제목	M. Khan, B. Hussain, T. Jabbar, J. Ahn and W. Um. “A Comparative Study on the Separation of Radiostrontium (90 Sr) via Ion-exchange and Solvent Extraction Techniques”, Presented in the Korean Radioactive Waste Society meeting, Pyeongchang, Korea, May 07-09, 2014.
M. Khan, B. Hussain, T. Jabbar, J. Ahn and W. Um. “A Comparative Study on the Separation of Radiostrontium (90 Sr) via Ion-exchange and Solvent Extraction Techniques”, Presented in the Korean Radioactive Waste Society meeting, Pyeongchang, Korea, May 07-09, 2014.

번호	제목
19	W. Kim, S. Nam, W. Um, (2015) “Enhanced Chemical CRUD decontamination combined with electric process”, Presentation in WM Symposium 2015, Phoenix, USA, March 15-19, 2015.
18	H. Kim, S. Chang and W. Um, “Synthesis of Various Apatite and Application for Uranium Removal”, Presented in the annual meeting of Geological Society of America, Vancouver, Canada, October 19-22, 2014.
17	S. Chang, H. Kim and W. Um, “Determination of Selectivity Coefficients of Strontium under varying Ionic strength”, Presented at the annual meeting of Geological Society of America, Vancouver, Canada, October 19-22, 2014.
16	S. Nam, W. Kim, W. Um. “Development of chemical decontamination process for CRUD.” Presented in 12th Korean Radioactive Waste Society, Yeosu, Korea, October 16-17, 2014.
15	S. Choi, W, Kim and W. Um. “Transport Behavior of 238U and 99Tc for Repository Site Selection”, Presented in the Korean Radioactive Waste Society meeting, Yeosu, Korea, October 15-17, 2014.
14	M. Khan, J. Ahn, W. Um. “A Comparative Study on the Separation of Radiostrontium (90Sr) via Ion-exchange and Solvent Extraction Techniques”. Presented in Korea Radioactive waste society conference, Pyeongchang, Korea, August 05, 2014.
13	S. Han, W. Um and S. Choung. “Role of Natural Organic Matter on Radioactive Iodine Fate in Subsurface Environments” Presented in the Korean Radioactive Waste Society Conference, Pyeongchang, Korea, May 08-09, 2014.
	M. Khan, B. Hussain, T. Jabbar, J. Ahn and W. Um. “A Comparative Study on the Separation of Radiostrontium (90 Sr) via Ion-exchange and Solvent Extraction Techniques”, Presented in the Korean Radioactive Waste Society meeting, Pyeongchang, Korea, May 07-09, 2014.
11	S. Chang and W. Um, “Determination of Selectivity Coefficients of Strontium under varying Ionic strength”, Presented in the Korean Geological Society meeting, Busan, Korea, April 20-23, 2014.
10	S. Choung, W. Um, M. Kim, M. and M. Kim, “Effects of organic matter types on radioactive iodine sorption processes”, Presented in International Symposium and Asian Network on Soil and Groundwater Environment (Seoul, Korea), October 31-November 01, 2013.
9	M. Kim, S. Choung and W. Um. “Heat and Radiation Effects on Iodide Sorption by Surfactant Modified Bentonite (SMB)”, Presented in Korean Nuclear Society meeting (Kyungju, Korea), Oct 23-25, 2013.
8	M. Kim, S. Choung, and W. Um. “High sorptive bentonite for radioactive iodine removal in deep geological repository”, Presented in Korean Radioactive waste Society autumn meeting (Jeju, Korea), October 17-18, 2013.
7	S. Choung, W. Um, M. Kim, and M. Kim, “Sorption Mechanism of iodine species by black carbon”, Presented in Fall Meeting of the Korean Chemical Society (Changwon, Korea), October 16-18, 2013.
6	S. Choi, S. Choung, W. Um, J. Park and S. Kim. “Microbial activities for gas generation at Wolsung LILW repository”, Presented in Korean Radioactive waste Society spring meeting (Daegu, Korea), May 09-10, 2013.
5	S. Chang, S. Nam, S. Choung and W. Um, “Transport Behavior of 90Sr under the Effect of Seawater Intrusion”, Presented in the Korean Radioactive Waste Society meeting, Daegu, Korea, May 09-10, 2013.