James, A.M., Harding, S., Robshaw, T. et al. (3 more authors) (2019) Selective environmental remediation of strontium and cesium using sulfonated hypercrosslinked polymers (SHCPs). ACS Applied Materials & Interfaces, 11 (25). pp. 22464-22473. ISSN 1944-8244
Abstract
Sulfonated hypercrosslinked polymers based on 4,4’-bis(chloromethyl)-1,1’-biphenyl (BCMBP) were synthesized via metal-free (SHCP-1) and conventional Lewis acid-catalyzed (SHCP-2) Friedel-Crafts alkylation routes. The sulfonated polymers possessed BET surface areas in excess of 500 m2 g-1. SHCP-1 was investigated for its ability to extract Sr and Cs ions from aqueous solutions via the ion-exchange reaction of the sulfonic acid moiety. Equilibrium uptake data could be accurately modelled by the Dubinin-Radushkevich isotherm, with maximum calculated loading values of 95.6 ± 2.8 mg g-1 (Sr) and 273 ± 37 mg g-1 (Cs). Uptake of both target ions was rapid, with pseudo 2nd-order rate constants calcu-lated as 7.71 ± 1.1 (x 10-2) for Sr and 0.113 ± 0.014 for Cs. Furthermore, the polymer was found to be selective towards the target ions over large excesses of naturally occurring competing metal ions such as Na and K. We conclude that hyper-crosslinked polymers may offer intrinsic advantages over other adsorbents for the remediation of aqueous Sr and Cs contamination.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 American Chemical Society. This is an author-produced version of a paper subsequently published in ACS Applied Materials & Interfaces. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Porous materials; microporous polymers; metal-free synthesis; ion-exchange; separations |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 31 May 2019 13:41 |
Last Modified: | 03 Dec 2021 14:12 |
Status: | Published |
Publisher: | American Chemical Society |
Refereed: | Yes |
Identification Number: | 10.1021/acsami.9b06295 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:146752 |