Influence of humidity,temperature, and the addition of activated carbon on the preparation of cellulose acetate membranes and their ability to remove arsenic from water |
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| Authors: | Luisa Piroshka Terrazas‐Bandala Guillermo Gonzalez‐Sanchez Ricard Garcia‐Valls Tania Gumi Isabelle Beurroies Renaud Denoyel Carles Torras Lourdes Ballinas‐Casarrubias |
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| Affiliation: | 1. Department of Renewable Energies and Environmental Protection, Centro de Investigación en Materiales Avanzados (CIMAV S.C.), México;2. Graduate Department, Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua (UACH), México;3. Department of Chemical Engineering, ETSEQ—Universitat Rovira i Virgili, Tarragona, Spain;4. Laboratoire Madirel, CNRS‐Université de Provence, Marseille, France;5. Catalonia Institute for Energy Research, Tarragona, Spain |
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| Abstract: | Several composite membranes have been prepared from cellulose triacetate (CTA) and activated carbon (AC) by solvent casting, varying temperature from 35 to 55°C and relative humidity (RH): 10–70%. Some conditions promoted AC particle agglomeration which is evidenced by SEM and IFME® program. In those membranes, where homogeneity is attained, a deep characterization has been carried out by DMA, MDSC, thermoporometry, solute transport, and AFM. When AC is added in films, Tg is lowered and the fraction of pores with bigger size is augmented. Molecular weight cut off calculated by solute transport, increases from 801.15 to 1194.29 kDa using 1% AC at RH 70% and T 35°C. Water flux is of 5.23 Lm?2 h?1 bar?1. Arsenic removal has been performed, achieving a 45% tested from a 500 ppb arsenic solution, where several factors such as electrical rejection, adsorption and exclusion, could contribute to the total membrane nanofiltration process. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40134. |
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| Keywords: | cellulose and other wood products membranes morphology |
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