The Effect of Phosphorus and Nitrogen Biofertilizers inoculation on the oily Sunflower to Adsorption of Pb (II) from Aqueous Solutions

The effect of phosphorus and nitrogen biofertilizers inoculation on oily sunflower (var: iroflor) was studied for adsorption of Pb (II) from aqueous solutions. We used different types of phosphorus and nitrogen solubilizing bacteria as biological fertilizers. After inoculation of treated samples, we observed that the maximum adsorption was obtained by blank treatment in cases where no fertilizer was added to it (a4b4). So iroflor was applied as a biosorbent for Pb (II) adsorption. The effects of varying parameters such as: temperature, initial metal concentration, pH, and contact time on the adsorption process were determined. Adsorption equilibrium was established in 120 min and the maximum adsorption of Pb (II) on the biosorbent was observed to occur at a pH of 8.0. The Langmuir isotherm showed the best fit to the equilibrium data. The equilibrium parameter, RL, indicated that this biosorbent is useful for Pb removal from aqueous solutions. The thermodynamic parameters were calculated which showed an exothermic adsorption process.