Gala DS, Rahmanpiu R, Mulyana WO. Application of Silica Adsorbent Rice Husk Ash-Activated Carbon in Refining Waste Cooking Oil. HJKK [Internet]. 2025 Mar. 6 [cited 2025 Sep. 30];13(1):197-208. Available from: https://ojspanel.undikma.ac.id/index.php/hydrogen/article/view/14802