Suma Y, Pasukphun N, Eaktasang N. Adsorption of Methylene Blue by Low-Cost Biochar Derived from Elephant Dung. App. Envi. Res. [internet]. 2021 Jul. 9 [cited 2026 Oct. 6];43(3):34-4. available from: https://ph01.tci-thaijo.org/index.php/aer/article/view/242774