PRECIPITATION SEPARATION METHOD USING IONIC LIQUID TO SELECTIVELY EXTRACT Cs OR Sr FROM RADIOACTIVE WASTE LIQUID

摘要

The present invention relates to a composition for Cs and/or Sr precipitation separation, and a method for precipitation separation of Cs and/or Sr from aqueous solution containing Cs and/or Sr. According to the present invention, the composition comprises: an extraction agent capable of forming precipitates with anions of an ionic liquid, and Cs or Sr ions; and the ionic liquid capable of exchanging cation with Cs or Sr ions by the extraction agent, and having the content capable of forming the precipitates with Cs or Sr ions, and the extraction agent. Accordingly, the ionic liquid has an excellent performance to selectively separate Cs and Sr, and a recovery rate of extracts is excellent due to precipitation solid-liquid separation, so the amount of generated waste liquid and treatment costs are reduced.;COPYRIGHT KIPO 2016