Work

Enhanced surface properties of coralline hydroxyapatite from natural resources of Depapre Coast, Papua

Year: 2026

Type: article

Abstract: Hydroxyapatite (HAp) is gaining significant attention because of the structural similarity to bone mineral and versatile applications in both biomedical and environmental fields. Therefore, this study aimed to synthesize coralline HAp from dead coral collected along the Depapre coast, Papua, through calcination of coral powder and precipitation, followed by surface modification using potassium hydroxide (KOH) at two concentrations (0.5 M and 2.5 M). The structural and physicochemical properties of the materials were characterized by XRD, FTIR, SEM-EDS, and BET analyses. The results showed that CaCO 3 was successfully transformed into crystalline HAp with characteristic phosphate and hydroxyl groups, while SEM-EDS had porous morphologies and Ca/P ratios consistent with HAp. BET analysis showed that Depapre-derived coralline HAp had an exceptionally high surface area (>500 m²/g), significantly greater than typical values reported for synthetic HAp. Mild KOH activation (0.5 M) further enhanced porosity and adsorption-relevant surface properties, while concentrated treatment (2.5 M) led to partial re-carbonation and decreased surface area. These results showed that coral-derived HAp from Depapre provided a sustainable and highly porous material with promising potential for heavy metal adsorption and other environmental applications.

Source: Next Materials

DOI: 10.1016/j.nxmate.2026.101628

Authors: Octolia Togibasa, Khaeriah Dahlan, Benny Abraham Bungasalu, Krista Maya Ansanay, Himawan, Lalu Panji Imam Agamawan

Institution: Cenderawasih University

Language: English

Topic: Bone Tissue Engineering Materials

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: gold

Estimated APC paid: $1,280