UPTAKE OF Co(II), Pb(II) AND Ni(II) IONS BY Annona senegalensis STEM BARK BIOCHAR FROM AQUEOUS SOLUTION: OPTIMIZATION, KINETIC AND THERMODYNAMIC STUDIES. FJS [Internet]. 2024 Apr. 30 [cited 2025 Sep. 4];8(2):59-72. Available from: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/2341