| 4 | S. Choung, M. Kim and W. Um, ¡°Adsorption behavior of black carbon for radioactive iodine species in subsurface environments¡±, Presented in Fall Meeting of American Geophysical Union, San Francisco, California, December 03-07, 2012. | 
						
				| 3 | J. Choi, Syazwani Mohd Fdzil and W. Um. ¡°Weathering effects on technetium leaachability from ceramicrete waste form¡±, Presented in Korean Nuclear Society spring meeting (Jeju, Korea), May 17-18, 2012. | 
						
				| 2 | M. Kim, S. Chang, S. Choung and W. Um. ¡°Sorption behavior of radionuclide iodine on organic and inorganic sorbents¡±, Presented in Korean Nuclear Society Spring Meeting (Jeju, Korea), May 17-18, 2012. | 
						
				| 1 | S. Choung, and W. Um, ¡°Radioactive iodine interaction with natural organic matter (NOM)¡±, Presented in the Korean Society of Economic and Environmental Geology Spring Meeting (Daemyung Seorak Resort, Korea), April 18–20, 2012,. |