Aritonang B, Ritonga AH, Harefa K, Wiratma DY, Herlina. Purification of used Cooking Oil using a Combination of Activated Carbon and Bentonite Adsorbents. JFM [Internet]. 2024 Oct. 31 [cited 2024 Nov. 20];7(1):31-40. Available from: https://ejournal.medistra.ac.id/index.php/JFM/article/view/2331