Comparative Study of Cu Ion Adsorption by Nano-Hydroxyapatite Powder Synthesized from Chemical Reagents and Clam Shell-Derived Calcium Sources.

Shih-Ching Wu, Hsueh-Chuan Hsu, Hong-Yi Ji, Wen-Fu Ho

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Article in Nanomaterials (Basel, Switzerland), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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Shih-Ching WuDepartment of Dental Technology and Materials Science, Central Taiwan University of Science and Technology, Taichung 406053, Taiwan.

Hsueh-Chuan HsuDepartment of Dental Technology and Materials Science, Central Taiwan University of Science and Technology, Taichung 406053, Taiwan.ORCID 0000-0002-2643-1680

Hong-Yi JiDepartment of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 811726, Taiwan.

Wen-Fu HoDepartment of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 811726, Taiwan.ORCID 0000-0003-2355-7939

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6 · The paper itself

Abstract

The increasing contamination of water sources by heavy metals necessitates the development of efficient and sustainable adsorption materials. This study evaluates the potential of nano-hydroxyapatite (HA) powders synthesized from chemical reagents (Chem-HA) and clam shells (Bio-HA) as adsorbents for Cu ions in aqueous solutions. Both powders were synthesized using microwave irradiation at 700 W for 5 min, resulting in nano-sized rod-like particles confirmed as HA by X-ray diffraction (XRD). Bio-HA exhibited higher crystallinity (67.5%) compared to Chem-HA (34.9%), which contributed to Bio-HA's superior adsorption performance. The maximum adsorption capacities were 436.8 mg/g for Bio-HA and 426.7 mg/g for Chem-HA, as determined by the Langmuir isotherm model. Kinetic studies showed that the Cu ion adsorption followed the pseudo-second-order model, with Bio-HA achieving equilibrium faster and displaying a higher rate constant (6.39 × 10⁻

Indexed as

clam shellsCu ionsheavy metal adsorptionhydroxyapatitemicrowave synthesis

Identifiers

PMID39269093

DOI10.3390/nano14171431

PMCPMC11397395

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