Preferred uptake of Cu(II) and Cd(II) by novel pyrazole-functionalized chelating polymers

D. A. Roozemond, F. den Hond, J. B.J. Veldhuis, H. Strasdeit, W. L. Driessen*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

50 Citations (Scopus)

Abstract

The synthesis and characterization of two novel pyrazole-functionalized chelating polymers are reported. Functionalization of p-aminomethyl substituted poly(styrene-co-divinylbenzene) was effected by treatment with 3,5-dimethyl-1-hydroxymethylpyrazole (product: LDp) and 1-hydroxymethylpyrazole (product: LPz), respectively. For LDp a chelating group with one dimethylpyrazole per amine nitrogen resulted; in the case of LPz both amine hydrogen atoms were substituted by pyrazole groups. The capacities for Cu2+ and for Cd2+ and their distribution coefficients appeared to be substantially larger than those for Ca2+, Co2+, Ni2+ and Zn2+ for both chelating polymers in the pH range 3.5-5.5. These results were confirmed by competitive experiments between pairs of metal ions. Regeneration (stripping) of Cu2+-loaded LPz with strong mineral acids resulted in the decomposition of the chelating ligand. In contrast, the capacity of LDp was unchanged after several cycles of consecutive loading (with Cu2+) and stripping. Sulphuric acid (0.5 M) was the most suitable stripping reagent.

Original languageEnglish
Peer-reviewed scientific journalEuropean Polymer Journal
Volume24
Issue number9
Pages (from-to)867-872
Number of pages6
ISSN0014-3057
DOIs
Publication statusPublished - 1988
Externally publishedYes
MoE publication typeA1 Journal article - refereed

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