OMALE, A.; EKERE, N. R.; OMALE, J. A.; IHEDIOHA, J. N.; EGU, S. A. UPTAKE OF Co(II), Pb(II) AND Ni(II) IONS BY Annona senegalensis STEM BARK BIOCHAR FROM AQUEOUS SOLUTION: OPTIMIZATION, KINETIC AND THERMODYNAMIC STUDIES. FUDMA JOURNAL OF SCIENCES, v. 8, n. 2, p. 59 - 72, 30 Apr. 2024.