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The physicochemical calculations of the required amount of the GTT grade goptalum catalyst of ozone decomposition and the pressure drop on the catalyst bed under the operating conditions of the gas systems of particle accelerators were presented. The results of calculations were compared with the experimental data obtained in the gas system of the ATLAS detector unit of the Large Hadron Collider. The obtained physicochemical data make it possible to optimize the parameters of ozone filter destructors and the amount of catalyst required for purification of gas mixtures from ozone in detector units of accelerators.

A combination of chondroitin and glucosamine is widely used in clinical practice as both a symptomatic and structure-modifying agent for the treatment of osteoarthritis (OA). The emergence of new drugs based on this combination substantially expands treatment options for OA therapy.Objective: to evaluate the efficacy and safety of Artroflex® that is a combination of chondroitin sulfate 400 mg and glucosamine sulfate 500 mg (CS + GS) to support joint health in patients with knee and/or hip OA.Patients and methods. When implementing an open observational research program, the results of using the CS + GS complex were assessed in 644 OA patients (74.7% women) (mean age, 58.0±14.6 years) who experienced moderate/severe pain and required to continuously take non-steroidal anti-inflammatory drugs (NSAIDs). The CS + GS complex was prescribed in a dose of 2 capsules per day for 3 months. The investigators estimated changes in pain on movement by a 0 to 10 verbal pain scale, general health (GH) by a 0–10 visual analogue scale), the Lequesne index, the need for NSAIDs, and patient satisfaction with treatment and its tolerance.Results and discussion. After 3-month therapy, there were decreases in pain intensity by 49.2±16.8%, GH scores by 45.6±18.1%, the Lequesne index from 9.0 [6.0; 13.0] to 5.0 [3.0; 9.0]; less than half (45.2%) of the patients still needed for NSAIDs. 82.2% of patients were satisfied or completely satisfied with treatment results; 89.6% reported good treatment tolerance.Adverse events (apparently associated with NSAID use) were recorded in 2.2% of cases. There were no serious complications that required CS + GS treatment discontinuation or hospitalization.Conclusion. The findings have indicated that Artroflex® used to support joint health is an effective agent that controls OA symptoms and has a good safety level.

The aim of the research is to choose the most efficient adsorbent for two-stage ozone-sorption purification of groundwater containing both trichloroethylene (TCE) and tetrachloroethylene (PCE) betw...

In this research, the ozonation–sorption technology for water purification to remove trichloroethylene and tetrachloroethylene is presented. Physical and chemical (kinetic) parameters of consecutive ozonation and sorption of trichloroethylene and tetrachloroethylene from water are determined. The optimum technological parameters of this method for the purification of water from trichloroethylene and tetrachloroethylene are developed. R&D were carried out using water from 12 underground wells nearby Podolsk, Moscow region (Russia).

Coefficients of ozone solubility R t at pH values ranging from 0.1 to 11 are defined. The value of R t in a pH range from 2 to 6 is 0.3 ± 0.1. A decrease in Rt below the specified range is associated with the decay of ozone. The mechanisms of ozone decomposition in alkaline and acidic media are analyzed. Ozone solutions in acidic media are the most resistant.

This paper deals with the technology of ozonation together with sorption on activated carbons (AC) and its compliance with 12 principles of green chemistry. The report also provides an illustrative example of a drinking water treatment station with a capacity of 160 m3/h which purifies underground water from ions of iron by using ozone sorption technology and 12 principles of green chemistry. R&D, design, construction, and maintenance of the station are described. Our company LLC NVF ‘TIMIS’ was the first to propose an environmentally friendly method of disposal of residual products after purification of water by using them as components in the catalyst decomposition of ozone. The research work at Lomonosov Moscow State University has shown that ozonation with AC sorption technology reduces the concentration of total iron from 1.28 to 0.03 mg/L, reduces color grade and turbidity, provides disinfection and deodorization of water, and oxidizes organic and ions of iron more effectively than the oxidation of water by air or oxygen. This technology has successfully purified more than 8,000,000 m3 of underground water for the last 8 years.

The oxidation of manganese ions is shown to occur in ozone decomposition on manganese-containing catalyst, leading to the deactivation of a sample. The structure of the iron-containing catalyst does not change, ensuring its high stability during ozone decomposition in a dry gas flow at room temperature, conducted in the region of inner diffusion with an activation energy of 15.5 ± 0.7 kJ/mol. The presence of manganese cations in the intermediate stages of reduction is found to increase their activity in the reaction of deep methane oxidation.

Gas dynamic characteristics of commercial catalysts used in steam reforming and pollution-free catalysis have been investigated. Data that make it possible to predict the catalyst behavior under production conditions are represented. The optimal geometrical characteristics of the catalysts have been identified.

Effective ozone decomposition catalysts were created on the basis of iron oxides as side products from natural water treated with ozone at water treatment plants. Iron oxide catalysts doped with manganese oxide are by 40% more active in benzene oxidation. These iron-manganese catalysts can be recommended for industrial manufacture by the designed technologies and application in ozone decomposition and benzene oxidation processes.

A procedure was developed for the modification of the manganese-oxide catalyst hopcalite GFG allowing the new quality, water resistance of granules, to be reached. This procedure can be used for the reactivation of the exhausted catalytic contact.

The authors have investigated the equilibrated adsorption of water vapors on GFG hopcalite, which was obtained using the extrusion shaping method, with bentonite clay as the binding compound. In the frames of the BET model, the values of the monolayer capacity and the size of medium area occupied by the water molecule in the filled monolayer have been determined. The distribution of pores according to their sizes has been evaluated. It has been established that the modification of the bentonitic clay allows directed construction of the hopcalite porous structure,i.e. the formation of the mesoporous structure with a narrow distribution of the pores capacities by sizes, which was achieved varying the sizes of binding compound particles.

Cement-containing catalysts of ozone decomposition were synthesized on the basis of iron oxides obtained by ozonation of iron-containing aqueous solutions. X-ray diffraction analysis and Mossbauer spectroscopy showed that α-Fe2O3 occurs in the catalyst as highly dispersed nanoparticles. The catalysts obtained are efficient in the reaction of ozone decomposition and are as active as the best representatives of cement-containing catalysts of the GTT type.