TY JOUR TI Rare Earth Metals Leaching from Coal Ash and Theirs Concentration KW rare earth metals leaching KW acid and biological treatment KW coal ash KW ion exchange concentration KW ion exchange resins KW scandium KW yttrium KW lanthanum. JO Safety in Technosphere AU Senik, E.. AU Vinogradov, M.. AU Taranov, R.. AU Kozodaev, A.. AU Ksenofontov, B.S. AU Voropaeva, A.. PY 2016 IS 5 PB INFRA-M Academic Publishing LLC.