Investigation of Lead Removal Process from Leachates around Tehran

Nowadays, increasing public concern have challenged the environmental problem associated with wastewater. Indeed, the removal of contaminates from wastewater is still far away from a satisfactory solution. Different processes are used for the treatment of wastewater. However, adsorption on activated carbon can be an environmentally friendly and economically sound process. In this study, olive-waste activated carbon as was employed as a novel adsorbent for efficient removal of lead (heavy metals). In the removal process the variables; pH, concentration of lead, amount of adsorbent and contact time, were studied on their influence on removal of lead, using one at a time approach, in a batch procedure on removal of lead which used 109 mg/g. Following the investigation of concentration effect, fitting the experimental equilibrium data to numerous conventional isotherm models showed that the Langmuir model with high correlation coefficient and low error analysis (R2=0.998) is more usable to explain the experimental data. The kinetic models were studied and parameters of this model was calculated. First order kinetics was predicted for adsorption with 0.99 error tolerance.