Optimasi Presipitasi Besi dari Pelindian Bijih Laterit Menggunakan H₂SO₄

Dina Abas, Akram La Kilo, Kostiawan Sukamto

Abstract


This study aims to optimize the iron precipitation process from the sulfuric acid leachate of laterite ore. Precipitation was carried out through a staged pH adjustment method using CaCO₃ to selectively separate iron without affecting the presence of other valuable metals. Laterite ore was obtained from Siuna Village, Pagimana District, Central Sulawesi, and leached to produce a metal-rich solution (PLS). The precipitation process was conducted in two stages at pH 1.5 and 3.5, with temperatures of 90°C and 70°C, respectively. Atomic Absorption Spectroscopy (AAS) analysis showed a decrease in iron concentration from 119.58 ppm to 0.434 ppm, achieving a precipitation efficiency of 99.63%. X-Ray Diffraction (XRD) analysis indicated that the resulting precipitate had a crystallinity of 65.1%. These results demonstrate that the staged precipitation method using CaCO₃ is effective for iron removal from laterite leach solutions. This method is suitable as a prelimi

Keywords


iron precipitation; laterite ore; sulfuric acid; CaCO₃; efficiency

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DOI: https://doi.org/10.37905/je.v20i1.32398

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