Study of ionic charge dependent salt resistant swelling behavior and removal of colloidal particles using reduced gum rosin-poly(acrylamide)-based green flocculant

Abstract

analyzed through the Smoluchowski classical model based on first-order and second-order kinetics.

Synthesis of semi interpenetrating network hydrogel [(GrA‐Psy)‐cl‐Poly (AA)] and its application for efficient removal of malachite green from aqueous solution

“…Poly (AA) chains get grafted onto active sites of backbone leading to the formation of graft copolymer. Different poly (AA) chains undergo cross‐linking with MBA, thereby resulting in the formation of cross‐linked adsorbent (GrA‐Psy)‐cl‐poly (AA) . The synthesis of semi‐IPN is schematically represented in Scheme .…”

“…To study the swelling capacity of (GrA‐Psy)‐cl‐poly (AA) hydrogel, dried hydrogel with its pre‐weighed amount was immersed in 100 mL of deionized water at 308 K temperature. Weight of swollen sample was taken at regular time intervals and percentage swelling (% P s ) was calculated using following equation : where W s and W d are the weights of the swollen and dry samples, respectively.…”

“…The hydrogel obtained was dried in hot air oven at 323 K until a constant weight was obtained. Various reaction parameters were optimized as a function of percentage swelling such as amount of solvent, polymerization time, temperature, initiator concentration, monomer concentration, cross‐linker concentration, and pH .…”

“…However, the grafted polymer showed somewhat rough surface morphology due to the incorporation of poly (AA) chains onto psyllium and reduced backbone through covalent bonding. Thus, FE-SEM results clearly indicated the changes brought about by grafting of poly (AA) onto the backbones [20,39].…”

“…Hydrogels are the three-dimensional polymeric network, which can imbibe large amount of solvent without itself getting soluble. Because of this, they are being used as water purification agents [15][16][17][18][19][20][21]. Hydrogels show selective adsorption of dissolved substances such as ionic dyes, due to ionic functional groups present on the polymer groups [22][23][24][25][26][27].…”