Hassim, Nur Afiqah Aina, Khee Chung Hui, Dita Floresyona, Norashikin Ahmad Kamal, and Nonni Soraya Sambudi. 2022. “Effect of PH on Adsorption of Cu2+ by Using Composite of Polyvinyl Alcohol (PVA)/Kaolin”. ASEAN Journal of Chemical Engineering 22 (1), 93-104. https://jurnal.ugm.ac.id/v3/AJChE/article/view/9230.