02273naa a2200241 a 450000100080000000500110000800800410001902200140006002400520007410000210012624501240014726000090027130000110028052015310029165300210182265300160184365300240185965300270188370000170191070000230192770000180195077300630196821706082024-12-13       2024    bl uuuu     u00u1 u    #d  a2214-71447 ahttps://doi.org/10.1016/j.jwpe.2024.1061192DOI1 aALVARENGA, A. D.  aOptimization of polyvinylpyrrolidone-SiO2 microfiber membranes for efficient water purification.h[electronic resource]  c2024  a1 - 14  aEfficient removal of persistent organic pollutants from water remains a significant challenge for conventional water treatment methods. Materials containing carbon and/or SiO2 have demonstrated remarkable adsorption capacities for these pollutants. In this study, we explore the combination of carbonaceous structures and SiO2 through calcination (200 ◦C to 500 ◦C) of microfiber membranes produced with polyvinylpyrrolidone and tetraethyl orthosilicate by the solution blow spinning method, followed by chemical activation using NaOH. The developed membranes were thoroughly characterized to assess their physical and chemical properties. The performance of the ecofriendly microfiber membranes was evaluated in both batch and fixed-bed adsorption systems for methylene blue. Our findings revealed that chemical activation with NaOH effectively removed SiO2 from fibers, increasing the surface area and promoting oxidation of residual carbon, resulting in adsorption efficiency by at least 1000 %. Specifically, the fibers exhibited an average batch adsorption capacity of 873.3 mg/g, with a maximum capacity reaching 1862.4 mg/g. Fixed bed adsorption achieved 273.6 mg/g. Besides, the membrane was also tested for other organic pollutants and metal ions. The production cost of these microfibers was US$1.82/g. The strategy employed in this study, involving the creation of pores and increasing the surface area of fibers proved to be a promising approach for removing dyes and can be expanded to other water pollutants.  aBatch adsorption  aMicrofibers  aSiO2 solubilization  aSolution blow spinning1 aANDRE, R. S.1 aALVES, A. L. M. M.1 aCORREA, D. S.  tJournal of Water Process Engineeringgv. 67, 106119, 2024.