Swelling and dye adsorption study of novel superswelling [Acrylamide/N-vinylpyrrolidone/3(2-hydroxyethyl carbamoyl) acrylic acid] hydrogels

Dye adsorption characteristics of alginate/polyaspartate hydrogels

“…As reported elsewhere, various polymeric sorbents with different properties adsorbed different dyes from aqueous solutions within the range of 1-5 days [22][23][24]. In addition, the adsorption capacity of Alg/PASP hydrogels for MB were quite high compared with those obtained in previous studies [25,26]. Both the higher adsorption rates and capacity of the Alg/PASP composite hydrogels rapidly reaching equilibrium in short times might have advantages in dye adsorption and the removal process.…”

Application of Superabsorbent Polymers for Improving the Ecological Chemistry of Degraded or Polluted Lands

“…The dependence of WRC on concentration of a solute is predicted to be described by an efunction [44]. The diffusion of water within the hydrogel was found to have non Fickian character [28]. In chemically cross-linked hydrogels the water transport is Fickian in nature, while in the case of physically cross-linked hydrogels, the water transport mechanism is anomalous indicating a major change in the relaxation mechanism due to the nature of the cross-links [29].…”

“…For the design of this special type of soil conditioner, a variety of different polymers have been developed and tested, which included guar [16], starch, polyacrylate and poly(ethylene glycol) [17], alginate-poly(sodium acrylate-coacrylamide) [18], alginate-g-poly(sodium acrylate)/kaolin [19], carboxymethylchitosan-g-poly(acrylic acid) copolymer [20], acrylic acid and maleic anhydride-copolymerizate [21], polyvinylalcohol-phosphate [22], acrylic acid-polyvinyl alcohol copolymer [23], polyacrylamide [24 -27], acrylamide/Nvinylpyrrolidone/3(2-hydroxyethyl carbamoyl) acrylic acid [28], poly(acrylamide-co-methyl methacrylate) [29], polyacrylamide/sodium alginate [30], polyacrylic acid [31], sodium polyacrylate, prepared by solution polymerization with N,N-methylene-bisacrylamide (bisAM) as a cross-linking agent, surface cross-linked by ethylene glycol diglycidyl ether (EGDE) [32], poly(sodium acrylate) cross-linked with modified poly(ethylene glycol) [33], sulfonated polystyrene [34], hydrolysed acrylonitrile sulfonated polystyrene [35], poly(ethylene oxide) [36], n-vinyl-2-pyrrolidone and partially neutralized acrylic acid [37], poly(tartaramide)s, poly(ester-amide)s containing oxyethylene segments [38], poly(aspartic acid) and its derivatives [39,40] poly(acrylic acid)/attapulgite/sodium humate [41].…”

Novel Cationic Poly[AAm/NVP/DAPB] Hydrogels for Removal of Some Textile Anionic Dyes from Aqueous Solution

“…The cationic poly [AAm/NVP/DAPB] hydrogels (YH 1 -YH 5 ) were synthesized by free radical polymerization by adopting a described technique in our previous paper (14). The polymerization and simultaneous crosslinking was accomplished in a 100 mL flask equipped with a magnetic bar containing monomers, crosslinker (N,N-methylene bisacrylamide), initiator (2.2 -azobis (2-methylpropionamidine) dihydrochloride) and water.…”

“…Among these methods, the most efficient method for the removal of synthetic dyes from aqueous effluents is adsorption (10). In recent years, many researchers along with our research group have worked on removal of dyes using different hydrogels having different functional groups (11)(12)(13)(14). Perhaps polymeric sorbents with quaternary ammonium groups are the most efficient materials in binding of the dyes having sulfonic acid groups (15).…”