Ntwampe, Oupa, and K. Moothi. 2018. “Investigation of the Effect of a Flocculent of Bentonite Clay With MgCO3 in Synthetic Acid Mine Drainage (AMD) Treatment”. Journal of Applied Chemical Sciences 5 (2), 435-44. https://ejurnal.undana.ac.id/index.php/jacs/article/view/2006.