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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
Author(s) -
TerrazasBandala Luisa Piroshka,
GonzalezSanchez Guillermo,
GarciaValls Ricard,
Gumi Tania,
Beurroies Isabelle,
Denoyel Renaud,
Torras Carles,
BallinasCasarrubias Lourdes
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40134
Subject(s) - cellulose triacetate , membrane , nanofiltration , activated carbon , chemical engineering , adsorption , chemistry , cellulose acetate , relative humidity , solvent , cellulose , arsenic , materials science , polymer chemistry , nuclear chemistry , chromatography , organic chemistry , biochemistry , physics , engineering , thermodynamics
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, T g 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.