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Received June 12, 2014
Accepted July 17, 2014
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Production of High-purity Magnetite Nanoparticles from a Low-grade Iron Ore via Solvent Extraction
1Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources, 124 Gwahang-no, Yuseong-gu, Daejeon 305-350, Korea 2Nanomaterials Science and Engineering, Korea University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 305-350, Korea 3Department of Environmental Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 609-735, Korea
kukcho@pusan.ac.kr
Korean Chemical Engineering Research, February 2015, 53(1), 39-45(7), 10.9713/kcer.2015.53.1.39 Epub 3 February 2015
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Abstract
We produced magnetite nanoparticles (MNPs) and a Mg-rich solution as a nano-adsorbent and a coagulant for water treatment, respectively, using a low-grade iron ore. The ore was leached with aqueous hydrochloric acid and its impurities were removed by solvent extraction of the leachate using tri-n-butyl phosphate as an extractant. The content of Si and Mg, which inhibit the formation of MNPs, was reduced from 10.3 wt% and 15.5 wt% to 28.1 mg/L and < 1.4 mg/L,_x000D_
respectively. Consequently, the Fe content increased from 68.6 wt% to 99.8 wt%. The high-purity Fe3+ solution recovered was used to prepare 5-15-nm MNPs by coprecipitation. The wastewater produced contained a large amount of Mg2+ and can be used to precipitate struvite in sewage treatment. This process helps reduce the cost of both sewage and iron-orewastewater_x000D_
treatments, as well as in the economic production of the nano-adsorbent.
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Rittmann BE, Mayer B, Westerhoff P, Edwards M, Chemosphere, 84(6), 846 (2011)
Ding M, De Jong B, Roosendaal S, Vredenberg A, Geochim. Cosmochim. Acta, 64(7), 1209 (2000)
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Zach-Maor A, Semiat R, Shemer H, J. Colloid Interface Sci., 363(2), 608 (2011)
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Shipley HJ, Yean S, Kan AT, Tomson MB, Environ. Toxicol. Chem., 28(3), 509 (2009)
Amin MM, Khodabakhshi A, Mozafari M, Bina B, Kheiri S, Environ. Eng. Manage. J., 9, 921 (2010)
Chowdhury SR, Yanful EK, J. Environ. Manage., 91, 2238 (2010)
Do TM, Suh YJ, Par. Aerosol Res., 9(4), 221 (2013)
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Nishihama S, Hirai T, Komasawa I, Ind. Eng. Chem. Res., 40(14), 3085 (2001)
Flett DS, J. Organomet. Chem., 690(10), 2426 (2005)
Massart R, IEEE Trans. Magn., 17(2), 1247 (1981)
Lu AH, Salabas EL, Schuth F, Angewandte Chemie - International Edition, 46(8), 1222 (2007)
Iwasaki T, Mizutani N, Watano S, Yanagida T, Kawai T, J. Exp. Nanosci., 5, 251 (2010)
Iler RK, The Chemistry of Silica, Wiley-Interscience, New York (1979)
Lee JK, Jeong SG, Koo SJ, Kim SY, Ju CS, Korean Chem. Eng. Res., 51(1), 53 (2013)
Harvianto GR, Jeong SG, Ju CS, Korean J. Chem. Eng., 31(5), 828 (2014)
Le Corre KS, Valsami-Jones E, Hobbs P, Parsons SA, Crit. Rev. Environ. Sci. Technol., 39(6), 433 (2009)
Parsons SA, Smith JA, Elements, 4(2), 109 (2008)
Shin HS, Lee SM, Environ. Technol., 19(3), 283 (1997)
Lee SI, Weon SY, Lee CW, Koopman B, Chemosphere, 51(4), 265 (2003)
Lahav O, Telzhensky M, Zewuhn A, Gendel Y, Gerth J, Calmano W, Birnhack L, Sep. Purif. Technol., 108, 103 (2013)
Telzhensky M, Birnhack L, Lehmann O, Windler E, Lahav O, Chem. Eng. J., 175, 136 (2011)
Quintana M, Sanchez E, Colmenarejo MF, Barrera J, Garcia G, Borja R, Chem. Eng. J., 111(1), 45 (2005)
