Abstract
In this study, we focused on the performance of phosphate recovery in the case of magnetic iron oxide (MIO) particles and iron oxide nanotubes (INTs) with synthetic wastewater. MIO particles were prepared by a co-precipitation method, and INTs were prepared with a potentiostatic anodization method of zerovalent iron foil in electrolyte-containing sulfate and fluoride. Although MIO had the fast adsorption rate, INT had a higher adsorption capacity per surface area rather than MIO. The adsorption isotherm of MIO and INT was approximated by a Freundlich type. Phosphate adsorbed on MIO and INT was effectively desorbed with alkaline solutions. For phosphate recovery, MIO needs a magnetic recovery device, whereas, when INT was used for phosphate recovery, another recovery step is not necessary. Both methods showed effective adsorption performance for phosphate recovery in wastewater.
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Acknowledgments
This study was supported by the Korea Ministry of Environment (MOE) as Advanced Technology Program for Environmental Industry and was partially supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (NRF-2013R1A2A1A09007252).
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Choi, J., Chung, J., Lee, W. et al. Recovery of Phosphate by Magnetic Iron Oxide Particles and Iron Oxide Nanotubes in Water. Water Air Soil Pollut 227, 131 (2016). https://doi.org/10.1007/s11270-016-2781-7
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DOI: https://doi.org/10.1007/s11270-016-2781-7