Browse > Article

Electrosorption of U(VI) by Surface-Modified Activated Carbon Fiber  

Lee, Yu Ri (Department of Chemical Engineering, Chungnam National University)
Jung, Chong Hun (Korea Atomic Energy Research Institute)
Ryu, Seung Kon (Department of Chemical Engineering, Chungnam National University)
Oh, Won Zin (Korea Atomic Energy Research Institute)
Publication Information
Korean Chemical Engineering Research / v.43, no.1, 2005 , pp. 60-65 More about this Journal
Abstract
The electrosorption of U(VI) from waste water was carried out by using activated carbon fiber(ACF) felt electrode in a continuous electrosorption cell. In order to enhance the electrosorption capacity at lower potential, ACF felt was chemically modified in acidic, basic and neutral solution. Pore structure and functional groups of chemically modified ACF were examined, and the effect of treatment conditions was studied for the adsorption of U(VI). Specific surface area of all ACFs decreases by this treatment. The amount of acidic functional groups decreases with basic and neutral salt treatment, while the amount increases a lot with acidic treatment. The electrosorption capacity of U(VI) decreases on using the acid treated electrode due to the shielding effect of acidic functional groups. Base treated electrode enhances the capacity due to the reduction of acidic functional groups. The electrosorption amount of U(VI) on the base treated electrode at -0.3 V corresponds to that of ACF electrode at -0.9 V. Such a good adsorption capacity was not only due to the reduction of shielding effect but also the increase of $OH^-$ in the electric double layer on ACF surface by the application of negative potential.
Keywords
Electrosorption; Activated Carbon Fiber; Uranium Ion(VI); Surface Modification; Electric Double Layer;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Oren, Y. and Soffer, A., 'Graphite Felts as an Efficient Porous Electrode for Impurity Removal and Recovery of Metals,' Electrochemica Acta., 28, 1649-1654(1983)   DOI   ScienceOn
2 Ryu, S. K., 'Porosity of Activated Carbon Fiber,' High Temperature-High Presure, 22, 345-354(1990)
3 Shim, J. W., Park, S. J. and Ryu, S. K., 'Effect of Modification with $HNO_3$ and NaOH on Metal Adsorption by Pitch-Based Activated Carbon Fibers,' Carbon, 39, 1635-1642(2001)   DOI   ScienceOn
4 Jr. Pittman, C. U., He, G. R., Wu, B. and Garner, S. D., 'Chemical Modification of Carbon Fiber Surfaces by Nitric Acid Oxidation Followed by Reaction with Tetraethylenepentamine', Carbon, 35, 317-331(1997)   DOI   ScienceOn
5 Brunauer, S., Emmett, P. H. and Tellet, E., 'Adsorption of Gases in Multimolecular Layers,' J. Am. Chem. Soc., 60, 309(1938)   DOI
6 Jayson, G. G., Sangster, J. A., Thompson, G. and Wilkinson, M. C., 'Adsorption an Electrosorption of Mercury(II) Acetate onto Activated Charcoal Cloth from Aqueous Solution,' Carbon, 25, 523-531(1987)   DOI   ScienceOn
7 Hong, L. I., Moshonov, A. and Muzzy, J. D., 'Electrochemical Polymerization of Xylene Derivatives on Carbon Fiber,' Polym. Compos., 12, 191-201(1991)   DOI
8 Park, S. J., Park, B. J. and Ryu, S. K., 'Electrochemical Treatment on Activated Carbon Fibers for Increasing the Amount and Rate of Cr(VI) Adsorption,' Carbon, 37, 1223-1226(1999)   DOI   ScienceOn
9 Oren, Y. and Soffer, A., 'Water Desalting by Means Of Electrochemical Parametric Pumping,' J. Applied Electrochemistry, 13, 473-484(1983)   DOI
10 Kim, H. S., Ryu, S. K., Jung, C. H. and Park, K. K., 'Electrosorption of Cobalts Ions by Chemically Treated ACF Discs,' HWAHAK KONGHAK, 41(6), 744-748(2003)
11 Marsh, H., Heintz, E. A. and Rodriguez-Reinoso, F., 'Introduction to Carbon Technologies,' University of Alicante, 42-45(1997)
12 Drzal, L. T. and Madhukar, M., 'Fibre-Matrix Adhesion and its Relationship to Composite Mechanical Properties,' J. Mater. Sci., 28, 569(1993)   DOI
13 Park, S. J., Interfacial forces and field: theory and application, 1st ed, J. P. Hsu, Marcel Dekker, New York(1999)
14 Carley-Macauy, K. W. and Gutman, R. G., Radioactive Waste: Advanced management methods for Medium Active Liquid Waste, Harwood Academic Pub(1981)
15 Boehm, H. P., 'Chemisty of Heteroatoms on the Surface of Carbon(Plenary Lecure)', Carbon, 7, 715(1969)
16 Jung, C. H., 'A Study on the Preparation of Activated Carbon Fibers and Their Radioactive Co(II) Adsorption Characteristics,' Ph.D. Dissertation, ChungnamNational Univ., Deajeon, Korea (1994)
17 Woodard, F. E., McMackins, D. E. and Jansson, R. E. W., 'Electrosorption of Organic on Three Dimensional Carbon Fiber Electrode,' J. Electroanal. Chem., 214, 303-330(1986)   DOI   ScienceOn
18 Park, S. J., Kim, Y. M. and Shin, J. S., 'Studies on Anodic Oxidation Treatment of Surface and Heavy Metal Adsorption Properties of Activated Carbon Fibers,' J. Korean Ind. Eng. Chem., 14, 41-47(2003)
19 Takamura, T., Awano, H., Ura, T. and Ikezawa, Y., 'Effective Surface Treatment to Improve the Li Doping and Undoping Characteristics of Carbon Fiber as a Li Secondary Battery Anode,' 36th Battery Symposium, Japan, 92-92(1995)