Abstract
Cross-linked copolymer beads were prepared by suspension polymerization of styrene (0.90 mol) and divinyl benzene (DVB) (0.10 mol) mixtures. The resulting copolymer beads with sulfonamide-based quaternary amide functions were prepared in three steps: (1) by chlorosulfonation with chlorosulfonic acid; (2) by sulfonamidation reaction with N,N-dimethylethylenediamine; and (3) by quaternization reaction with chloroacetamide. The resulting polymer resin, which had a chloroacetamide content of 2.50 mmol/g, was effective in extracting mercury from aqueous solutions. The mercury sorption capacity was around 3.0 mmol/g in non-buffered conditions. Experiments performed in identical conditions with several metal ions revealed that Cd(II), Mg(II), Zn(II), and Fe(III) ions also were extractable in low quantities (0.2–0.8 mmol/g). The sorbed mercury could be eluted by repeated treatment with hot acetic acid without hydrolysis of the amide groups.
Original language | English |
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Pages (from-to) | 2145-2153 |
Number of pages | 9 |
Journal | Desalination and Water Treatment |
Volume | 56 |
Issue number | 8 |
DOIs | |
Publication status | Published - 20 Nov 2015 |
Bibliographical note
Publisher Copyright:© 2014 Balaban Desalination Publications. All rights reserved.
Keywords
- Mercury removal
- Polymer modification
- Quaternization
- Sulfonamide