S. Nengsih, S.N. Madjid, Mursal, Z. Jalil
Iron sand is abundant in Aceh but it has not been supported by maximum efforts to improve the quality and usability of this material, it is only used as a raw material in the industry. This research aims to synthesize and characterize Syiah Kuala iron sand to become magnetite by the co-precipitation method. Prior to synthesis, iron sand was separated from impurities with a bar magnet and sieved with a size of 200 mesh. 37% HCl was added to the iron sand while stirring and heated at 70°C as the first step in the synthesis. After being filtered, the iron sand precipitate was added with 6.5 M NH4OH then stirred and heated. At this stage, a precipitate is formed and then washed until the pH is normal and dried. XRF data shows the total composition of Fe elements and Fe2O3 compounds from Syiah Kuala iron sands is 87.1 mass % and 84.2 mass %, respectively. XRD data shows that iron sand before and after synthesis has the same phase, namely the magnetite phase with a lattice structure of FCC. The high density of magnetite particles showed by SEM but the particle uniformity is still low. The effect of oxidation by outside air during synthesis causes the particles to agglomerate with a size range of 500 nm - 3000 nm. The Fe-O functional group was found from the FTIR analysis. Therefore, the Syiah Kuala iron sand has crystal purity quality and the opportunity to develop in various science and technology applications. © Published under licence by IOP Publishing Ltd.
Graduate School of Mathematics and Applied Science, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia; Department of Physics Engineering, Science and Technology Faculty, Universitas Islam Negeri Ar-Raniry, Banda Aceh, 23111, Indonesia; Department of Physics, Natural Science and Mathematics Faculty, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia
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