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http://dx.doi.org/10.11001/jksww.2016.30.4.409

Effects of alkali species and concentration on the size distribution of the co-precipitated magnetite particles used for phosphate adsorption  

Lee, Minhyeong (Department of Environmental Engineering, Daegu university)
Doliente, Jonica Ella (Department of Environmental Engineering, Daegu university)
Nam, Haiuk (POSCO E&C)
Kim, Yunjung (POSCO E&C)
Choi, Younggyun (Department of Environmental Engineering, Daegu university)
Publication Information
Journal of Korean Society of Water and Wastewater / v.30, no.4, 2016 , pp. 409-415 More about this Journal
Abstract
Magnetite particles were synthesized by co-precipitation of water-soluble 밀 스케일-derived precursor by various concentrations of (0.5, 0.67, 1, 2 N) NaOH and (0.6, 0.8, 1.2, 2.4 N) $NH_4OH$. It is theoretically known that as the concentration of the alkaline additive used in iron oxide synthesis increases, the particle size distribution of that iron oxide decreases. This trend was observed in both kind of alkaline additive used, NaOH and $NH_4OH$. In addition, the magnetite synthesized in NaOH showed a relatively smaller particle size distribution than magnetite synthesized in $NH_4OH$. Crystalline phase of the synthesized magnetite were determined by X-ray diffraction spectroscopy(XRD). The particles were then used as an adsorbent for phosphate(P) removal. Phosphorus adsorption was found to be more efficient in NaOH-based synthesized magnetite than the $NH_4OH$-based magnetite.
Keywords
Alkali treatment; co-precipitation; magnetite; particle size; phosphate adsorption;
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Times Cited By KSCI : 3  (Citation Analysis)
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