Abdul-Aziz Y, Hassan Z. Synthesis Eco-friendly Biochar from Spent Coffee for Using to Remove Acidic and Basic Dyes from Aqueous Media. NJES [Internet]. 2026 Jul. 26 [cited 2026 Jul. 29];29(2):353-6. Available from: http://old.nahje.com/index.php/main/article/view/1254