This study aims to determine the effect of mass and contact time of phytoremediation on increasing pH, reducing TSS, Fe, and Mn levels, and determining the effectiveness of coontail plants as phytoremediators in accumulating Fe and Mn heavy metals. Phytoremediation of acid mine drainage using coontail plants was carried out with 3 variations of coontail plant mass (30, 45, and 60 g) and 3 varia…