Synthesis and FTIR Characterization of Mg-Hydroxylapatite Derived from Dolostone with High Dolomite Mineral Content

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dc.contributor.authorMahene, Wilson
dc.contributor.authorGervas, Charles
dc.contributor.authorHilonga, Askwar
dc.contributor.authorMachunda, Revocatus
dc.date.accessioned2023-09-14T09:58:20Z
dc.date.available2023-09-14T09:58:20Z
dc.date.issued2020-08-24
dc.descriptionSDG 6: Clean Water and Sanitation, SDG 9: Industry, Innovation, and Infrastructure, SDG 12: Responsible Consumption and Production.en_US
dc.description.abstractWe present the synthesis of magnesium-substituted hydroxylapatite starting from locally available dolostone. The apatite was prepared by a reaction between heat pre-treated dolostone powder with phosphoric acid, maintained at the pH of 12.5 using sodium hydroxide. The resultant material was then calcined at 500 °C, 600 °C, 700 °C, 800 °C and 900 °C. The precursor dolostone was characterized by organic elemental analyser (CHNS-O analyser), X-ray fluorescence (XRF) and Fourier transform infrared spectroscopy (FTIR), while the synthesized material was characterized by using FTIR. Results indicated that the dominant mineral in the carbonate rock materials was near-stoichiometric dolomite, while the synthesized material was found to be (carbonate, magnesium)-substituted hydroxylapatite. The synthesized material did not exhibit hydroxylapatite diagnostic peaks until after being calcined at 600 °C. The peaks became more distinct with increase in calcination temperature. The prepared material exhibited a low degree of crystallinity and low conversion temperature to beta-tricalcium phosphate, 700–800 °C. These characteristics are typical of a magnesium-substituted hydroxylapatite (Mg-substituted β-tricalcium phosphate). This work has demonstrated the feasibility of synthesizing magnesium-substituted hydroxylapatite (Mg-HA), with potential applications in water purification, using dolostone as a calcium/magnesium sourceen_US
dc.identifier.urihttps://dx.doi.org/10.4314/tjs.v46i3.8
dc.identifier.urihttps://dspace.nm-aist.ac.tz/handle/20.500.12479/1999
dc.language.isoenen_US
dc.publisherUniversity of Dar es Salaamen_US
dc.subjectDolostone, crystallinityen_US
dc.subjectmagnesium-substituted hydroxylapatiteen_US
dc.subjectagnesium- substituted beta-tricalcium phosphateen_US
dc.titleSynthesis and FTIR Characterization of Mg-Hydroxylapatite Derived from Dolostone with High Dolomite Mineral Contenten_US
dc.typeArticleen_US

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