Generally, Uranium(VI) ions are getting into the water from natural deposits or as a result of its contamination with waste from mines or nuclear power plants. Even a few amounts of radionuclides in drinking water are fraught with human health problems. P-derivative compounds exhibit strong affinity for radionuclides and have a promising application for U(VI) removal in environmental protection. Also, the porous structure increases the number of active centres on the surface of the adsorbents, which removal U(VI) ions with increasing efficiency of the water purification [1]. The authors synthesized a series of SBA-15 type mesoporous materials with different structures and assessed their U(VI) removal performance. Phosphor-derivatives modified SBA-15 adsorbents were synthesized by two-rout procedures. In route 1 bare SBA-15 was reacted with Diethylphosphatoethyltriethoxysilane followed by salinization reaction procedure (post-grafting procedure, SBA(CH2)2PO3H2). In route II involved preparation of vinyl-functionalized diatomite, which was reacted with the Di-n-Butyl Phosphine Oxide in the presence of AIBN as an initiator (polymerisation procedure, SBA(CH2)2PhOx). The effects of the SBA-15 modification have been studied using powder XRD, SEM/TEM, N2 isotherms ad/desorption, FTIR spectroscopy, acid-base titrations, etc. Figure 1. TEM images of SBA(CH2)2PhOx (a) and SBA(CH2)2PO3H2 (b) samples. The adsorption amount of U(VI) ions using the prepared SBA(CH2)2PhOx and SBA(CH2)2PO3H2 adsorbents were 95.63% and 95.50%, respectively, which are higher compared to other published adsorbents. Thus, the proposed methodology can be used for the production of a high-performance sorbents for U(VI) ion removal in large volumes.