Lead removal from battery industry synthetic wastewater by nano maghemite

Lead is one of the priority toxic pollutants from industrial wastewater, such as batteries, paint, weapons, glass, printing, etc. In this study, was investigated magnetic iron oxide nanoparticles maghemite for the removal of lead from synthetic wastewater of battery industry. In this study was used the influence of various factors such as pH, initial concentration of lead, and contact time on lead removal from synthetic wastewater by nanoparticles maghemite was investigated. After separating adsorbent by magnetic field, remaining lead concentration was measured by atomic adsorption (perkin elmer 2380). The results were analyzed by the software SPSS Version 18. Results showed that in the pH value of 7, the initial concentration of lead of 50 mg/L and 0.1 g. per liter Nano maghemite dose and contact time of 40 min and stirring speed of 150 rpm 63.91 percent lead removal was obtained. Adsorption capacity was 61mg/g. Maghemite nanoparticles had high adsorption capacity, rapid and effective. Removal efficiency of lead was directly related to pH and time and reversely to initial concentration of lead. The absorption model was fitt well to Freundlich isotherm.