About The Author

Tatiana Vereshchagina works at the Institute of Chemistry and Chemical Technology of the Siberian Branch of the Russian Academy of Sciences (ICCT SB RAS), Federal Research Center “Krasnoyarsk Science Center SB RAS”, Russia. Her research interests are sorbents and processes for purification and immobilization of liquid radioactive waste.

Coal Fly Ash Cenospheres For Immobilization Of Alkaline Radioactive Waste In Mineral-Like Compounds

Alkaline high-level wastes are produced in nuclear fuel reprocessing plants as a result of the neutralization of initially acidic solutions with sodium hydroxide. The typical neutralized alkaline wastes are tank supernatants in the United States at DOE sites (Hanford, Savannah River, Oak Ridge) having the actual NaOH concentration of 0.75 to 7 M. Radioactive alkaline solutions