Chitosan hydrogel beads impregnated with hexadecylamine for improved reactive blue 4 adsorption

The Optimum Conditions of Carboxymethyl Chitosan Synthesis on Drug Delivery Application and Its Release of Kinetics Study

“…Chitosan (CS) or β-(1,4) -D-glucosamine is cationic polysaccharide main derivative of chitin which is from the shells of crustaceans, so it is available very abundant in nature [8][9][10][11][12][13]. Chitosan insoluble in neutral and alkaline pH because of the amino groups of chitosan are weak bases which predominantly protonated when pH<6.…”

Enhancing reactive blue 4 adsorption through chemical modification of chitosan with hexadecylamine and 3-aminopropyl triethoxysilane

“…Preparation of the modified chitosan beads was performed following the conditions as reported by Vakili et al [10] and Vakili et al [11]. Briefly, 3.04 mM of HDA was first added into the CS solution (2 wt.% CS and 1 v/v% acetic acid).…”

“…Therefore, increasing the amount of functional groups (mainly amino groups) through chemical modification using different types of modification agents will create new chitosan derivatives with improved adsorption properties. In previous research performed the effect of hexadecylamine (HDA) [10] and 3-aminopropyl triethoxysilane (APTES) [11] on chemical modification of chitosan for reactive blue 4 (RB4) removal has been reported. Nevertheless, the effect of simultanious modification of these chemicals has not been reported so far.…”

Effective removal of a cobalt‐tetrasulfonated phthalocyanine dye from an aqueous solution with a novel modified chitosan‐based superabsorbent hydrogel

“…Chitosan has been widely investigated as a biosorbent for the capture of pollutants, including metals, dyes, phenols, ammonium nitrogen, nitrate, fluoride, and phthalates, from wastewater. In particular, hydrogels obtained from chitosan have spurred great interest in the adsorption of dyes from aqueous solutions because of their internal porous structure, ecofriendliness, cost‐effectiveness, and high specific surface area . Interestingly, the amine groups give the chitosan cationic characteristics, and the protonation of chitosan in acidic media leads to the adsorption of metal anions by ion exchange .…”