Retention of chromate ion by conventional and N-ethylpyridinium strongly basic anion exchange resins

Sorption of Cr(VI) ions on two Lewatit-anion exchange resins and their quantitative determination using UV–visible spectrophotometer

“…Styrene polymers are one of the most popular precursor copolymers for obtaining ion exchangers with different functionalities and morphologies. Functional crosslinked polymers, bearing primary amine groups are of great interest because of their high reactivity [9][10][11][12][13][14][15].…”

Removal of hexavalent chromium by new quaternized crosslinked poly(4-vinylpyridines)

“…The previous work focused on the thermodynamic and kinetic studies of Cr(VI) removal from aqueous solutions by the pyridine resins with different lengths of alkyl substituent namely, methyl, ethyl, butyl or amide functional groups at the quaternary nitrogen atom [43][44][45][46]. Chromium retention capacity depends on the ionic form of the strong base anion exchangers and the substituent type at the quaternary ammonium atoms.…”

Removal of Cr(VI) onto functionalized pyridine copolymer with amide groups

“…Removal of Cr(VI) from cooling water and ground water by ion exchanger has been investigated by many researchers and their results have been published [9][10][11][12][13][14][15][16][17][18][19][20][21][22]. The main advantages of the ion exchange are recovery of the metal, selectivity, less sludge volume produced and the meeting of strict discharge specification.…”

“…Previous work focused on the thermodynamic and kinetic studies of Cr(VI) retention from the aqueous solutions on the pyridine resins with different lengths of alkyl substituents namely, methyl, ethyl and butyl functional groups at the quaternary nitrogen atom [20][21][22]. Chromium retention capacity depends on the ionic form of the strong base anion exchangers and the substituent type at the quaternary ammonium atoms.…”