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Information × Registration Number 0216U005306, 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 21-01-2016 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, humic acids . Methods of research - quantum chemistry, molecular statistics, photocolorimetry, adsorption calorimetry, X-ray phase analysis, atom-absorption spectrophotometry, gel chromatography, IR- photometry, mathematical processing of experimental data. Equipment - high-sensitive calorimeter Tiana-Calve Ms-70, spectrophotometer Specord IR-75, personal computer. Theoretical and practical results - the state of sodium humate in aqueous solution and on a solid surface is studied using various methods. It is shown that in aqueous solution at neutral pH values and low ionic strength this substance exists in an associated state. The values of molecular mass of the molecules in the preparation studied (Aldrich) are determined to be 1, 3 6 and 15 kDa. The sizes and molecular masses of sodium humate obtained in this way agree well with the data obtained by the chromatographic and electron microscopic measurements. In particular, the diameter of the smallest molecule study drug is 2.3 nm, and the largest - 9.0 nm. Novelty - the adsorption-based approach proposed in this study enables one to calculate the mass of humate molecule from its size or, vice versa, to calculate the size of the molecule from its mass. Efficiency of implementation - the proposed approach does not require expensive equipment, and will allow to determine the status of humic acids in aqueous solutions and on the surface of minerals, more reasonably choose methods of eliminating unwanted humic acid from water and humates use as modifiers of mineral adsorbents for the extraction of other pollutants from aqueous media. Field of use - environment protection. Product Description popup.authors Іванова Зінаїда Григорівна Аксененко Євген Володимирович Доленко Світлана Олександрівна Крисенко Дмитро Анатолійович Остапенко Роман Володимирович Трифонова Марина Юріївна popup.nrat_date 2020-04-02 Close