CoFe2O4/CHITOSAN MAGNETIC NANOCOMPOSITE: SYNTHESIS, CHARACTERIZATION AND APPLICATION FOR ADSORPTION OF ACIDIC YELLOW DYE FROM AQUEOUS SOLUTIONS

Abstract

Magnetic chitosan-modified CoFe 2 O 4 nanoparticles, CS/CoFe 2 O 4 , were successfully synthesized by an in situ coprecipitation technique. The structure, crystal phase, surface morphology and magnetic properties of CS/CoFe 2 O 4 were characterized by FTIR, TGA, XRD, FE-SEM, EDX and VSM analyses. The as-prepared CS/CoFe 2 O 4 nanoparticles were employed to adsorb Acid Yellow 17 dye (AY17) from aqueous solutions. The influence of experimental parameters, such as pH, temperature, contact time, adsorbent dosage and initial dye concentration on the efficiency of AY17 adsorption was studied. The maximum dye removal percentage reached 90% after 90 min adsorption at pH 4.0 and 323 K for the solution with an initial AY17 concentration of 30 mg L-1 and CS/CoFe 2 O 4 dose of 0.01 g. The adsorption kinetics agreed well with the pseudo-second order model. The isothermal data preferably followed the Langmuir model, with the maximum adsorption capacity of 89.10 mg g-1. Thermodynamic studies illustrated that the adsorption process is endothermic and spontaneous.

Adsorption of Remazol Brilliant Violet Onto Chitosan 10b in Aqueous Solution: Kinetics, Equilibrium and Thermodynamics Studies

“…In recent years, biomass has been accepted as an appropriate low-cost adsorbent for the removal of dyes from aqueous solution. Many types of natural and modified biomass, such as biochars, 13 mango leaves, 14 Daucus carota, 15 Irvingia gabonenses, 16 agricultural by-products, 17 chitin, 18 chitosan [19][20][21][22][23] and functionalized chitosan, [24][25][26] have shown promising results in dye adsorption applications. However, related reports on utilizing chitosan to remove Remazol Brilliant Violet (RBV; Fig.…”

Mesoporous chitosan/activated charcoal powder and bead modified in 1‐butyl‐3‐methylimidazolium acetate for the adsorption of acid blue 25 from an aqueous solution

“…The absorption signals at 1660, 1429, 1379 and 1159 cm −1 were assigned to the stretching vibrations of the carbonyl of the amide bond, CH 2 bend, COH bend and CO asymmetric stretching of chitosan polymeric linkage, respectively. The absorption signal at 1068 and 888 cm −1 was allocated to CO stretching and CH bending (out of plane), respectively 16,43 . Furthermore, the absorption signals on the activated carbon at 3416, 1548 and 1085 cm −1 were assigned to OH overlap with NH stretch, C═C stretch and CO stretch vibrations, respectively.…”

Fabrication of a pH-responsive magnetic nanocarrier based on carboxymethyl cellulose-aminated graphene oxide for loading and in-vitro release of curcumin

“…With the formation of the CoFe2O4/GO, some changes were observed in the intensity or positions of peaks in the spectrum. For example, the peak at 3437 cm −1 became weak and shifted to 3411 cm −1 and a new absorption band appeared at 607 cm −1 due to the asymmetric bending mode (Fe-O) of the CoFe2O4 [32]. When the GO was functionalized with ADH, two characteristic peaks of 3200 and 1620 cm −1 related to the N-H stretching vibration and amide bond were detected.…”