Elsherif, K. M., Haider, I., & El-Hashani, A. (2018). ADSORPTION OF Co (II) IONS FROM AQUEOUS SOLUTION ONTO TEA AND COFFEE POWDER: EQUILIBRIUM AND KINETIC STUDIES. Journal of Fundamental and Applied Sciences, 11(1), 65–81. https://doi.org/10.4314/jfas.v11i1.5