Magnetic ZnFe₂O₄@chitosan encapsulated in graphene oxide for adsorptive removal of organic dye

Abstract

Graphene-based multifunctional composites were prepared by encapsulating of magnetic ZnFe 2 O 4 @chitosan (ZnFe 2 O 4 @CS) particles into graphene oxide (GO) layers. The obtained ZnFe 2 O 4 @CS/ GO were characterized using scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Adsorption of basic fuchsin (BF) onto the ZnFe 2 O 4 @CS/GO was investigated using pH, adsorption time, initial BF concentration and temperature.Kinetic data and adsorption isotherms were better fitted by a pseudo-second-order kinetic model and

Eco-Friendly Synthesis and Characterization of Double-Crossed Link 3D Graphene Oxide Functionalized With Chitosan for Adsorption of Sulfamethazine From Aqueous Solution: Experimental and DFT Calculations

“…Meanwhile, when the pH increases the composite exhibits negative charge because of generation of -COO − and NH2 groups leading to more electrostatic interactions, and the cations will be eliminated from the solution phase. As pH further increases, it leads to increase in the ionic strength in the solution and thus reduces the adsorption efficiency (Wu et al, 2017).…”

Preparation of cationic polymeric nanoparticles as an effective adsorbent for removing diclofenac sodium from water

“…So far, a variety of methods such as adsorption, [3][4][5][6][7] biodegradation, 8 oxidation, 9 and membrane ltration 10 have been employed to remove different organic micropollutants from wastewater. Amongst these techniques, adsorption using solid adsorbents is an effective method for the removal of organic micropollutants from water.…”

“…Nanoparticles are used as adsorbents because of their small particle sizes, large specic surface areas and high density of surface active sites, good hydrodynamic performances. 17,18 These nanomaterials such as Fe 3 O 4 nanoparticles, 19 SiO 2 -coated Fe 3 O 4 nanocomposites, 20,21 and carbon nanotubes 22 have been used for the removal of organic pollutants and DS in water. However, these nanoparticles adsorbents have some shortcomings, such as high preparation cost, strict operational condition, and high energy consumption.…”

High Uptake of the Carcinogenic Pararosaniline Hydrochloride Dye from Water Using Carbazole-Containing Conjugated Copolymers Synthesized from a One-Pot Cyclopentannulation Reaction

“…This greatly supports that the Langmuir isotherm model is more satisfactory than Freundlich to illustrate the equilibrium data and which, thus, proposes a homogeneous adsorption and the monolayer formation of BR9 at the surface of CAP3 . Furthermore, the determination of the maximum uptake capacity ( q m ) of 483.09 mg g –1 , and which is derived from the Langmuir model for CAP3 , is larger than the uptake capacities reported for several adsorbents in the literature. ,− It is noteworthy that copolymers CAP1,2 also follow the Langmuir isotherm model with maximum adsorption capacities ( q m ) of 354.61 and 375.94 mg g –1 respectively (Figures S25,S26 in Supporting Information).…”