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Water pollution with pharmaceutical and personal care products has become aserious environmental. A reasonable strategy to mitigate the problem involvesabsorbent materials. In particular, the use of natural clays is an advantageousalternative considering their high adsorption capacity and compatibility withthe environment. In the present work, the efficacy of a Cuban natural clay(palygorskite, Pal) as support of sulfamethoxazole (SMX), an antibioticconsidered an emerging contaminant (EC), was evaluated. The amount of SMXincorporated onto clay was determined by UV spectroscopy. The resultingcomposite material was characterized by infrared spectroscopy (IR), X-raydiffraction (XRD), thermogravimetric analysis (TG/DTG), zeta potential (ZP),nitrogen adsorption measurements and transmission electron microscopy (TEM).The drug desorption studies in aqueous solution indicated the reversibility ofthe incorporation process, suggesting the potential use of the Pal nanoclay asan effective support of SMX and hence, a good prospect for waterdecontamination.

Cuban natural palygorskite nanoclays for the removal of sulfamethoxazole from aqueous solutions