Results 1 - 10 of 17943
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[en] Boron sorption through SB-1 anionite from natural brines with 0.150 % concentration of B2O3 and pH value of 5.5 and 4.5 has been carried out. Total dynamic ion-exchange capacity is shown to decrease sharply with the increase of the brine filtration rate and to be independent on the process pH value and temperature. The value of dynamic ion-exchange capacity decreases with the increase of the brine filtration rate and also increases a little with the brine temperature increase up to 50 deg C. The possibility of boron desorption by water from the SB-1 resin due to hydrolysis is shown. Optimum conditions of the process are presented
[en] Sorption of boron ions through SB-1 anionite from natural brines with the following composition: Cl-1 - 23.12; SO4-2 - 2.03; HCO3-1 - 4.09; B2O3 - 0.150 weight % is investigated. Boron content was determined titrimetrically. Optimum conditions for the extraction - brine concentration does not below 0.10% in terms of B2O3, pH value is 4.0 and temperature of the process is 40 deg C. The equilibrium resin ion-exchange capacity under the above conditions is 110 mg/g of sorbent
[en] The theory of influence of reversible chemical reactions on interdiffusion of ions in condensate mediums was considered in present work. It was shown that chemical interaction of migrating ions with reactive centers considerably modified the nonequilibrium diffusion. The algorithms were elaborated and programme of kinetics assessment of reaction-diffusion systems was conducted.
[en] Prospects of using ion exchange for boron extraction from natural waters are investigated, and regularities of sorption by the dynamic method are studied. High efficiency of ANB-11 anionite during boron extraction from thermal waters is shown on the basis of the conducted investigations, and applicability of El'kin equation for description of output dynamic curves is proved. Regressive dependences permitting to forecast rather accurately operation of ion-exchange filter in a wide range of variation of liquid flow rate, dimention of sorbent granules, volume of the column and initial concentration of the extracted component are obtained
[en] The results of investigation of elution profiles and of the description of elution curves of inorganic sorbents are treated with regard to their use in radionuclide generators. An overview is given of the most important generators produced in nuclear reactors and in cyclotrons, including the inorganic sorbents employed as the parent radionuclide carriers. (Z.M.). 4 tabs., 6 refs