Siregar , Hari Ananda Syahputra, and Rafael remit Winardi. 2026. “Effectiveness of Acid-Activated Oil Palm Fiber and Quartz Sand Adsorbents in Reducing Wastewater Pollutant Parameters”. RESWARA: Jurnal Riset Ilmu Teknik 4 (3): 420-33. https://doi.org/10.70716/reswara.v4i3.662.