Epichlorohydrine crosslinked chitosan cinnamaldehyde Schiff base: Synthesis, characterization, thermal studies and its application in adsorption of methyl green

Abstract

Epichlorohydrine crosslinked chitosan cinnamaldehyde Schiff base (Epy-Chit-cin) had been synthesized by the reaction of epichlorohydrine, chitosan and trans-cinnamaldehyde (weight ratio 1:1:1) and characterized by FT-IR, UV-Vis, TG-DTA, DSC and XRD. The efficiency of the prepared Epy-Chit-cin was studied for the methyl green (MG) dye removal from aqueous solutions. The effects of pH, adsorbent dosage and contact time on the adsorption process were evaluated. Results showed that the equilibrium of MG adsorption by Epy-Chit-cin was reached at 120 min contact time and the maximum adsorption capacity obtained 98.47 at the presence of 0.02 g of Epy-Chit-cin.

Novel Gd2O3/SrFe12O19@Schiff base chitosan (Gd/SrFe@SBCs) nanocomposite as a novel magnetic sorbent for the removal of Pb(II) and Cd(II) ions from aqueous solution

“…Adsorption process is very simple, cost-effective, highly efficient, flexible, and does not produce secondary pollution has attracted more attention. [27][28][29][30][31] In this technique, various traditional adsorbents such as montmorillonite, [32,33] silica, [34,35] active carbon, [36][37][38] magnetic nanoparticles, [39,40] and modified chitosan [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][27][28][29][30][31] have been probed and applied for removing heavy metal ions from wastewater. Modified chitosan due to the existence of active sorbent groups such as -NH 2 , -OH, -SO 3 H, and -COOH are often used to treat wastewater containing heavy metal ions.…”

“…Modified chitosan due to the existence of active sorbent groups such as -NH 2 , -OH, -SO 3 H, and -COOH are often used to treat wastewater containing heavy metal ions. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][27][28][29][30][31] Liu et al applied N-methylene phosphonic chitosan aerogels to remove Cu(II) and Pb(II). At optimum conditions, the maximum adsorption capacities of Cu(II) and Pb(II) ions are about 276 and 645 mg/g, respectively.…”