Nurhawaisyah, S.R. et al. 2025. Effect of Sulfuric Acid Concentration on the Leaching Behavior of Manganese Ore from Palludda Barru Regency. Cognitia : International Engineering Journal. 1, 3 (Dec. 2025), 122–128. DOI:https://doi.org/10.63288/ciej.v1i3.14.