Research articles
ScienceAsia 50 (2024):ID 2024067 1-7 |doi:
10.2306/scienceasia1513-1874.2024.067
Microwave-assisted synthesis of chitosan-hydroxyapatite
composite from eggshells and its adsorption properties
Meta F. Rizkiana*, Zakia A. Salsabila, Rana I. Aulia, Helda W. Amini, Bekti Palupi, Istiqomah Rahmawati, Boy A. Fachri
ABSTRACT: One of the successful methods for dye removal is adsorption. Utilizing eggshells as a bioadsorbent is
an interesting approach to decrease negative environmental impacts and improve the economic value of this waste
material. Hydroxyapatite (HA) is a valuable biomaterial that can be derived from chicken eggshells using microwave
irradiation synthesis. This study combined chitosan (CS) with HA using the precipitation method to develop CS-HA
composite, a promising adsorbent with high adsorption capacity for dyes. Scanning electron microscopy (SEM) and
Fourier transform infrared spectroscopy (FTIR) were conducted to determine the composite biomaterials? morphology
and functional groups. The results showed that the biomaterials particles exhibit a grain-like morphology with
agglomerated spherical-shaped nanoparticles. The characteristic functional groups corresponding to HA and CS were
identified and disclosed the successful synthesis of a biocomposite, the CS-HA. Adsorption capacity toward methylene
blue of the CS-HA was investigated to discover its adsorption properties. The results showed that the equilibrium
adsorption capacity of CS-HA was 11.0 mg/g, and its adsorption isotherm model was consistent with the Freundlich
adsorption model. In addition, thermodynamic tests confirmed that the adsorption process of CS-HA was exothermic
and spontaneous, with superior adsorption performance at low temperatures.
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Research Center for Bio-based Chemical Products, Department of Chemical Engineering, Faculty of Engineering,
Universitas Jember, Jember 68121 Indonesia |
* Corresponding author, E-mail: metafitririzkiana@unej.ac.id
Received 15 Dec 2022, Accepted 5 Mar 2024
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