Effect of Temperature on Synthesis of Hydroxyapatite/Chitosan Composite Using the <i>In-Situ</i> Method as a Heavy Metal Adsorbent
Removing hazardous non-organic waste containing heavy metals like copper and lead is crucial for environmental protection. Adsorption offers a promising solution, with hydroxyapatite (HAp) serving as a biocompatible adsorbent due to its active surface area. However, its mechanical limitations necess...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Department of Chemistry, Universitas Gadjah Mada
2025-01-01
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| Series: | Indonesian Journal of Chemistry |
| Subjects: | |
| Online Access: | https://jurnal.ugm.ac.id/ijc/article/view/93816 |
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| Summary: | Removing hazardous non-organic waste containing heavy metals like copper and lead is crucial for environmental protection. Adsorption offers a promising solution, with hydroxyapatite (HAp) serving as a biocompatible adsorbent due to its active surface area. However, its mechanical limitations necessitate enhancement through compositing with chitosan (CTS), a natural biopolymer. This study synthesized hydroxyapatite from cuttlefish bone as a calcium source, while chitosan was extracted from shrimp shells. The hydroxyapatite/chitosan (HAp/CTS) composites were prepared in situ at varying temperatures (55, 60, 65, 70, and 75 °C). The composites were characterized using FTIR, XRD, SEM, and SAA. The result indicated successful integration of HAp and CTS, with a crystallite size of 13.82 nm in the 65 °C composite. Based on SEM-EDS analysis, the HAp/CTS 65 °C morphology was agglomerated chunk particles with a Ca/P ratio of 1.61. The highest adsorption capacity value is found in the HAp/CTS 65 °C composite for both ions, 1.9979 mg/g for Cu2+ ions and 0.9965 for Pb2+ ions. The reusability test results of the HAp/CTS 65 °C composite succeeded up to two cycles. This research proves that the adsorption of Cu2+ and Pb2+ ions by HAp/CTS composite adsorbent has been successfully carried out. |
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| ISSN: | 1411-9420 2460-1578 |