Composites of chemically modified graphene oxide nanosheets and natural polymers for water treatment
Francesca Tunioli a, Sara Khaliha a, Sebastiano Mantovani a, Antonio Bianchi a, Alessandro Kovtun a, Tainah Dorina Marforio b, Matteo Calvaresi b, Vincenzo Palermo a c, Manuela Melucci a
a Consiglio Nazionale delle Ricerche-Istituto per la Sintesi organica e la Fotoreattività (ISOF-CNR), via P. Gobetti 101, 40129 Bologna
b Alma Mater Studiorum Università degli studi di Bologna, Via Zamboni, 33, Bologna, Italy
c Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
#2DSUSY - 2D Nanomaterials for Sustainable Energy
València, Spain, 2023 March 6th - 10th
Organizers: Maria Antonia Herrero Chamorro and Maurizio Prato
Poster, Francesca Tunioli, 325
Publication date: 22nd December 2022

The so called “emerging contaminants” (ECs) (which include pharmaceuticals, cosmetics, pesticides and polyfluoroalkyl substances (PFAS)) are increasingly found in tap water. [1] This calls for the urgent development of new treatment technologies.  Graphene based nanomaterials have shown great potential for water purification due to their high surface area and their adsorption properties, promoted by multiple interaction pathways with organic molecules and metal ions. [2], [3] Here, we report on the synthesis of GO modified with L-lysine (an amino acid) and   b-cyclodextrin (a chelating unit), which results effective in the removal of ECs including perfluorobutanoic acid, one of the most persistent PFAS found in tap water. The adsorption capacity was tested in batch and flow condition, with remarkable results (removal up to 60% after 15 min, vs 9% of granular activated carbon, the industrial benchmark). Moreover, we also describe the preparation and performance of composites based on the combination of such modified graphene materials and natural polymers, including alginate, polylactic acid and polycaprolactone.

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