OPTIMALISASI PELINDIAN BIJIH MANGAN ASAL TIMOR TENGAH UTARA MENGGUNAKAN H2O2 SEBAGAI PEREDUKSI

Optimization of manganese ore leaching process from North Central Timor, Indonesia has been investigated. The final product of the leaching process was MnSO4. Variables that were optimized during the process were volume of H2O2, reaction temperature, and reaction time. The final products were characterized by FTIR, powder-XRD, XRF, and AAS. Experimental data shows that the optimum conditions for the leaching process were 50 mL H2SO4 4 M, 25 mL H2O2 2 M, in which the reaction was done at room temperature for two hours. This optimum condition resulting in 38.2% of Mn extraction with 96.88% purity. Based on powder-XRD, the products were a mixture of crystalline MnSO4.4H2O, MnSO4.5H2O and [NH4]8[Mn8(SO4)12].Penelitian optimalisasi proses pelindian bijih mangan dari Timor Tengah Utara, Indonesia telah dilakukan. Produk akhir proses pelindian berupa MnSO4. Variabel yang dioptimalkan selama proses pelindian adalah volume H2O2, suhu reaksi, dan waktu reaksi. Produk akhir dikarakterisasi dengan FTIR, powder-XRD, XRF dan AAS. Data hasil penelitian menunjukkan bahwa kondisi optimum proses pelindian untuk mendapatkan MnSO4 adalah 50 mL H2SO4 4 M, 25 mL H2O2 2 M, dan reaksi dilakukan pada suhu ruang selama dua jam. Kondisi optimum ini menghasilkan ekstrasi Mn sebesar 38,2% dengan kemurnian 96,88%. Berdasarkan analisis powder-XRD, produk yang dihasilkan adalah campuran kristal MnSO4.4H2O, MnSO4.5H2O and [NH4]8[Mn8(SO4)12]