The investigation of the effectiveness of the removal of copper, nickel, chromium and zinc ions from
synthetic waste water by using Moringa aptera Gaertn (MAG) was studied. The effect of biosorption
experimental parameters such as initial metal concentration, contact time, temperature and adsorbent
dose has been presented and discussed in details. The equilibrium data for biosorption were analysed by
using Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherm models to define the best
correlation for each metal.