Глауконит является минеральным сорбентом и широко используется в процессах очистки водных объектов от загрязнителей. При создании новых сорбентов с улучшенными сорбционными свойствами на основе глауконита используют различные методы модифицирования и активации. Проведено модифицирование глауконита раствором хлорида натрия и активация соляной кислотой и гидроксидом натрия. Методом дифференциальной сканирующей калориметрии (ДСК) осуществлена оценка состояния воды в образцах глауконита исходного и химически обработанного. Получены тер-мограммы дегидратации образцов. Показана зависимость количества сорбированной воды глаукони-том от обрабатывающего химического агента.Ключевые слова: глауконит, модифицирование, активация, дегидратация, термический ана-лиз, тепловые эффекты, состояние воды. Study of the water state in chemically treated glauconite samples by thermal analysisNiftaliev S.I., Peregudov Yu.S., Mejri R., Saranov I.A. Voronezh State University of Engineering Technologies, Voronezh,Glauconite can be used to create new composite sorbents for water purification from oil. Methods for modifying and activating natural sorbents are used to improve their sorption properties. When oil is absorbed by the sorbent, water absorption takes place, which reduces its oil capacity. It is of interest how the moisture retention capacity of glauconite varies, after its chemical treatment. Glauconite was treated with solutions of sodium chloride, hydrochloric acid and sodium hydroxide. The process of dehydration of the initial and chemically treated glauconite samples was examined on a synchronous thermal analysis instrument (TG-DTA / DSC) of the model STA 449 F3 Jupiter, the company NETZSCH in a nitrogen atmosphere. The accuracy of temperature measurement is 0.1 °C using differential scanning calorimetry (DSC) and thermogravimetry (TG) methods. As a result of the study, thermograms were obtained, depending mainly on the chemical composition and structure of the test substance. On the DSC curves, one endothermic effect is observed, accompanied by a change in the mass of glauconite samples on the TG curves. The thermal effect corresponds to the removal of water from glauconite samples. The process of dehydration of glauconite samples treated with these reagents proceeds at lower temperatures than for the initial sample. A glauconite sample modified with sodium chloride is characterized by the lowest enthalpy of the dehydration process. The degree of conversion α (mass ratio at time "t" to the total change in mass at the end of the process) is calculated from the TG curves as a function of temperature. The obtained dependences are S-shaped, which indicates the complex nature of the interaction of water molecules with glauconite and suggests a different rate of water release at different stages of dehydration. From the graphical dependences (-lgα) on the value (103 / T), three stages of dehydration of the samples were determined, which correspond to the release of moisture with

In this article the method of the differential scanning calorimetry was realized for a water state assessment in sodium, iron, lanthanum and chromic forms of an ion-exchange fiber VION KN-1. The technique of carrying out the experiment is described. The objects of research were the hemosorbtional fiber VION KN-1. For study of process of dehydration, the fiber was transferred to metal forms with static upholding in solution of salt of the appropriate metal. Initially, the fiber was in the sodium form. Research of process of dehydration of fiber in metal forms was conducted with the synchronous thermal analysis using STA 449 F3, Jupiter, NETZSCH firm in the atmosphere of nitrogen. The temperature program of heat treatment of fiber is presented. The results of the differential scanning calorimetry are also presented in the form of thermoanalytical curves for iron and chromic forms of fiber of VION KN-1. The dependence of amount of sorbed water on the ionic form of fiber is shown. Availability of water of different level of coherence is revealed. Dependence of level of transformation of substance on temperature is calculated. Diagrams of dependence of logarithm of level of transformation of substance on temperature are constructed. The quantitative characteristics of kinetic unequal molecules of water for the initial and metal forms of fiber in the field of limit bloating are shown. In outputs comparing of water state in metal forms of fiber with its state in the sodium form is carried out. Comparison of results of similar researches of metal forms of fiber for ions of trivalent and bivalent metals is carried out. As a result of the conducted researches it was established that the amount of water of different level of coherence in metal forms of carboxyl- containing fiber VION KN-1 is determined by the nature of anti-ions.Forcitation:Niftaliyev S.I., Peregudov Yu.S., Eyvazova Yu.Z., Saranov I.A. Hydration characteristics of KN-1 VION hemosorbtional fibre in sodium, iron, lanthanum and chromic forms. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 2. P. 33-37.

Background: Wastewater from the mineral fertilizer production, agribusiness containing ammonium ions causes significant harm to fish farming; therefore, it must be purified before discharge. Ion-exchange sorption is a promising method for isolating ammonium cations. The object of the study was a chemisorption fiber VION KN-1, which has developed surface and high sorption rate. Purpose: To study the sorption kinetics of ammonium cations from aqueous solutions on VION KN-1; to train an ANN to predict the degree of recovery of ammonium ions from wastewater using Statistica Neural Networks Version 13. Methods: The ammonium ion concentration in the solution was established by direct potentiometry. Sorption isotherms were constructed using the method of variable concentrations. To determine the limiting stage, the obtained kinetic dependencies were represented in the coordinates of the Boyd-Adamson equations for internal/external diffusion. Results and Discussion: During sorption from solutions with different ammonium nitrogen contents, the values of distribution coefficients (Kd) are at the level of 2.3ꞏ103 cm3/g, which significantly exceeds this parameter for granular ionites. Experimental sorption data were verified using Freundlich (R2 = 0.9224) and Langmuir (R2 = 0.9996) isotherms. The maximum degree of recovery (over 96 %) was achieved by passing a solution with a concentration of 11.3 mmol/dm3. Using an array of experimental data, the MLP-3-5-1 neural network was trained. The coefficient of determination R2 = 0.999420 obtained for the training sample characterizes high network performance. Conclusions: The Langmuir equation better describes the process of NH4+ sorption on a fibrous sorbent. It is reasonable to use VION KN-1 at the fine treatment stage. Ammonium ion desorption from the fiber was performed by acid solution. The resulting solutions of ammonium salts can be used as liquid fertilizers. The trained neural networks can be used to predict the degree of recovery of ammonium ions by sorbent VION KN-1.