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Metal ion extraction with a thiol hydrophilic resin. [N,N'-methylenebis(acrylamide) cross-linked poly(N-((acryloylamino)methyl)-mercaptoacetamide) resin]

Journal Article · · Anal. Chem.; (United States)
DOI:https://doi.org/10.1021/ac00235a007· OSTI ID:6122923
The application of 30% N,N'-methylenebis(acrylamide) cross-linked poly(N-((acryloylamino)methyl)mercaptoacetamide) resin for the concentration of metal ions from aqueous solutions has been investigated. A flow injection analysis method using a color forming reagent was developed, allowing fast cation assays. The pH dependence of the metal extraction for Na, Ca, Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Ag(I), Cd(II), Hg(II), Pb(II), and UO/sub 2//sup 2 +/ was studied. Heavy metals and Cu(II) exhibit a high affinity toward the thiol functions of the resin (half extraction pH <2), with fast fixation kinetics due to the hydrophilic matrix. The maximum resin capacity depends on the metal ion, due to the formation of ML/sub 2/ or/and MLL' complexes involving thiol functions and anion ligands. The resin selectivity determined at pH 5.5 is, in increasing order, Zn(II), Cd(II), Pb(II), Cu(II), and Hg(II).
Research Organization:
Universite Paris-Val de Marne, Creteil, France
OSTI ID:
6122923
Journal Information:
Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 53:12; ISSN ANCHA
Country of Publication:
United States
Language:
English