Investigation on preparation of carboxymethyl chitosan modified sodium ferric silicate and its adsorption properties

Abstract

The layered material of sodium ferric silicate (SFS) has good adsorption properties for cationic dyes, but its stacking properties limit its application. The organic-inorganic composite assembled by macromolecular polymer and inorganic material can improve this situation. Carboxymethyl chitosan (CC) was loaded onto SFS, and the compound was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscope (TEM), Brunauer-Emmett-Teller (BET), zero energy thermonuclear assembly (Zeta), and Fourier transform infrared spectroscopy (FT-IR). The results showed that CC was successfully supported in the layered structure of SFS, and the adsorption capacity of the composite for methylene blue (MB) was 729.67 mg g À1 . The adsorption process was described by pseudo second-order kinetics, Langmuir isothermal equation, and intraparticle diffusion. The adsorption process was endothermic and spontaneous, and the monomolecular adsorption was dominant.

A novelO‐carboxymethyl chitosan‐based hydrogel of an outstanding adsorption performance for removal of cationic Basic Red 12 dye from its aqueous solution

“…[18][19][20][21][22][23] Among these biopolymers is the O-carboxymethyl chitosan (O-CM-chitosan) which has fascinating chemical and physical properties that helped it to be one of the best adsorbents for dyes. 24 O-CM-chitosan is one of the most important chitosan derivatives. It can be prepared via reacting chitosan with monochloroacetic acid in an alkaline medium.…”

“…Among these biopolymers is the O ‐carboxymethyl chitosan ( O ‐CM‐chitosan) which has fascinating chemical and physical properties that helped it to be one of the best adsorbents for dyes 24 . O ‐CM‐chitosan is one of the most important chitosan derivatives.…”

Effect of storage time on the antimicrobial properties of chitosan

“…[1] CS finds applications in many fields namely, pharmacy, food industry, medicine, biotechnology, and agriculture. [2,3] It is non-toxic, biocompatible, easily absorbable, antimicrobial, antitumoral, anti-diabetic, neuroprotective and anti-hypoglycemic which paves way for its potential use in medical and pharmaceutical applications. [4][5][6] CS, being a natural polymer is especially regarded to be one of the best used drug carrier and drug delivery agent owing to its safety and non-toxicity.…”

Mercaptolated chitosan/methacrylate gelatin composite hydrogel for potential wound healing applications

“…Chitosan could be chemically modified using its inherent reactive activity due to the presence of hydroxy-or amino functional groups. Major reactions in this regard are acylation, carboxymethylation, quaternization, sulfation, N-phosphomethylation etc [5][6][7][8][9]. Indeed, chitosan has also been crosslinked with glutaraldehyde or glycerophosphate or composited with other polymers, including alginate and gelatin [10,11].…”