The aim of the research was to identify the frequency of development of the syndrome of post-exercise bronchial spasm in patients with asthma against physical load and the study of clinical-functional features of its course. 197 patients (122 women and 75 men) with mild persistent partially controlled and uncontrolled asthma were observed. The mean age of the patients was 36.1±0.73 years old; the mean height was 168.8±0.63 cm; the mean weight was 74.6±1.03 kg. The patients did not have strong obstructive disorders of the ventilation pulmonary function; forced expiratory volume for the first second (FEV1) was 91.6±2.5% from the predicted value. All the patients had clinical-anamnestic test and the assessment of apnoea degree by the scale of mMRC and identification of disease control by validated questionnaire Asthma Control Test; the airway response was evaluated in reaction to dosed physical load calculated and fulfilled at the research complex for ergospirometric studies OxyconPro (VIASYS Healthcare, Germany); basic study of the lung function at the device Easyone-PC (Switzerland) was done. As a result of the study post-exercise bronchial spasm was diagnosed in 18.3% of patients with asthma. Close positive correlation between the baseline FEV1 (in %) and bronchial response to the dosed physical load measured at the first minute of the recovery period (r=0.19; р<0.05) as well as the intensity of the further bronchial response at the 10th minute of the recovery period (r=0.19; р<0.05) was registered. The intensity of bronchial response at the 10th minute of the recovery period in patients with airway hyperresponsiveness to dosed physical load was directly related with the degree of asthma control (r=0.56; р˂0.05). It was found out that the degree of the asthma control correlated with the airway hyperresponsiveness to physical load.

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Problems related to rare earth metals leaching from coal ash and theirs ion-exchange concentration from sulfuric solutions, in particular the characteristics of scandium, yttrium and lanthanum sorption by different ion exchange resins have been considered in this work. It has been shown that the best way to leach rare earth metals from coal ash is a complex acid and biological treatment of ash waste. Kinetics related to the process of scandium, yttrium and lanthanum acid leaching from ash and slag waste of CHPP in Kumertau has been investigated. Subsequent metal solutions concentration was achieved using ion exchange resins. The results of experimental studies related to the processes of rare-earth metals (in particularly scandium) ion exchange concentration by cation exchange resin in the Naform PC-100 have been presented, as well as the results of experimental studies related to rare earth metals (scandium including) sedimentation process, using special sedimentators. Dependences of rare earth metals (in particular scandium) sedimentation efficiency against pH value have been constructed, and recommendations for pH values, that are optimal for rare earth metals sedimentation, have been given. Based on obtained experimental results it was created and tested an experimental laboratory prototype of plant for rare earth metals (scandium, yttrium and lanthanum including) extraction from located near Moscow brown coal basin’s slag heaps, and from ash dumps of Russian Federation’s energy enterprises. This plant’s process flow diagram as well as its operation description has been presented. The created plant was tested in modes previously fulfilled in laboratory conditions. At the same time, carried out integrated exploration have showed the prospects for implementation of developed technical solutions for processing of ash dumps of Russian Federation’s various energy enterprises.

The article covers theoretical basics of floatation process and main stages of flotators’ evolution. special attention is paid to flotation as multistage process as well as to definition of constants with theoretical and the experimental methods. Authors demonstrate that use of theoretical bases of multistage flotation model allows to significantly stimulating floatation process. Leading foreign and domestic innovations in floatation sewage treatment and active sludge thickening are presented. Promising research in constructing multi-tool floatation apparatus (flotation combine) is described. The article provides variants of multi-tool flotators’ design, examples of its integration into operation, and the test data confirming its high effectiveness for sewage treatment and active sludge thickening. Methods of stimulating thickening with carbon dioxide and chemical agents are used for wastewater sludge (including active sludge).