Mesoporous-activated carbon prepared from chitosan flakes via single-step sodium hydroxide activation for the adsorption of methylene blue.

Author(s) Marrakchi, F.; Ahmed, M.J.; Khanday, W.A.; Asif, M.; Hameed, B.H.
Journal Int J Biol Macromol
Date Published 2017 May
Abstract

In this work, mesoporous-activated carbon (CSAC) was prepared from chitosan flakes (CS) via single-step sodium hydroxide activation for the adsorption of methylene blue (MB). CSAC was prepared using different impregnation ratios of NaOH:CS (1:1, 2:1, 3:1, and 4:1) at 800°C for 90min. The adsorption performance of CSAC was evaluated for MB at different adsorption variables, such MB initial concentrations (25-400mg/L), solution pH (3-11), and temperature (30-50°C). The adsorption isotherm data of CSAC-MB were well fitted to Langmuir model with a maximum adsorption capacity 143.53mg/g at 50°C. Best representation of kinetic data was obtained by the pseudo-second order model. CSAC exhibited excellent adsorption uptake for MB and can potentially be used for other cationic dyes.

DOI 10.1016/j.ijbiomac.2017.01.119
Keywords Adsorption; Charcoal; Chitosan; Hydrogen-Ion Concentration; Kinetics; Methylene Blue; Porosity; Sodium Hydroxide; Temperature; Water Pollutants, Chemical
ISSN 1879-0003
Citation Marrakchi F, Ahmed MJ, Khanday WA, Asif M, Hameed BH. Mesoporous-activated carbon prepared from chitosan flakes via single-step sodium hydroxide activation for the adsorption of methylene blue. Int J Biol Macromol. 2017;98:233-239.

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