Metal Ion Uptake Properties of Acrylamide Derivative Resins

Abstract

Completely water insoluble resins containing different ligand groups were synthesized by radical polymerization in solution. The yield was higher than 78%. The resins were characterized by FT‐IR spectroscopy and thermal analysis. The retention properties at different pH were investigated by a batch method. Metal ions studied were: Cu(II), Cd(II), Zn(II), Hg(II), Pb(II), Cr(III), and U(VI). The retention properties were also tested under competitive conditions and were found to depend strongly on the pH. Elution of the metal ions was investigated in acid and basic media.

Preparation of organically functionalized silica gel as adsorbent for copper ion adsorption

“…The dependence of Cu 2+ uptake on pH is related to the surface functional groups of the adsorbent. At low pH (e.g., pH 2), the -NH and -SO 3 -groups in AMPS are protonated where metal ion must compete with the proton (Rivas et al, 2001). At high pH, -OH, -NH and -SO 3 H are ionized, therefore, the formation of specific interaction with metal ions is more pronounced.…”

The enhanced removal of cationic dyes in binary system using novel copolymers with two kinds of acidic groups

“…Low removal efficiency at lower pHs was expected due to competition between dye molecules and H + ions, protonation of carboxylic and sulfonic groups and formation of COOH and SO 3 H groups capable to interact with dye molecules only through hydrogen bonds. At higher pHs COOH and SO 3 H groups in hydrogels dissociated to form COO − and SO 3 − enabling formation of more pronounced electrostatic interactions with dye molecules [34]. At pH4, 6 and 8, sorption efficiency toward BY28 and BR46 increased with the increase in AMPS content up to 50%, while further increase in AMPS ratio in copolymer hydrogels caused the decrease in sorption due to interactions between alkyl groups of AMPS units and formation of agglomerates [26].…”

Degraded Pet for the Removal of Metal Ions From Aqueous Solution

“…The results show lower removal concentrations for Ni(II), Cu(II), and Cr(III), since these ions are easily complexed with hydroxyl ions(OH -) this species decrease their retention onto degraded PET. Additionally, charge and size of each formed species play an important role due to the competence for heteroatoms between all the metal species in solution 2,5 . Degraded PET preferentially removes Pb(II) and Cd(II) showing the following order of retention at pH 4 and 5: Pb(II)>Cd(II)>Ni(II)>Cu(II)>Cr(I II), these results coincide with other reports, attributing this order to factors like complexation abilities, which can be explained by hard and soft acids and bases (pH 5, 25°C).…”

“…Toxic metals as lead, chromium, copper, nickel, cadmium, and zinc are released into the water mainly through industrial activities 1 . Different materials such as homopolymers and modified polymers 2 including polypropylene 3 , polyacrylic acid 4 , polyacrylamide 5 , polyurethane 6 , polyethylene terephthalate 7,8 among others, have been studied to reduce the amount of heavy metals in aqueous solution.…”