Chemical Tailoring of β-Cyclodextrin-Graphene Oxide for Enhanced Per- and Polyfluoroalkyl Substances (PFAS) Adsorption from Drinking Water

We report on the synthesis of β-cyclodextrin (βCD) modified graphene oxide (GO) nanosheets, having different sized alkyl linkers (GO-Cn-βCD) and their exploitation as sorbent of per- and polyfluoroalkyl substances (PFAS) from drinking water. βCD were functionalized with a pending amino group, and the resulting precursors grafted to GO nanosheets by epoxide ring opening reaction. Loading of βCD units in the range 12 %–36 % was estimated by combined XPS and elemental analysis. Adsorption tests on perfluorobutanoic acid (PFBA), a particularly persistent PFAS selected as case study, revealed a strong influence of the alkyl linker length on the adsorption efficiency, with the hexyl linker derivative GO-C6-βCD outperforming both pristine GO and granular activated carbon (GAC), the standard sorbent benchmark. Molecular dynamic simulations ascribed this evidence to the favorable orientation of the βCD unit on the surface of GO which enables a strong contaminant molecules retention.

Marforio, Tainah DorinaUniversita di Bologna,University of Bologna (författare)
Favaretto, LauraConsiglo Nazionale Delle Richerche (författare)
Mantovani, SebastianoConsiglo Nazionale Delle Richerche (författare)
Pintus, AngelaConsiglo Nazionale Delle Richerche (författare)
Bianchi, AntonioConsiglo Nazionale Delle Richerche (författare)
Kovtun, AlessandroConsiglo Nazionale Delle Richerche (författare)
Agnes, MarcoConsiglo Nazionale Delle Richerche (författare)
Palermo, Vincenzo,1972Consiglo Nazionale Delle Richerche,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)palermo (författare)
Calvaresi, MatteoUniversita di Bologna,University of Bologna (författare)
Navacchia, Maria LuisaConsiglo Nazionale Delle Richerche (författare)
Melucci, M.Consiglo Nazionale Delle Richerche (författare)
Consiglo Nazionale Delle RichercheUniversita di Bologna (creator_code:org_t)

Av författaren/redakt...: Tunioli, Frances ...; Marforio, Tainah ...; Favaretto, Laura; Mantovani, Sebas ...; Pintus, Angela; Bianchi, Antonio; visa fler...; Kovtun, Alessand ...; Agnes, Marco; Palermo, Vincenz ...; Calvaresi, Matte ...; Navacchia, Maria ...; Melucci, M.; visa färre...

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