Preparation And Characterization Of Phase Inversion Poly (Vinyl Alcohol) / Multi-Walled Carbon Nanotubes Dye Removal Adsorbents
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Date
2021-07-01
Authors
Mohamad Anuar, Siti Aisyah
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Textile industries produce a lot of wastewater which contains a significant number of
pollutants, including dyes such as methylene blue. Engineered adsorptive materials having
inorganic constituent incorporated polymeric matrix provide the possibility of removing a wide
range of pollutants. In this study, poly (vinyl alcohol)/ multi-walled carbon nanotubes
adsorbents were prepared via phase inversion process. Adding multi-walled carbon nanotubes
which is a typical mesoporous material with average pore diameter of 3.4 nm to the poly (vinyl
alcohol) adsorbents provided a microporous and asymmetric structure for the adsorptive
adsorbents in methylene blue dye removal. In order to find the optimum condition, the
adsorption capacity was examined at various operating parameters, such as initial
concentration, contact time and adsorbent dosage. The adsorption capacity of 0.068 mg/g and
the highest removal efficiency of 56.21 % were obtained at initial dye concentration of 2.00
mg/L at 4 hours adsorption time by applying 1.00 g of poly (vinyl alcohol)/ multi-walled carbon
nanotubes adsorbents. The experimental data were fitted well with the Freundlich adsorption
isotherm model compared with the Langmuir adsorption isotherm model and the adsorption
kinetic data verified the best fitting with the pseudo-second-order model.