Kozhakhmetov, S., Mamytbekov, G., Kalmenova, G. and Beremzhanov, R. 2011. Scientific and technological bases of creation of artificial geochemical barriers on the basis of siliceous natural materials for protection of environment against heavy metals and padionuclides. Chemical Bulletin of Kazakh National University. 64, 4 (Dec. 2011), 145-150. DOI:https://doi.org/https://doi.org/10.15328/chemb_2011_4145-150.