Evaluation of the Potential of Boiler Ash from Palm Oil Millas an Alternative Material for the Improvement of Acid Coal Main Drainage. Pak. J. Anal. Environ. Chem. [Internet]. 2024 Nov. 16 [cited 2025 Jun. 21];25(1):90-8. Available from: https://pjaec.pk/index.php/pjaec/article/view/9