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Facile fabrication of thiol-modified cellulose sponges for adsorption of Hg2+ from aqueous solutions
- Source :
- Cellulose. 25:3025-3035
- Publication Year :
- 2018
- Publisher :
- Springer Science and Business Media LLC, 2018.
-
Abstract
- Thiol-functionalised cellulose sponges were conveniently synthesised by reacting (2,2,6,6-tetramethylpiperidin-1-yl)oxyl oxidised cellulose nanofibrils (CNF) with (3-mercaptopropyl)-trimethoxysilane (MPTMS) at room temperature. The sponges, whose structures resemble honeycombs, were systematically characterised using Fourier transform infrared spectroscopy, solid-state 13C nuclear magnetic resonance spectroscopy, elemental analysis, scanning electron microscopy, energy-dispersive X-ray spectroscopy and compression tests. It was shown that the sponges could be used to selectively remove Hg2+ from an aqueous solution containing other metal ions and had excellent adsorption capacities of up to 700 mg/g. The sorption isotherm followed the typical Langmuir model and the adsorption kinetics fit a pseudo-second-order model. X-ray photoelectron spectroscopy was applied to confirm that sulfur and oxygen had significant roles in the adsorption of Hg2+. The sponges also showed high reusability after three adsorption–desorption cycles. This paper provides a simple method to prepare highly efficient adsorbents for the adsorption of Hg2+ from aqueous solutions.
- Subjects :
- Aqueous solution
Polymers and Plastics
Chemistry
Metal ions in aqueous solution
Langmuir adsorption model
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
chemistry.chemical_compound
symbols.namesake
Adsorption
X-ray photoelectron spectroscopy
Chemical engineering
symbols
Cellulose
Fourier transform infrared spectroscopy
0210 nano-technology
Spectroscopy
Subjects
Details
- ISSN :
- 1572882X and 09690239
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- Cellulose
- Accession number :
- edsair.doi...........b0cc29b42c60e9309018c95b447d89a0