Mesoporous and high-surface-Area activated carbon from defatted olive cake by-products of olive mills for the adsorption kinetics and isotherm of methylene blue and acid blue 29
Author | Marrakchi, F. |
Author | Hameed, B.H. |
Author | Bouaziz, Mohamed |
Available date | 2022-03-23T06:05:26Z |
Publication Date | 2020 |
Publication Name | Journal of Environmental Chemical Engineering |
Resource | Scopus |
Identifier | http://dx.doi.org/10.1016/j.jece.2020.104199 |
Abstract | The K2CO3 activation of defatted olive cake in N2 atmosphere was attempted for activated carbon (DOC-AC) preparation to test its ability for the adsorption of methylene blue (MB) and acid blue 29 (AB 29). The optimum conditions obtained by Box–Behnken design was 3.0 g/g impregnation ratio, 800 °C activation temperature, and 120 min activation time. These conditions led to 20.84 % carbon yield and 98.92 % MB, and 94.63 % AB 29 removal. The best DOC-AC showed a highly porous structure with 988.75 m2 /g SBET and 0.53 cm3 /g total pore volume. Batch mode adsorption was performed at different initial dye concentrations (25–400 mg/L), pH (3–11), temperature (30–50 °C), and contact time (0–26 h). The kinetic and equilibrium adsorption data of both dyes were fitted to pseudo-second-order and Langmuir models, respectively. Monolayer adsorption capacities were 359.38 mg/g for MB and 157.58 mg/g for AB 29. After six successive regeneration cycles, the adsorption efficiency for both dyes was > 70 %, indicating good potential of the DOC-AC for commercial applications. |
Language | en |
Publisher | Elsevier Ltd |
Subject | Adsorption Defatted olive cake Isotherms Kinetics Potassium carbonate activation Reusability |
Type | Article |
Issue Number | 5 |
Volume Number | 8 |
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