I. Saif Gedha, and N. Zaidun Abudi. 2024. “NO- 2, NO- 3 and PO-3 4 Removal Through Hydro-Char Derived from Hydrothermal Carbonization of Coconut Shells: A Review”. Journal of Environmental Engineering and Studies, May, 1-25. https://matjournals.net/engineering/index.php/JoEES/article/view/255.