A systematic method of synthesizing composite superabsorbent hydrogels from crosslink copolymer for removal of textile dyes from water

Fast dye removal from water by starch-based nanocomposites

“…Above such concentration the adsorption profile showed slight increment until constant values, for both systems. Such results are consistent with other previously reported in the literature for similar systems [43,51]. According to some authors, high initial concentrations of MB can generate a concentration gradient, which affects the diffusional process of MB molecules into the hydrogel matrix [43,44].…”

“…The correlation coefficient (R 2 ) values calculated for that last kinetic model were higher than 0.999; strong evidence that MB adsorption process in the adsorbent samples followed a pseudo-second-order kinetics. This model assures that the MB adsorption process was driven by chemisorption phenomenon, which results from valence forces through the sharing or exchange of electrons between the adsorbent and the adsorbed specimen [43,51]. Additionally, according to this model the adsorption rate of the hydrogels nanocomposite is given in the order of the amount of CNWs incorporated 5 > 10 > 15 > 20 > 0 (wt.%).…”

Tragacanth gum /nano silver hydrogel on cotton fabric: In-situ synthesis and antibacterial properties

“…Removing dyes, metal ions and other impurities from wastewater is one of the applications of hydrogel in textile industry (Bhattacharyya et al, 2013;Lučić et al, 2014;Li et al, 2013;Atta et al, 2012). Furthermore, they can be used for boosting fabric characteristics.…”

Swelling, diffusion, network parameters and adsorption properties of IPN hydrogel of chitosan and acrylic copolymer

“…Synthetic monomers such acrylamide, acrylic acid and hydroxyethyl methacrylate based homo and copolymer hydrogels have been extensively used as adsorbents for dyes [5,6,7]. The objective of the present work was to combine the advantages of a natural and a synthetic polymer by making their stable IPN blend.…”

“…Chitosan was considered since hydrogels based on chitosan have been widely used for the removal of low concentration dyes from water [1,3]. For solution polymerization in water at least 10-15 wt.% concentration of synthetic monomers in water is required [5] while it is difficult to make concentrated chitosan solution in water (in the presence of acetic acid) because of its high viscosity. Thus, polymerizing synthetic comonomers in the matrix of chitosan by solution polymerization is difficult.…”