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Erschienen in: Biomass Conversion and Biorefinery 1/2024

07.02.2023 | Original Article

Efficient removal of Cu(II) from aqueous solution using pyrolyzed oyster shells by Taguchi method

verfasst von: Zheng Liu, Shujian Wu, Rongmei Mou

Erschienen in: Biomass Conversion and Biorefinery | Ausgabe 1/2024

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Abstract

This study presented the pyrolyzed oyster shell (POS) for efficiently removing Cu(II) from aqueous solution. Design of the experiment based on the Taguchi method was implemented to identify the optimum process conditions and explore the influence of process factors (solution temperature, pyrolysis temperature, initial Cu(II) concentration, POS dosage, and reaction time) on copper removal. According to the statistical analysis, pyrolysis temperature was the most effective factor in the Cu(II) removal, and reaction time was the second dominating factor. Optimum Cu(II) removal of 99.82% was acquired at solution temperature 25 ℃, pyrolysis temperature 900 ℃, Cu(II) concentration 100 mg/L, POS dosage 0.2 g, and reaction time 30 min. The Cu(II) adsorption behavior of POS was examined by adsorption kinetics and adsorption isotherm, which displayed that the pseudo-second order model and the Langmuir isotherm model fitted to experimental data with great accuracy. Moreover, POS at 900 ℃ showed the highest adsorption capacity of 1093 mg/g. SEM–EDS, XRD, TG–DTA, FTIR, and BET techniques were applied to investigate the physicochemical features of virgin POS and used POS. The Cu(II) removal mechanism involved electrostatic interaction, cation exchange, posnjakite forming, and precipitation.

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Metadaten
Titel
Efficient removal of Cu(II) from aqueous solution using pyrolyzed oyster shells by Taguchi method
verfasst von
Zheng Liu
Shujian Wu
Rongmei Mou
Publikationsdatum
07.02.2023
Verlag
Springer Berlin Heidelberg
Erschienen in
Biomass Conversion and Biorefinery / Ausgabe 1/2024
Print ISSN: 2190-6815
Elektronische ISSN: 2190-6823
DOI
https://doi.org/10.1007/s13399-023-03884-9

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