Drug overdose and poisoning are common clinical problems and could occur with propranolol
HCl . This investigation includes the study of adsorption of this drug on coal of
shell eggs which could serve as possible antidotes . The adsorption was studied at pH= 1 .
Adsorption isotherms have been analyzed by the Langmuir and Freundlich models. The
Freundlich isotherms have the highest correlation coefficients . The effect of temperature has been
studied on range ( 5 – 42 ˚C) the apparent thermodynamic parameters (ΔG , Δ H , Δ S) were calculated
and the obtained values support that the adsorption on the coal of shell eggs is exothermic .