期刊
MOLECULES
卷 26, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/molecules26092617
关键词
chromium; chitosan; green-zerovalent cupper; alginate; activated carbon; adsorption
资金
- King Khalid University [R.G.P.1/187/41]
- Deanship of Scientific Research at Princess Nourah bint Abdulrahman University through the Fast-track Research Funding Program
In this study, green nano-zerovalent copper, activated carbon, chitosan, and alginate nanocomposites were produced and utilized for the removal of chromium (VI) from contaminated solutions. Among the prepared nanocomposites, GnZVCu/AC-CS-alginate showed the highest adsorption efficiency for Cr+6, highlighting its potential for chromium segregation.
In the present investigation, green nano-zerovalent copper (GnZVCu), activated carbon (AC), chitosan (CS) and alginate (ALG) nanocomposites were produced and used for the elimination of chromium (VI) from a polluted solution. The nanocomposites GnZVCu/AC-CS-alginate and AC-CS-alginate were prepared. Analysis and characterization were performed by the following techniques: X-ray diffraction, energy dispersive X-ray spectroscopy, scanning electron microscopy, transmission electron microscopy and Fourier transform infrared spectroscopy. The SEM analysis revealed that the nanocomposites are extremely mesoporous, which leads to the greatest adsorption of Cr+6 (i.e., 97.5% and 95%) for GnZVCu/AC-CS-alginate and AC-CS-alginate, respectively. The adsorption efficiency was enhanced by coupling GnZVCu with AC-CS-alginate with a contact time of 40 min. The maximum elimination of Cr+6 with the two nanocomposites was achieved at pH 2. The isotherm model, Freundlich adsorption isotherm and kinetics model and P.S.O.R kinetic models were discovered to be better suited to describe the exclusion of Cr+6 by the nanocomposites. The results suggested that the synthesized nanocomposites are promising for the segregation of Cr+6 from polluted solutions, specially the GnZVCu/AC-CS-alginate nanocomposite.
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