INVESTIGATION OF REMOVAL AMOUNT OF HEAVY METALS CADMIUM AND LEAD FROM AQUEOUS SOLUTION BY PSEUDOMONAS AERUGINOSA BACTERIA

Background and Aim:Pollution of water resources by these heavy metals is one of the global environmental concerns which habeen increased due to activities such as industrialization and urbanization. Heavy metals’ Ions are very dangerous for health and environment. Today, using low cost methods for removing metals has attracted attention significantly and searching for such methods are highly recommended due to economic and technical limitations.Methods:. In order to assess the effect of operational parameters on absorption of Lead and Cadmium and process modeling, five main factors were studied as follows: living and non-living cell mass (mg), amount of Lead and Cadmium (mg/L), process temperature (°C), pH and time of reaction (min). Finally, based on these factors, test were designed in Minitab 15 software.Results:Maximum efficiency of removing Lead and Cadmium was achieved in following conditions: time duration: 60 hours, pH=7, living mass cell of Pseudomonas aeruginosa= 9 (gr), concentration of Lead and Cadmium 1(mg/L) and 20(mg/L) were 95.13 and 89.8 respectively.Conclusion:results show that both Pseudomonas aeruginosa bacteria have high ability in removing Lead and Cadmium in aqueous environment. This method is cost effective and environment-friendly

کلیدواژه ها:

biosorption ، bioaccumulation ، Lead ، Cadmium ، Pseudomonas Aeruginosa bacteria