Nabi, Md Mahmudun, and Quazi Hamidul Bari. “Adsorption Study of Methylene Blue from Aqueous Solutions onto Bituminous Coal Based Activated Carbon”. Journal of Engineering Science 13, no. 2 (January 15, 2023): 91–100. Accessed October 13, 2025. https://banglajol.info/index.php/JES/article/view/63729.