HYBRID EVENT: You can participate in person at Valencia, Spain or Virtually from your home or work.
Changhyun Roh, Speaker at Speaker for Catalysis Conference- Changhyun Roh
Korea Atomic Energy Research Institute, Korea, Republic of
Title : Overview of radioactive cesium removal from nuclear wastes


After the Fukushima Daiichi Nuclear Power Plant disaster in Japan in 2011, the demand drastically increased for efficient technology for the removal of radioactive cesium. Many researchers have suggested using physical adsorption methods to remove radioactive cesium from contaminated water. For example, polymers, nanocomposites, and clay have all previously been investigated for their capacity to remove radioactive cesium through the interaction between the negatively charged surfaces of naturally occurring adsorbents and the positive charge of radioactive cesium. However, powder-type adsorbents cannot be used to treat contaminated water in a real, open environment because there is no easy way to collect the adsorbents after they are used. In particular, adsorbents can cause blocking phenomena, which could be addressed by encapsulating the adsorbents with suitable modification that could alleviate the clogging and resolve the post-treatment separation problem. Therefore, novel solid absorbents are needed to allow easy separation of the materials from the contaminant environment to prevent secondary contamination. In this talk, I will overview the adsorbents for the efficient removal of cesium from nuclear wastes.


Changhyun Roh received his Ph.D degree at the Department of Chemical and Biological Engineering, Seoul National University, Seoul, Republic of Korea in 2007. Now he is Senior Researcher/Associate Professor at Korea Atomic Energy Research Institute/University of Science and Technology, Republic of Korea. His current research interests include functional materials, environmental science, nanotechnology, biotechnology and interdisciplinary research. He has published more than 70 research articles in SCI(E) journals. Several projects are ongoing as a project investigator.