. "Modified Activated Carbons from Tea Waste for the Removal of Cu(II) and Pb(II) Ions Cu(II) & Pb(II) ions, Adsorption, Colloidal active carbon from tea waste, Isotherms, Kinetics and Thermodynamics.", Egyptian Journal of Chemistry, 58, 2, 2015, 183-202. doi: 10.21608/ejchem.2015.981