Simultaneous adsorption of Cu(II), Zn(II), Cd(II) and Pb(II) from synthetic wastewater using NaP and LTA zeolites prepared from biomass fly ash
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2023-10
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Language
en
Pages
15
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Heliyon, Volume 9, issue 10
Abstract
Herein, NaP and LTA zeolites were successfully synthesised from woody biomass ash with alkali fusion-assisted hydrothermal method by altering the NaOH/ash ratio, crystallisation time and crystallisation temperature. In order to reduce the synthesis costs, NaP zeolite was synthesised with no additional source of aluminium and silicon. The synthesised zeolites were utilized for the monocomponent and simultaneous adsorption of Cu(II), Cd(II), Pb(II) and Zn(II) ions. The maximum adsorbed amount of metals had the trend Pb(II) > Cu(II) > Cd(II) > Zn(II) for both NaP and LTA zeolite. The kinetic data fit well to the pseudo-second order model indicating that chemisorption is the rate-limiting step. The isotherm data were well described with Sips and Redlich-Peterson models indicating a non-ideal heterogeneous adsorption process. Maximum adsorption capacity of NaP zeolite was 42.9 mg/g for Cu(II) and 117.3 mg/g for Cd(II), while LTA had 140.1 mg/g and 223.5 mg/g for Cu(II) and Cd(II) ions, respectively.Description
Funding Information: The authors would like to thank the Walter Ahlström Foundation, Finland for their financial support in this research work. The authors would like to acknowledge the contribution of M.Sc. Mohammadamin Esmaeili from LUT University for the SEM analysis. Publisher Copyright: © 2023
Keywords
Adsorption, Biomass ash, Isotherm, Kinetics, Zeolite synthesis
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Citation
Küçük, M E, Makarava, I, Kinnarinen, T & Häkkinen, A 2023, ' Simultaneous adsorption of Cu(II), Zn(II), Cd(II) and Pb(II) from synthetic wastewater using NaP and LTA zeolites prepared from biomass fly ash ', Heliyon, vol. 9, no. 10, e20253 . https://doi.org/10.1016/j.heliyon.2023.e20253