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Information × Registration Number 0212U000366, 0111U000187 , R & D reports Title Modifying of silicates and oxides for the preparation of materials with controlled hydrophilic-hydrophobic balance, the study of state and structure of modifying layers, adsorbed molecules and ions. popup.stage_title Head Tarasevich Yuri Ivanovych, Registration Date 02-02-2012 Organization A.V Dumansky Institute of Colloid Chemistry and Water Chemistry popup.description2 Goal of research - the study of structural-sorption characteristics of organosilicates and hydrophobic-hydrophilic characterisctics of their surfaces. Research objects - adsorbents - natural and modified layer silicates; modifiers - cationic surface-active substances and cationic polyelectrolytes; adsorbates - water, methanol, anionic dyes. Methods of research - quantum chemistry, molecular statistics, adsorption, extraction photometry, sorption photometry, calorimetry, mathematical processing of experimental data. Equipment - calorimeter Calve, spectrofotometers SF-26, Specord UV-Vis, UV-2450, personal computer. Theoretical and practical results - the interaction of water molecules with the modifying layer of cation-active substance on the kaolinite sirface is studied. It is shown that the modification of layer silicates with cationic surfactant and polycation within their ion exchange capacity results in the increase of the adsorption capacity of the minerals with respect to the organic anions. The active centres on which the sorption of organic anions on the organomodified layer silicates takes place. Novelty - the modified BET equation is proposed for the description of nanocluster adsorption. The selectivity of layer silicates modified by cationic surfactant with respect to the anionic compounds is explained. For the first time ever the ion exchange heat of the cetylpiridinium on the Na-form of vermiculite is determined experimentally. Efficiency of implementation - the obtained results enable the purposeful choice of the proper modifier which would enable to control the selectivity of modified minerals with respect to different organic anions. Field of use - environment protection. Product Description popup.authors Іванова Зінаїда Григорівна Аксененко Євген Володимирович Діденко Ірина Авксентіівна Доленко Світлана Олександрівна Крисенко Дмитро Анатолійович Поляков Валерій Омелянович Трифонова Марина Юріївна popup.nrat_date 2020-04-02 Close