Mahmud, Khoirun Nisa, Tan Hui Wen, and Zainul Akmar Zakaria. “Activated Carbon and Biochar from Pineapple Waste Biomass for the Removal of Methylene Blue”. Environmental and Toxicology Management 1, no. 1 (April 30, 2021): 30–36. Accessed November 21, 2024. https://journal2.unusa.ac.id/index.php/ETM/article/view/2036.