C 14 /Fe 3 O 2 :

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... C14/Fe3O4@SiO2 C 14 /Fe 3 O 4 @SiO 2 - - Mehdi_farzadkia@yahoo.com () ( ) - - - - (// // ).. C 14 /Fe 3 O 4 @SiO 2 SEM. Fe 3 O 4 @SiO 2... FTIR FTIR SEM.. Fe 3 O 4 @SiO 2.. / C 14 /SiO 2 _Fe 3 O 4. C 14 /Fe 3 O 4 @SiO 2 :.[].[ ].[] 1 United States Environmental Protection Agency (USEPA) -.[]..[].. 36

... C14/Fe3O4@SiO2 - -- / ph... HNO 3 FTIR S4160. ICP. C 14 /SiO 2 _Fe 3 O 4 -- Fe 3 O 4 /.[]. : TEOS. Fe 3 O 4 @SiO 2. Fe 3 O 4 @SiO 2. ].[.... Fe 3 O 4 @SiO 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 22 11 Cintra 6 12 Perkinelmer Optima7300Dr 1 Coupling Agent 2 Vinyltriethoxysilane 3 Chlorodimethyl-n-Octadecylsilane 4 Aminopropyl Trimethoxysilane 5 Triethoxyoctylsilane 37

... C14/Fe3O4@SiO2 -- NaCl ph. / / /. -- Fe 3 O 4 @SiO 2. /.. -- ph ph.. /. /.. ICP - -- SEM FTIR. SEM.. -- Fe 3 O 4 @SiO 2.. ph ph ph ph [ ]. III.[ ].. sorption % = (C 0 -C e ) / C 0 *100 (). C e C 0 -- ph.. / /. --. / ph /. 38

... C14/Fe3O4@SiO2 () () () (cm -1 ) Fe 3 O 4 @SiO 2 FTIR - -. ].[ / pvalue C 14 /SiO 2 _Fe 3 O 4... C 14 H 32 O 3 Si Fe 3 O 4 @SiO 2 SEM - -. -. ( ) FTIR. ( )..[]..[] Fe_O_Fe --. C 14 /SiO 2 @Fe 3 O 4 39

... C14/Fe3O4@SiO2 --. / /. / pvalue.[] 6 7/02 10. ph=) - / ( / (). -- / /...[].[]...[].[] pvalue. 3/2 10 19. ph=) - ( / ph=) - ( / / 40

... C14/Fe3O4@SiO2. -- C 14 /SiO 2 _Fe 3 O 4. /... / / /.. α FeOOH.[] ph /.[]. CMK-5.[].[] NaCl / C 14 /SiO 2 _Fe 3 O 4. --... 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). Selective removal of dissolved uranium in drinking water by nanofiltration. J. of Water Research, 42 (4-5), 1160-1166. 2. 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), 3121-3129. 3. Domingo, J. L. (2001). Reproductive and developmental toxicity of natural and depleted uranium: A review. J. of Reproductive Toxicology, 15(6), 603-609. 4. 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), 162-166. 5. 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), 45-52. 6. 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), 2931-2942. 7. Tang, S. C. N., and Lo, I. M. C. (2013). Magnetic nanoparticles: Essential factors for sustainable environmental applications. Water Research, 47(0), 2613-2632. 42

... C14/Fe3O4@SiO2 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), 140-147. 9. Gao, M., Li, W., Dong, J., Zhang, Z., and Yang, B. (2011). Synthesis and characterization of superparamagnetic Fe3O4@ SiO2 core-shell composite nanoparticles. World J. of Condensed Matter Physics, 1, 49. 10. Ahangaran, F., Hassanzadeh, A., and Nouri, S. (2013). Surface modification of Fe 3 O 4 @ SiO 2 microsphere by silane coupling agent. International Nano Letters, 3(1), 1-5. 11. Sha, Y., Deng, C., and Liu, B. (2008). Development of C< sub> 18</sub>-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), 27-33. 12.Wang, J., Zheng, S., Shao, Y., Liu, J., Xu, Z., and Zhu, D.(2010). Amino-functionalized Fe 3 O 4 @ SiO 2 coreshell magnetic nanomaterial as a novel adsorbent for aqueous heavy metals removal. J. of Colloid and Interface Science, 349(1), 293-299. 13. 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), 119-124. 14. 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), 443-450. 15. 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), 632-637. 16. Yu, P., Wang, Q., Zhang, X., Zhang, X., Shen, S., and Wang, Y.(2010). Development of superparamagnetic high-magnetization C< sub> 18</sub>-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), 50-55. 17. 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), 393-398. 18. 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, 198-199(0), 412-419. 19. 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), 127-143. 20. 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), 861-868. 43

... C14/Fe3O4@SiO2 21. 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), 434-441. 22. 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), 662-670. 23. 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), 251-256. 24. 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), 77-85. 25. 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), 364-370. 26. Tan, Y., Chen, M., and Hao, Y. (2012). High efficient removal of Pb (II) by amino-functionalized Fe< sub> 3</sub> O< sub> 4</sub> magnetic nano-particles. Chemical Engineering, 191 (0), 104-111. 27. 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), 549-560. 28. 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< sup> 2+</sup> by various natural organic ligands from water and soil in Hong Kong. Chemosphere, 54(4), 507-514. 29. 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), 442-450. 30. Yusan, S., and Erenturk, S. (2011). Sorption behaviors of uranium (VI) ions on α-feooh. Desalination, 269(1-3), 58-66. 31. 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), 171-179. 32. 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), 109-114. 44