Siahaan, Sri Damai Yanti, Kindriari Nurma Wahyusi, Ely Kurniati, and Fachrul Nurcholis. 2025. “Optimization of Potassium Silicate Fertilizer Production from Fly Ash: Effect of KOH Concentration and Extraction Time”. CHEMICA: Jurnal Teknik Kimia 12 (1):18-24. https://doi.org/10.26555/chemica.v12i1.337.