Study of The Effect of Leaching Time of Manganese Ore from Pujananting District, Barru Regency Using The Hydrometallurgical Method. JCPE [Internet]. 2025 Nov. 22 [cited 2025 Dec. 2];10(2):51-9. Available from: https://jurnal.fti.umi.ac.id/index.php/JCPE/article/view/1584