Simulation of chromium, nickel and lead removal from aqueous environment using polypyrrol and its composites
Subject Areas : Journal of Simulation and Analysis of Novel Technologies in Mechanical EngineeringArash Shabani 1 , Majid Riahi Samani 2 , Davood Toghraie 3
1 - 1Department of Civil Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Isfahan,Iran
2 - 1Department of Civil Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Isfahan,Iran
3 - 2Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr , Isfahan, Iran
Keywords: Heavy metals, Removal simulation, Polypyrrol, Composite, Aqueous environment,
Abstract :
In the present study, removal of chromium, lead and nickel by using polypyrrol and its composites from the aqueous environment were simulated. In order to prepare polypyrrol and its composites, iron chloride oxidant with 8 g, water solvents, acetonitrile and ethyl acetate were used in the presence of two additives, polyvinyl alcohol and polyethylene glycol at concentrations of 1.5 and 2. Batch quarantine method was used to measure the removal of these metals from the aqueous environment. The simulated results showed that all polypyrrols and their composites are suitable for the removal of +6 chromium. The highest adsorption of total chromium and +6 chromium was observed by polypyrrol and polyethylene glycol composites with 90.7% and 96.2%, respectively. However, polypyrrol and its composites are undesirable for removal of lead, cadmium and nickel. The highest removal rates of lead and cadmium by activated carbon powder were 99.5% and 78.08%, respectively. Also, the percentage of nickel removal by some polypyrrols was lower than activated carbon with 14.96% removal. Some polypyrrols also have a higher percentage of knockout than activated carbon, which does not seem very high in comparison with other heavy metals. In general, it can be found that the use of polypyrrol composites, especially polypyrrol and polyethylene glycol composites, are suitable for the removal of total chromium and +6 chromium from the aqueous environment, but are undesirable for the removal of lead and nickel.
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