This structure has high adsorption capacity and can be easily recovered and reused.
Heavy metals, including lead, copper, cadmium, chrome, zinc and nickel are the most common metal pollutants that are found in industrial wastewater. These metals are toxic to humans and other living creatures even at low concentrations, and it is necessary to eliminate them from the wastewater before being released in the environment.
Adsorption is one of the simplest and most economic separation methods, which can be used in the elimination of pollutants such as chrome from the wastewater. Although active carbon is the most common used sorbent to adsorb chrome, researchers try to find other sorbents with high sorption capacity and ease of recovery due to the difficult and expensive recovery of active carbon. Iron is one of the most available elements on earth, which can be used as an ideal option for the elimination of pollutants.
The present research studied the elimination of chrome and reduction of oxygen required for the oxidation of the wastewater of an Iranian petrochemical unit by using zero capacity iron and iron oxide nanoparticles, and it compared the results.
The results showed that zero capacity iron nanoparticles can be used as an effective agent in the elimination of chrome existing in petroleum wastewater. The efficiency of the purification increases as the amount of zero capacity iron nanoparticles and the time of the application of ultrasonic waves increase.
Results of the research have been published in Journal of Applied Environmental and Biological Sciences, vol. 5, issue 6, 2015, pp. 31-39.
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