Journal
JOURNAL OF CLEANER PRODUCTION
Volume 205, Issue -, Pages 303-312Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2018.09.114
Keywords
Al-modified activated carbon; Adsorption; Methylene blue; Water remediation; Langmuir isotherms; Second order kinetics
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Funding
- King Fahd University of Petroleum & Minerals (KFUPM) - Saudi Arabia [DSR NUS15105]
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Facile and efficient adsorbent was prepared by modification of the activated carbon (AC) with aluminium (Al). Impregnation of commercial AC with varying weight percents (1, 2, 5 and 10%) of Al, using aluminium nitrate solution, resulted to AC-Al of differing Al-loading amounts and the composites were investigated for their sorption capacity of methylene blue (MB) in aqueous phase. Adsorbent characteristics with respect to cationic dye (MB) adsorption efficiency was studied by N-2-physisorption, Raman spectroscopy, FUR and Boehm titration. The AC-Al (2) adsorbent containing 2 wt % Al loaded on AC yielded the best performance due to better acidic and basic properties, with little compromise on surface area. Parametric investigation indicated a fast sorption process which is endothermic in nature. The Langmuir isotherm well described the adsorption process with a maximum adsorption capacity of 181.82 mg/g. The kinetic studies showed that the adsorption process followed a pseudo-second order kinetics. The high removal efficiency of the AC-Al (2) indicated its immense potential in toxic water remediation. (C) 2018 Elsevier Ltd. All rights reserved.
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