Oetjik, Wahyunirahma, and Siti Aida Ibrahim. “A Review: The Effect of Initial Dye Concentration and Contact Time on The Process of Dye Adsorption Using Agricultural Wastes Adsorbent ”. Progress in Engineering Application and Technology 2, no. 2 (December 5, 2021): 1051–1059. Accessed July 18, 2024. https://penerbit.uthm.edu.my/periodicals/index.php/peat/article/view/3589.