Affandi, K.A. and Bagastyo, A.Y. 2021. Removal of ammonium and phosphate in the simulated wastewater by using coal fly ash adsorbent. Sustinere: Journal of Environment and Sustainability. 5, 1 (Apr. 2021), 24–35. DOI:https://doi.org/10.22515/sustinere.jes.v5i1.129.