Carbohydrate and collagen-based doubly-grafted interpenetrating terpolymer hydrogel via N–H activated in situ allocation of monomer for superadsorption of Pb(II), Hg(II), dyes, vitamin-C, and p-nitrophenol

Synthesis of a novel arginine-modified starch resin and its adsorption of dye wastewater

“…The adsorption isotherms were measured using different initial concentrations of dye. 40,54 The results in Fig. 14 and Table 3 show that in the entire concentration range, the Langmuir model best tted the equilibrium adsorption data for the AF and AOG dyes.…”

“…8(e-h)), the N 1s signal was deconvoluted into two peaks, which are assigned to the imine -N]C-(399.35 eV) and primary amine -NH 2 (399.63 eV). 40 The shi in the binding energies for C 1s and N 1s caused by the chemical environment was evidence for the introduction of the PAM graing chains and the Arg residues. Aer the dye adsorption, the N 1s peak shied to 399.71 eV (AF), 399.92 eV (AOG), and 400.11 eV (AB80), which are attributed to the -N]N-, Ph-NH-Ph, and NH]Ph from the dye molecules, where the p-p and p-p conjugative effects among the amino, imino and benzene groups increased the electron binding energy of the N atoms, respectively.…”

“…The temperature for the rst stage of thermal decomposition for StAM-Arg was higher because of the formation of three-dimensional network macro- At 270-315.6 C, the thermal stability of dye-loaded StAM-Arg was even higher than that of StAM-Arg, which was attributed to the fact that during the adsorption process, dye molecules were stuck on the resin backbone, forming a heatresistant cross-linking admixture. 40 However, at 315.6-580 C, the decomposition of -SO 3 À and -OH would break the association between the dye and StAM-Arg, leading to the separation of the dye molecules from the resin, which made the dye more prone to thermal degradation. Moreover, it is worth noting that the curves of StAM-Arg and dye-loaded StAM-Arg formed two intersections at 315.6 C and 580 C. Above 315 C, the mass loss of StAM-Arg was higher than that of dye-StAM-Arg, which may be due to the accelerated decomposition of the Arg residues.…”

Adsorption Processing for the Removal of Toxic Hg(II) from Liquid Effluents: Advances in the 2019 Year

“…Experimental data showed that the adsorption capacity was of 1.09 mmol/g. Again, desorption data were not given in the manuscript Guar gum (GG)-g-(acrylic acid (AA)-co-3-acrylamido propanoic acid (AMPA)-co-acrylamide (AM))-g-cow buffing dust (CBD)/(GGTPCBD), a smart carbohydrate and protein-based doubly-grafted interpenetrating terpolymer hydrogel, was synthesized and used in the adsorption, among others inorganic and organic pollutants, of Hg(II) [77]. The adsorption was related to the pseudo-second order model and the Langmuir isotherm in a thermodynamically spontaneous chemisorption process.…”

A POSS‐Phosphazene Based Porous Material for Adsorption of Metal Ions from Water

“…In the past, extensive studies have been reported to unravel the scopeo fs uch functional materials as activated porous carbon, [5] zeolites, [6] silica particles, [7][8][9][10][11][12][13] graphene oxide, [14,15] metals or metal oxides, [16,17] natural minerals [18][19][20] etc. as adsorbents for remediationo fm etal ions from water.T he search for new and efficient adsorbentsh as prompted the design and synthesis of functional polymers, [21][22][23][24][25][26][27] metal organic frameworks, [28][29][30] polymeric composites [31][32][33] and biohybrids. [34] Nev-ertheless, the problem of low adsorption capacity of these materials stillr emains ac hallenge due to lack of synthetic methods which favor modulations in the physicalp roperties and surfacec hemistry.I tm eanst hat except high surface area the designeda dsorbent should possess functional electron-rich groups on thes urface, whichw ill have strongi nteractionw ith metal ions.…”