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Erschienen in: Journal of Material Cycles and Waste Management 2/2023

22.01.2023 | ORIGINAL ARTICLE

Characterization of Cu2+ adsorption for eco-hydroxyapatite derived from limestone sludge via hydrothermal synthesis

verfasst von: Ya-Wen Lin, Sheng-Yuan Peng, Wei-Hao Lee, Yan-Yu Lin, Ming-Jui Hung, Kae-Long Lin

Erschienen in: Journal of Material Cycles and Waste Management | Ausgabe 2/2023

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Abstract

This study developed a novel approach to the hydrothermal synthesis of eco-hydroxyapatite (eco-HPA) from recycled limestone sludge for the removal of Cu2+ from aqueous solutions. The resulting eco-HPA was characterized using X-ray fluorescence, thermal field emission scanning electron microscope, X-ray powder diffraction analysis, and Brunauer–Emmett–Teller surface area measurements. Under a hydrothermal temperature of 120 °C and Ca/P molar ratio of 1, this study obtained the nitrogen adsorption isotherm and desorption curves indicative of hydroxyapatite. Based on the IUPAC classification system, these are the type-IV adsorption isotherm curves of a mesoporous structure with an H3-type hysteresis loop. The same sample achieved an adsorption capacity of 210 mg/g. The adsorption kinetics closely fit the pseudo-second-order kinetic model (R2 = 0.9990–1.000). Adsorption isotherms presented the strongest correlation with the Langmuir model (R2 = 0.97–0.99), exceeding that of the Freundlich model (R2 = 0.91–0.98). Taken together, these results demonstrate that the proposed eco-HAP is a viable low-cost environmentally friendly adsorbent with broad applicability for the removal of heavy metals from aqueous solutions.

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Literatur
28.
Zurück zum Zitat Ayodele O, Olusegun SJ, Oluwasina OO, Okoronkwo EA, Olanipekun EO, Mohallem ND, Guimarães WG, de M Gomes BLF, de O Souza G, Duarte HA (2021) Experimental and theoretical studies of the adsorption of Cu and Ni ions from wastewater by hydroxyapatite derived from eggshells. Environ. Nanotechnol Monit Manag 15:100439. https://doi.org/10.1016/j.enmm.2021.100439 Ayodele O, Olusegun SJ, Oluwasina OO, Okoronkwo EA, Olanipekun EO, Mohallem ND, Guimarães WG, de M Gomes BLF, de O Souza G, Duarte HA (2021) Experimental and theoretical studies of the adsorption of Cu and Ni ions from wastewater by hydroxyapatite derived from eggshells. Environ. Nanotechnol Monit Manag 15:100439. https://​doi.​org/​10.​1016/​j.​enmm.​2021.​100439
Metadaten
Titel
Characterization of Cu2+ adsorption for eco-hydroxyapatite derived from limestone sludge via hydrothermal synthesis
verfasst von
Ya-Wen Lin
Sheng-Yuan Peng
Wei-Hao Lee
Yan-Yu Lin
Ming-Jui Hung
Kae-Long Lin
Publikationsdatum
22.01.2023
Verlag
Springer Japan
Erschienen in
Journal of Material Cycles and Waste Management / Ausgabe 2/2023
Print ISSN: 1438-4957
Elektronische ISSN: 1611-8227
DOI
https://doi.org/10.1007/s10163-023-01593-z

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