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Salicylaldehyde derivative of nano-chitosan as an efficient adsorbent for lead(II), copper(II), and cadmium(II) ions
- Source :
- International Journal of Biological Macromolecules. 147:643-652
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- In this study, a biodegradable natural polymer chitosan was modified with salicylaldehyde to prepare salicylaldehyde functionalized chitosan nanoparticles (N-Ch-Sal). The N-Ch-Sal was characterized by atomic force microscopy (AFM), scanning electron microscopy-energy-dispersive X-ray (SEM-EDX), Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA). The salicylaldehyde functionalized chitosan nanoparticles (N-Ch-Sal) (~80 nm) were then used for the adsorption of three heavy metals viz., Cu(II), Cd(II) and Pb(II) ions. The above-mentioned techniques were also employed for evaluation of changes in N-Ch-Sal after metal adsorption. The parameters affecting the adsorption of metal ions including pH, contact time, amount of adsorbent, initial metal ion concentration and the effect of interfering ions, were studied thoroughly and optimized. The concentration of metal ions remaining in the aqueous system after adsorption experiments was analyzed by ICP-MS. At optimal conditions, sorption capacity of Pb(II) ion was found to be highest i.e., 123.67 followed by Cu(II) (84.60) and Cd(II) (63.71 mg/g). The adsorption process followed the pseudo-second-order kinetic model and fitted well with the Langmuir adsorption isotherm. The adsorption method was applied to a real tap water sample for the quantification and removal of Pb(II) ions. The concentration of Pb(II) ions in the tested sample was 4.88 ppb.
- Subjects :
- Thermogravimetric analysis
Metal ions in aqueous solution
02 engineering and technology
Biochemistry
03 medical and health sciences
symbols.namesake
chemistry.chemical_compound
Adsorption
Structural Biology
Metals, Heavy
Humans
Fourier transform infrared spectroscopy
Molecular Biology
030304 developmental biology
Ions
Aldehydes
Chitosan
0303 health sciences
Aqueous solution
Chemistry
Water
Langmuir adsorption model
Sorption
General Medicine
021001 nanoscience & nanotechnology
Lead
Salicylaldehyde
symbols
Nanoparticles
0210 nano-technology
Copper
Water Pollutants, Chemical
Cadmium
Nuclear chemistry
Subjects
Details
- ISSN :
- 01418130
- Volume :
- 147
- Database :
- OpenAIRE
- Journal :
- International Journal of Biological Macromolecules
- Accession number :
- edsair.doi.dedup.....b9f08c011c41da28ea5c4100c0e99bbc