Details
| Original language | English |
|---|---|
| Number of pages | 20 |
| Journal | BIOMASS CONVERSION AND BIOREFINERY |
| Early online date | 13 Nov 2024 |
| Publication status | E-pub ahead of print - 13 Nov 2024 |
Abstract
In this study, activated carbon derived from black fruit kernels decorated with iron(III) oxide nanoparticles (AC@NPs) was prepared for effective adsorption of malachite green in batch mode. The adsorbents were characterized using FT-IR, XRD, SEM/EDX, TGA, and BET/BJH techniques. The effect of contact time, pH, initial concentration, and temperature was evaluated. Incorporation of NPs diminished the specific surface area by ~ 9.6%. However, this was accompanied by increase in equilibrium maximum adsorption capacity from 600 to 700 mg·g−1 for AC and AC@NPs, respectively. The equilibrium data were best described by Hill’s isotherm and the pseudo-second-order (PSO) kinetic model. The PSO rate constants were indistinguishable implying the changes in surface chemistry, surface area, and porosity structures only affected equilibrium and not kinetics. Pore-diffusion was the sole rate-determining step for the upkate of MG onto AC@NPs. The adsorption of MG is inferred to be equilibrium-driven. The adsorption enthalpy of − 12 kJ·mol−1 for AC and 52.602 kJ·mol−1 for AC@NPs corresponding to the transition from exothermic physisorption to endothermic chemisorption denotes iron NPs introduced functional surfaces with increased binding energies. Impregnation with iron(III) oxide is shown to be an applicable strategy for tuning surface chemistry to increase adsorbent performance for MG removal from water.
Keywords
- Activated carbon, Adsorption capacity, Composite material, Equilibrium-driven adsorption, Iron oxide
ASJC Scopus subject areas
Sustainable Development Goals
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In: BIOMASS CONVERSION AND BIOREFINERY, 13.11.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Enhanced adsorption of malachite green onto a composite material activated carbon and iron(III) oxide nanoparticles
T2 - isotherm, kinetic, and thermodynamic study
AU - Lincold, Magapgie N.
AU - Jules, Mabou L.
AU - Guy, Ngassa P.
AU - Suzanne, Makota
AU - Jacques, Mbouombouo B.
AU - Sylvain, Tome
AU - Shikuku, Victor O.
AU - Tchieta, Gerard P.
N1 - Publisher Copyright: © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.
PY - 2024/11/13
Y1 - 2024/11/13
N2 - In this study, activated carbon derived from black fruit kernels decorated with iron(III) oxide nanoparticles (AC@NPs) was prepared for effective adsorption of malachite green in batch mode. The adsorbents were characterized using FT-IR, XRD, SEM/EDX, TGA, and BET/BJH techniques. The effect of contact time, pH, initial concentration, and temperature was evaluated. Incorporation of NPs diminished the specific surface area by ~ 9.6%. However, this was accompanied by increase in equilibrium maximum adsorption capacity from 600 to 700 mg·g−1 for AC and AC@NPs, respectively. The equilibrium data were best described by Hill’s isotherm and the pseudo-second-order (PSO) kinetic model. The PSO rate constants were indistinguishable implying the changes in surface chemistry, surface area, and porosity structures only affected equilibrium and not kinetics. Pore-diffusion was the sole rate-determining step for the upkate of MG onto AC@NPs. The adsorption of MG is inferred to be equilibrium-driven. The adsorption enthalpy of − 12 kJ·mol−1 for AC and 52.602 kJ·mol−1 for AC@NPs corresponding to the transition from exothermic physisorption to endothermic chemisorption denotes iron NPs introduced functional surfaces with increased binding energies. Impregnation with iron(III) oxide is shown to be an applicable strategy for tuning surface chemistry to increase adsorbent performance for MG removal from water.
AB - In this study, activated carbon derived from black fruit kernels decorated with iron(III) oxide nanoparticles (AC@NPs) was prepared for effective adsorption of malachite green in batch mode. The adsorbents were characterized using FT-IR, XRD, SEM/EDX, TGA, and BET/BJH techniques. The effect of contact time, pH, initial concentration, and temperature was evaluated. Incorporation of NPs diminished the specific surface area by ~ 9.6%. However, this was accompanied by increase in equilibrium maximum adsorption capacity from 600 to 700 mg·g−1 for AC and AC@NPs, respectively. The equilibrium data were best described by Hill’s isotherm and the pseudo-second-order (PSO) kinetic model. The PSO rate constants were indistinguishable implying the changes in surface chemistry, surface area, and porosity structures only affected equilibrium and not kinetics. Pore-diffusion was the sole rate-determining step for the upkate of MG onto AC@NPs. The adsorption of MG is inferred to be equilibrium-driven. The adsorption enthalpy of − 12 kJ·mol−1 for AC and 52.602 kJ·mol−1 for AC@NPs corresponding to the transition from exothermic physisorption to endothermic chemisorption denotes iron NPs introduced functional surfaces with increased binding energies. Impregnation with iron(III) oxide is shown to be an applicable strategy for tuning surface chemistry to increase adsorbent performance for MG removal from water.
KW - Activated carbon
KW - Adsorption capacity
KW - Composite material
KW - Equilibrium-driven adsorption
KW - Iron oxide
UR - http://www.scopus.com/inward/record.url?scp=85216653908&partnerID=8YFLogxK
U2 - 10.1007/s13399-024-06277-8
DO - 10.1007/s13399-024-06277-8
M3 - Article
AN - SCOPUS:85216653908
JO - BIOMASS CONVERSION AND BIOREFINERY
JF - BIOMASS CONVERSION AND BIOREFINERY
SN - 2190-6815
ER -