Systematic Modulation of Thiol Functionalities in Inexpensive Porous Polymers for Effective Mercury Removal

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Through accumulation, mercury contamination in aquatic systems still poses serious health risks despite the strict regulations on drinking water and industrial discharge. One effective strategy against this is adsorptive removal, in which a suitably functionalized porous material is added to water treatment protocols. Thiol (SH) group-grafted structures perform commendably; however, insufficient attention is paid to the cost, scalability, and reusability or how the arrangement of sulfur atoms could affect the Hg-II binding strength. We used an inexpensive and scalable porous covalent organic polymer (COP-130) to systematically introduce thiol functional groups with precise chain lengths and sulfur content. Thiol-functionalized COP-130 demonstrates enhanced wettability and excellent Hg-II uptake of up to 936 mg g(-1), with fast kinetics and exceptionally high selectivity. These Hg adsorbents are easily regenerated with HCl and can be used at least six times without loss of capacity even after treatment with strong acid, a rare performance in the domain of Hg-removal research.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2022-12
Language
English
Article Type
Article
Citation

CHEMISTRY-A EUROPEAN JOURNAL, v.28, no.72

ISSN
0947-6539
DOI
10.1002/chem.202202340
URI
http://hdl.handle.net/10203/305189
Appears in Collection
CBE-Journal Papers(저널논문)
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