The Comparison Effect of NaOH and KOH as The Leaching Solution for Silica from Two Different Coal Fly Ashes by Farrah Hanum Hanum, Aster Rahayu, Iqbal Hapsauqi

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Comparative Analysis of Coal Quality across Various Coal Basins in Sumatra: A Case Study of Calorific Value, Moisture Content, and Sulfur Content by Farrah Hanum Hanum, Iqbal Hapsauqi, Siti Jamilatun, Jiran Nirmalasari

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Analysis of Coal Fly Ashes from Different Combustion Processes for The Agricultural Utilization by Farrah Fadhillah Hanum, Yudhi Pramudya, Firda Mahira Alfiata Chusna, Erda Rahmilaila Desfitri, Iqbal Hapsauqi, Nafira Alfi Zaini Amrillah

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