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

Abstract

Novel cationic poly [AAm/NVP/DAPB] hydrogels (YH 1 -YH 5 ) were synthesized by free radical solution polymerization of AAm, NVP and DAPB by increasing the concentration of DAPB in the feed. According to swelling experiments, hydrogel YH 5 with higher DAPB content gave relative higher swelling percentage compared to other hydrogels. The hydrogel YH 5 was characterized by FTIR, TGA and SEM analysis. The anionic dye solution such as Orange-II, Reactive Golden Yellow and Acid Yellow were used as an adsorption medium to investigate the usability of the hydrogel for the removal of anionic dyes. The effect of pH of the adsorption medium, initial concentration of the dye, adsorbent dose, %swelling and contact time was also investigated. Furthermore, the Langmuir and Freundlich adsorption isotherms were applied and they showed a good fit to the experimental data. From the results, the uptake of dyes within the hydrogel increased in the following order: Reactive Golden Yellow>Orange-II>Acid Yellow.

Optimization of parameters for adsorption of acid yellow 36 dye onto nitrate‐intercalated MgAl LDH nanoparticle using Box–Behnken design

“…Further, it was found that 62.51, 78.32 and 95.95% of AY were adsorbed onto 5, 7, and 10 mg of adsorbent, respectively, in 50 mL of 0.03 mg mL −1 AY solution. This was due to the increase in active sites for adsorption with increasing adsorbent doses 32‐34 . Conversely, when the adsorbent concentration was increased from 10 to 30 mg, the adsorption percentage of AY remained almost unchanged as it reached the saturation stage of adsorption of AY.…”

“…The initial pH values of the AY solution and LDH suspension play a major role in the adsorption process. 34,35 It can be seen in Fig. 8 that the adsorption percentage of AY onto LDH at 25 °C was decreased with increasing pH of the overall suspension from 5 to 9, and the maximum adsorption percentage of AY was achieved at pH 5.…”

“…This was due to the increase in active sites for adsorption with increasing adsorbent doses. [32][33][34] Conversely, when the adsorbent concentration was increased from 10 to 30 mg, the adsorption percentage of AY remained almost unchanged as it reached the saturation stage of adsorption of AY. Thus, the adsorption capacity was decreased with increasing adsorbent dose concentration, as in Fig.…”

Removal of heavy metal ions from aqueous solution by superabsorbent poly (NIPAAm/DAPB/AA) amphoteric nanohydrogel

“…DAPB cationic monomer was synthesized in our laboratory and characterized by previously reported method [18]. N-isopropylacrylamide (NIPAAm) (Aldrich, 97%) was used as received and need not to be purified further.…”

A novel approach for the synthesis of hydrogel nanoparticles and a removal study of reactive dyes from industrial effluent

“…According to the previously reported synthesis of quaternary amine monomers, [28][29][30][31] the DACPB monomer was synthesized from isonipecotic acid in four steps. The complete reaction scheme is given in Scheme 1.…”