“Radioactive waste generated in the process of dismantling nuclear power plants requires a high cost of disposal. Hyundai E&C removed cesium by separating soil contaminated with radioactive substances by particle 

size and washing them with a potassium chloride solution.
An ion exchange reaction between potassium and cesium was used to separate cesium strongly bonded to clay soil. Cesium in washing water was selectively adsorbed and removed. “