Mohamad Sobri, N.A. and Harun, N. 2025. Mathematical Modelling of Rare Earth Elements Recovery by Ion Exchange Leaching from Ion Adsorption Clays. Journal of Chemical Engineering and Industrial Biotechnology. 11, 1 (Jul. 2025), 41–58. DOI:https://doi.org/10.15282/jceib.v11i1.12401.