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Τέρις Κοντόσταυλος
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1 ... C 14 /Fe 3 O Mehdi_farzadkia@yahoo.com () ( ) (// // ).. C 14 /Fe 3 O 2 SEM. Fe 3 O 2... FTIR FTIR SEM.. Fe 3 O 2.. / C 14 /SiO 2 _Fe 3 O 4. C 14 /Fe 3 O 2 :.[].[ ].[] 1 United States Environmental Protection Agency (USEPA) -.[]..[].. 36

2 / ph... HNO 3 FTIR S4160. ICP. C 14 /SiO 2 _Fe 3 O 4 -- Fe 3 O 4 /.[]. : TEOS. Fe 3 O 2. Fe 3 O 2. ].[.... Fe 3 O 2...[].[] [].[ ].[] --.[ ] N CS NH CO Ph.[] C 7 H 7 ON.[]. 6 Merck 7 Scanning Electron Microscopy (SEM) 8 Hitachi 9 Fourier Transform Infrared (FTIR) 10 Bruker Vector Cintra 6 12 Perkinelmer Optima7300Dr 1 Coupling Agent 2 Vinyltriethoxysilane 3 Chlorodimethyl-n-Octadecylsilane 4 Aminopropyl Trimethoxysilane 5 Triethoxyoctylsilane 37

3 NaCl ph. / / /. -- Fe 3 O 2. /.. -- ph ph.. /. /.. ICP - -- SEM FTIR. SEM.. -- Fe 3 O 2.. ph ph ph ph [ ]. III.[ ].. sorption % = (C 0 -C e ) / C 0 *100 (). C e C 0 -- ph.. / /. --. / ph /. 38

4 ... () () () (cm -1 ) Fe 3 O 2 FTIR - -. ].[ / pvalue C 14 /SiO 2 _Fe 3 O 4... C 14 H 32 O 3 Si Fe 3 O 2 SEM ( ) FTIR. ( )..[]..[] Fe_O_Fe --. C 14 /SiO 3 O 4 39

5 / /. / pvalue.[] 6 7/ ph=) - / ( / (). -- / /...[].[]...[].[] pvalue. 3/ ph=) - ( / ph=) - ( / / 40

6 C 14 /SiO 2 _Fe 3 O 4. /... / / /.. α FeOOH.[] ph /.[]. CMK-5.[].[] NaCl / C 14 /SiO 2 _Fe 3 O C 14 /SiO 2 _Fe 3 O 4. ph=) - / ( / 41

... C14/Fe3O4@SiO2 - SiO 2 @Fe 3 O 4... - " (VI) /.. ) (.[] ph=) - ( / - 1. Favre-Réguillon, A., Lebuzit, G., Murat, D., Foos, J., Mansour, C., and Draye, M. (2008).

7 ... - SiO 3 O " (VI) /.. ) (.[] ph=) - ( / - 1. Favre-Réguillon, A., Lebuzit, G., Murat, D., Foos, J., Mansour, C., and Draye, M. (2008). Selective removal of dissolved uranium in drinking water by nanofiltration. J. of Water Research, 42 (4-5), Ozay, O., Ekici, S., Aktas, N., and Sahiner, N. (2011). P (4-vinyl pyridine) hydrogel use for the removal of and Th 4+ from aqueous environments. J. of Environmental Management, 92(12), Domingo, J. L. (2001). Reproductive and developmental toxicity of natural and depleted uranium: A review. J. of Reproductive Toxicology, 15(6), Shuibo, X., Chun, Z., Xinghuo, Z., Jing, Y., Xiaojian, Z., and Jingsong, W.(2009). Removal of uranium (VI) from aqueous solution by adsorption of hematite. J. of Environmental Radioactivity, 100(2), Zong, P., Wang, S., Zhao, Y., Wang, H., Pan, H., and He, C. (2013). Synthesis and application of magnetic graphene/iron oxides composite for the removal of U(VI) from aqueous solutions. J. of Chemical Engineering, 220(0), Crane, R. A., Dickinson, M., Popescu, I. C., and Scott, T. B.(2011). Magnetite and zero-valent iron nanoparticles for the remediation of uranium contaminated environmental water. J. of Water Research, 45(9), Tang, S. C. N., and Lo, I. M. C. (2013). Magnetic nanoparticles: Essential factors for sustainable environmental applications. Water Research, 47(0),

8 Zhao, X., Shi, Y., Wang, T., Cai, Y., and Jiang, G. (2008). Preparation of silica-magnetite nanoparticle mixed hemimicelle sorbents for extraction of several typical phenolic compounds from environmental water samples. J. of Chromatography A, 1188(2), Gao, M., Li, W., Dong, J., Zhang, Z., and Yang, B. (2011). Synthesis and characterization of superparamagnetic SiO2 core-shell composite nanoparticles. World J. of Condensed Matter Physics, 1, Ahangaran, F., Hassanzadeh, A., and Nouri, S. (2013). Surface modification of Fe 3 O SiO 2 microsphere by silane coupling agent. International Nano Letters, 3(1), Sha, Y., Deng, C., and Liu, B. (2008). Development of C 18-functionalized magnetic silica nanoparticles as sample preparation technique for the determination of ergosterol in cigarettes by microwaveassisted derivatization and gas chromatography/mass spectrometry. J. of Chromatography A, 1198(0), Wang, J., Zheng, S., Shao, Y., Liu, J., Xu, Z., and Zhu, D.(2010). Amino-functionalized Fe 3 O SiO 2 coreshell magnetic nanomaterial as a novel adsorbent for aqueous heavy metals removal. J. of Colloid and Interface Science, 349(1), Zhao, Y., Liu, C., Feng, M., Chen, Z., Li, S., Tian, G., Wang, L., Huang, J., and Li, S. (2010). Solid phase extraction of uranium(vi) onto benzoylthiourea-anchored activated carbon. J. of Hazardous Materials, 176(1-3), Venkatesan, K., Sukumaran, V., Antony, M., and Vasudeva Rao, P. (2004). Extraction of uranium by amine, amide and benzamide grafted covalently on silica gel. J. of Radioanalytical and Nuclear Chemistry, 260(3), Wei, Y., Han, B., Hu, X., Lin, Y., Wang, X., and Deng, X. (2012). Synthesis of Fe 3 O 4 nanoparticles and their magnetic properties. Procedia Engineering, 27(0), Yu, P., Wang, Q., Zhang, X., Zhang, X., Shen, S., and Wang, Y.(2010). Development of superparamagnetic high-magnetization C 18-functionalized magnetic silica nanoparticles as sorbents for enrichment and determination of methylprednisolone in rat plasma by high performance liquid chromatography. Analytica Chimica Acta, 678(1), Camacho, L. M., Deng, S., and Parra, R. R. (2010). Uranium removal from groundwater by natural clinoptilolite zeolite: Effects of ph and initial feed concentration. J. of Hazardous Materials, 175(1-3), Zhang, X., Jiao, C., Wang, J., Liu, Q., Li, R., Yang, P., and Zhang, M.(2012). Removal of uranium(vi) from aqueous solutions by magnetic Schiff base: Kinetic and thermodynamic investigation. Chemical Engineering, (0), Han, R., Zou, W., Wang, Y., and Zhu, L.(2007). Removal of uranium(vi) from aqueous solutions by manganese oxide coated zeolite: Discussion of adsorption isotherms and ph effect. J. of Environmental Radioactivity, 93(3), Sadeghi, S., and Sheikhzadeh, E. (2009). Solid phase extraction using silica gel modified with murexide for preconcentration of uranium (VI) ions from water samples. J. of Hazardous Materials, 163(2-3),

9 Mellah, A., Chegrouche, S., and Barkat, M. (2006). The removal of uranium(vi) from aqueous solutions onto activated carbon: Kinetic and thermodynamic investigations. J. of Colloid and Interface Science, 296(2), Majdan, M., Pikus, S., Gajowiak, A., Sternik, D., and Zięba, E. (2010). Uranium sorption on bentonite modified by octadecyltrimethylammonium bromide. J. of Hazardous Materials, 184(1-3), Jiang, H.-M., Yan, Z.-P., Zhao, Y., Hu, X., and Lian, H.-Z. (2012). Zincon-immobilized silica-coated magnetic Fe3O4 nanoparticles for solid-phase extraction and determination of trace lead in natural and drinking waters by graphite furnace atomic absorption spectrometry. Talanta, 94(0), Argun, M. E., Dursun, S., Ozdemir, C., and Karatas, M. (2007). Heavy metal adsorption by modified oak sawdust: Thermodynamics and kinetics. J. of Hazardous Materials, 141(1), Veena Devi, B., Jahaghirdar, A.A., and Zulfiqar Ahmed, M.N. (2012). Adsorption of chromium on activated carbon prepared from coconut shell. International J. of Engineering Research and Applications, 2(5), Tan, Y., Chen, M., and Hao, Y. (2012). High efficient removal of Pb (II) by amino-functionalized Fe 3 O 4 magnetic nano-particles. Chemical Engineering, 191 (0), Anirudhan, T. S., Divya, L., and Suchithra, P. S. (2009). Kinetic and equilibrium characterization of uranium(vi) adsorption onto carboxylate-functionalized poly(hydroxyethylmethacrylate)-grafted lignocellulosics. J. of Environmental Management, 90(1), Cao, J., Lam, K., Dawson, R., Liu, W., and Tao, S.(2004). The effect of ph, ion strength and reactant content on the complexation of Cu 2+ by various natural organic ligands from water and soil in Hong Kong. Chemosphere, 54(4), Tian, G., Geng, J., Jin, Y., Wang, C., Li, S., Chen, Z., Wang, H., Zhao, Y., and Li, S. (2011). Sorption of uranium(vi) using oxime-grafted ordered mesoporous carbon CMK-5. J.of Hazardous Materials, 190(1-3), Yusan, S., and Erenturk, S. (2011). Sorption behaviors of uranium (VI) ions on α-feooh. Desalination, 269(1-3), Dickinson, M., and Scott, T. B. (2010). The application of zero-valent iron nanoparticles for the remediation of a uranium-contaminated waste effluent. J. of Hazardous Materials, 178(1-3), Merdivan, M., Seyhan, S., and Gok, C. (2006). Use of benzoylthiourea immobilized on silica gel for separation and preconcentration of uranium (VI). Microchimica Acta, 154(1-2),

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