JWARP  Vol.6 No.4 , March 2014
Preparation of Iron Ferrocyanide-Supported Nanofiber Membrane for Purification of Cesium-Contaminated Water
ABSTRACT

The earthquake in northeastern Japan that occurred on March 11, 2011 brought about the nuclear accident, resulting in the detection of radioactive cesium in soil and water over a wide region around Fukusihma. In this study, with the aim of the establishment of an effective method for removing cesium from water contaminated with cesium, the functionalized membrane with large cesium adsorption capacity per unit mass was prepared by combining nanofibers having a large specific surface area with iron ferrocyanide having a high selectivity for cesium adsorption. The nanofiber membrane made of polyacrylonitrile (PAN) was used as a base material of the functionalized membrane. Nanofiber membranes were immersed in the dispersions of iron ferrocyanide with various concentrations and pH values. After taking it out, it was dried at various temperatures and then non-immobilized iron ferrocyanide was completely removed through cleaning. As a result of the evaluation of completed affinity membranes, the amount of iron ferrocyanide immobilized by the nanofiber membrane increased significantly with the increase in the iron ferrocyanide concentration but subsequently showed a tendency to decrease rapidly, resulting in a distinct maximum at the iron ferrocyanide concentration of 3 wt%. And, the supported amount of iron ferrocyanide to the nanofiber membrane increased as pH became lower. Moreover, it was found that as high temperature as possible without exceeding the glass transition temperature of PAN was optimal as a drying temperature of prepared affinity membrane.


Cite this paper
Mukai, Y. and Mizuno, A. (2014) Preparation of Iron Ferrocyanide-Supported Nanofiber Membrane for Purification of Cesium-Contaminated Water. Journal of Water Resource and Protection, 6, 249-255. doi: 10.4236/jwarp.2014.64030.
References
[1]   Saito, K. (2012) Countermeasures against Radioactive Substances Following the Great East Japan Earthquake. NTS Inc., Tokyo.

[2]   Yoshino, K. (2013) Prussian Blue: New Applications and Its Nanoparticles. The Chemical Times, 229, 23-27.

[3]   Hongu, T. (2006) Nanofiber Technology. Nikkan Kogyo Shinbun Ltd., Tokyo.

[4]   Ma, Z.W., Kotaki, M. and Ramakrishna, S. (2005) Electrospun Cellulose Nanofiber as Affinity Membrane. Journal of Membrane Science, 265, 115-123. http://dx.doi.org/10.1016/j.memsci.2005.04.044

[5]   Teng, M., Li, F., Zhang, B. and Taha, A.A. (2011) Electrospun Cyclodextrin-Functionalized Mesoporous Polyvinyl Alcohol/SiO2 Nanofiber Membranes as a Highly Efficient Adsorbent for Indigo Carmine Dye. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 385, 229-234. http://dx.doi.org/10.1016/j.colsurfa.2011.06.020

[6]   Li, X., Zhang, C., Zhao, R., Lu, X., Xu, X., Jia, X., Wang, C. and Li, L. (2013) Efficient Adsorption of Gold Ions from Aqueous Systems with Thioamide-Group Chelating Nanofiber Membranes. Chemical Engineering Journal, 229, 420-428. http://dx.doi.org/10.1016/j.cej.2013.06.022

[7]   Mukai, Y. (2011) Preliminary Study to Apply Nanofiber Nonwoven Cloth as Filter Media for Water Treatment. Nanofiber, 2, 20-25.

[8]   Yoon, K., Hsiao, B.S. and Chu, B. (2008) Functional Nanofibers for Environmental Applications. Journal of Materials Chemistry, 18, 5326-5334. http://dx.doi.org/10.1039/b804128h

[9]   Feng, C., Khulbe, K.C., Matsuura, T., Tabe, S. and Ismail, A.F. (2013) Preparation and Characterization of Electrospun Nanofiber Membranes and Their Possible Applications in Water Treatment. Separation and Purification Technology, 102, 118-135. http://dx.doi.org/10.1016/j.seppur.2012.09.037

[10]   Hiraoka, H. and Kamiya, D. (2013) Cesium Adsorbent Using Iron Ferrocyanide. Annual Research Report of Toagosei “TREND”, 16, 31-36.

 
 
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