tThe removal of heavy metals from aqueous effluents so as to avoid their toxic, bioaccu-mulation and biomagnification effects to humans and environment is usually realized bymeans of physical, chemical treatment, and biological processes. The aim of this study isto evaluate the potential of rapeseed waste from biodiesel production as a biosorbent forZn(II) ions.The ability of the rapeseed waste for Zn(II) biosorption exhibited a maximum at pH 4.5–5.The removal efficiency of Zn(II) from solution with an initial concentration of 72 mg L−1var-ied from 39% to 89% for an increase of the rapeseed waste dose from 2 to 30 g L−1. The amountof Zn(II) retained on the tested rapeseed increased with increasing metal ion concentration,but the Zn(II) sorption percentage decreased. The equilibrium data are fitted to the Lang-muir isotherm better than to the Freundlich isotherm. The kinetics of Zn(II) biosorptionprocess follows a pseudo-second order model. The thermal stability of the rapeseed beforeand after Zn(II) biosorption was studied by thermogravimetric analysis. It was found that thezinc loaded rapeseed exhibits a better initial thermal stability than the original rapeseed,presumably due to the cross linking generated by the intermolecular complexation of Zn(II)ions. In both cases, the thermal decomposition takes place according to some reassemblingkinetic models, in two phases with order n reactions. The results of this study strongly sug-gest the possibility to use rapeseed as an effective biosorbent for Zn(II) ions removal fromaqueous effluents (municipal/industrial wastewaters).