Studi pengaruh pemanggangan pada 700 oc dan variasi konsentrasi larutan naoh dan hcl pada proses pelindian terhadap peningkatan kadar tantalum dan niobium oksida dalam terak timah = The study of effect 700 oc roasting and leaching process with concentration variable of naoh and hcl solutions for increasing tantalum and niobium oxide s grade in tin slag

Pengaruh jenis dan konsentrasi larutan leaching terhadap recovery logam emas dan tembaga dari hasil daur ulang printed circuit board = Effect of type and concentration of leaching solution towards the recovery of gold and copper metals from recycled printed circuit board

Pengaruh temperatur terhadap perolehan kembali platina dan emas dalam pelindian bijih emas refraktori pertambangan rakyat menggunakan asam klorida = The effect of leaching temperature on recovery of platinum and gold leaching from Indonesian refractory ore in acidic chloride solution

Optimalisasi pelindian emas bijih sulfida tinggi hasil penambangan daerah Bolaang Mongondow, Sulawesi Utara pada larutan chloride-hypochlorite dengan variabel volume soidum hypochlorite dan waktu pelindian = Chloride-hypochlorite gold leaching optimalization of Bolaang Mongondow high sulphide ore with variation of sodium hypochlorite volume and leaching time

Perolehan Kembali Logam Kobalt dari Limbah Baterai Li-ion Melalui Proses Pelindian HCl dengan Penambahan H2O2 dan Ekstraksi dengan Cyanex 272 = Recovery of Cobalt Metal from Spent Li-ion Battery through HCl Leaching Process with Addition of H2O2 and Extraction with Cyanex 272