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All Journal Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya
Akram La Kilo
Jurusan Kimia, Universitas Negeri Gorontalo
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering

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STUDI PENGARUH VARIASI PH DAN KOLEKTOR PADA EFISIENSI FLOTASI MINERAL TEMBAGA SULFIDA Kostiawan Sukamto; Astin Lukum; Akram La Kilo
Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Vol. 7 No. 1 (2025): Publikasi Penelitian Kimia dan Terapannya 2025
Publisher : Program Studi Kimia, Fakultas MIPA, Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/jc.v7i1.5152

Abstract

This study aims to investigate the effect of pH variations and collector types on the recovery efficiency and Cu content in copper sulfide mineral samples. The experiment was conducted by varying the pH (6, 8, 10, and 12) and using different types of collectors, namely Xanthate, Potassium Amyl Xanthate (PAX), Diethyl Dithiophosphate (DTP), and a combination of PAX + DTP. Control variables included flotation time (5, 10, 15, 20, and 25 minutes), collector concentration at 50 mg/L, particle size <75 µm, and the use of Frother Methyl Isobutyl Carbinol (MIBC) at a concentration of 10 mg/L. Modifiers such as NaOH and H₂SO₄ were used to adjust the pH, while Copper Sulfate (CuSO₄) served as an activator and Sodium Metabisulfite (Na₂S₂O₅) as a depressant. The results showed that variations in pH and collector types significantly influenced recovery efficiency and Cu content in the concentrate. In general, the highest recovery efficiency was achieved at pH 10 with the combination of PAX + DTP, which resulted in a higher Cu content compared to other single collectors. This combination was able to improve recovery efficiency to over 75%, with Cu content in the concentrate reaching 28%. Therefore, the findings suggest the use of a collector combination and pH optimization as strategies to enhance the performance of copper sulfide flotation.
STUDI KINETIKA EKSTRAKSI TEMBAGA DARI BIJIH ENARGIT DALAM LARUTAN ASAM SULFAT Kostiawan Sukamto; Isal Kamumu; Ahmad Kadir Kilo; Akram La Kilo
Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Vol. 7 No. 2 (2025): Literasi Artikel Penelitian Kimia
Publisher : Program Studi Kimia, Fakultas MIPA, Universitas PGRI Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36526/jc.v7i2.6239

Abstract

This study investigates the kinetics of copper extraction from enargite ore (Cu₃AsS₄) using sulfuric acid (H₂SO₄) solution with hydrogen peroxide (H₂O₂) as an oxidizing agent. Leaching experiments were carried out under various operating conditions, including H₂SO₄ concentrations (1, 1.5, and 2 M), H₂O₂ concentrations (1, 1.5, and 3 M), solid percentages (5%, 10%, and 15%), and temperatures (30, 40, and 50 °C), with a leaching time of up to 480 minutes. The results indicated that higher concentrations of H₂SO₄ and H₂O₂ significantly enhanced copper extraction efficiency, while increasing solid percentage reduced the leaching performance. The optimum condition was achieved at 2 M H₂SO₄, 3 M H₂O₂, 5% solids, and 50 °C, resulting in a maximum copper extraction of 97.95%. Kinetic analysis revealed that the leaching process was predominantly controlled by diffusion through a porous product layer based on the shrinking core model, but shifted to interface reaction control at higher temperatures. These findings provide new insights into the leaching mechanism of enargite ore and serve as a foundation for developing more efficient and environmentally friendly hydrometallurgical processes for copper recovery.
Co-Authors Ahmad Kadir Kilo Astin Lukum Isal Kamumu Kostiawan Sukamto, Kostiawan