ERMADANI, Ermadani et al. Evaluation of the Potential of Boiler Ash from Palm Oil Mill as an Alternative Material for the Improvement of Acid Coal Main Drainage. Pakistan Journal of Analytical & Environmental Chemistry, [S.l.], v. 25, n. 1, p. 90-98, june 2024. ISSN 2221-5255. Available at: <>. Date accessed: 18 july 2024. doi: