Systematic Modulation of Thiol Functionalities in Inexpensive Porous Polymers for Effective Mercury Removal.
Sirinapa WongwilawanDoyun KimThien S NguyenWonki LimSheng LiCafer T YavuzPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2022)
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.
Keyphrases
- drinking water
- aqueous solution
- fluorescent probe
- health risk
- risk assessment
- metal organic framework
- living cells
- health risk assessment
- quantum dots
- heavy metals
- tissue engineering
- high resolution
- working memory
- highly efficient
- wastewater treatment
- molecularly imprinted
- dna binding
- replacement therapy
- smoking cessation
- water soluble
- structural basis
- simultaneous determination