Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
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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