionalization;    Mercury;    Adsorption;   

DOI  :  10.1016/j.jcis.2017.03.014

来源: Elsevier

【 摘 要 】

Due to the interestingly tolerated physicochemical properties of deep eutectic solvents (DES5), 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. (C) 2017 Elsevier Inc. All rights

【 授权许可】

Free