Investigation Sulphate removal of Synthetic Wastewater by iron oxide nanoparticles

Subject Areas : Environmental pollutions (water, soil and air)

hadis foladi ¹ (PhD candidate of environment, Department of Environment Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran.)
roya mafi gholami ² (Assistant Professor of Environmental, Department of Environment Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran.)
sadegh ghasemi ³ (PhD candidate of Water Resources Management, Young Researchers and Elite Club, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.)

Received: 2016-07-22 Accepted : 2017-01-04 Published : 2018-06-22

Keywords: Sulfate Removal, Magnetic iron oxide nanopartic, photocatalytic,

Abstract :

One of the serious issues in recent years, the role of sulfur and its various combinations like sulfate as part of pollutants in output waste. Given that today, the use of nano substances for treatment of environment pollutants is highly under attention. The purpose of this study is to use of magnetic iron oxide nanoparticles (Fe3O4) under UV irradiation for sulfate removal. The experiments were conducted in batch system and the effect of pH, the amount of nanoparticles, contact time and the initial concentration of sulfate under UV irradiation (8w) were examined. The most common isotherms and kinetics of adsorption were applied to analyze sulfate removal and the reaction rate. According to the results, the maximum efficiency of sulfate adsorption was 77.92% which was obtained in pH of 7 and contact time of 90 minutes and 2 g/L of nano substances. Data for this study indicated a good correspondence with isotherms of Longmire. The analysis of kinetic indicated that nitrate removal is consistent with the second-degree kinetic adsorption model. Finally, it should be noted that the process of photocatalytic magnetic iron oxide nanoparticles and ultraviolet (UV - C) could lead to a significant reduction in emissions of sulfate from sewage.

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