PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY最新文献

{"title":"Regression models of adsorbing nickel (II) ions by carbon sorbents","authors":"N. V. Irinchinova, V. Dudarev, E. Filatova, V. Aslamova","doi":"10.21285/2227-2925-2021-11-3-349-357","DOIUrl":"https://doi.org/10.21285/2227-2925-2021-11-3-349-357","url":null,"abstract":"Abstract: The use of inexpensive materials such as sorbents increases the competitive advantages of removing heavy metal ions, including nickel (II) ions, from aqueous solutions and wastewater. Such materials include active carbons – carbon sorbents. The oxidized carbon sorbent AD-05-2 and its original analogue have been used as the object of this research. The oxidation of carbon sorbent AD-05-2 was conducted using a solution of nitric acid and urea following a conventional method. Oxidation resulted in improvement of the textural characteristics of the carbon sorbent. The total pore volume increased, including the volume of micropores, which had a positive effect on the sorption properties of the obtained sample. This article studies the adsorption of nickel (II) ions by the oxidized carbon sorbent AD-05-2 and its original analogue. For both models, the total time of establishing adsorptive equilibrium in the system adsorbate–adsorbent was 4 hours, pH = 9,6, and the range of temperatures – 298–338 K. The obtained experimental data on the nickel (II) ion adsorption are processed in the software package Statgraphics Plus. Adsorption isotherms are described using parabolic regression models, which cover 98.86–99.99% of the experimental data. The adsorption of nickel (II) ions increases with temperature, as indicated by a higher value of the first derivative dA/dCp, apparently, due to accelerated external diffusion. A significant steep rise of the isotherms corresponds to the temperature of 338 K, which indicates the diffusion effect on the adsorption process. The estimates of the accuracy of regression models are provided by the mean square σ and absolute Δ errors. Autocorrelation of experimental data is estimated using Durbin – Watson (DW) test. The obtained regression models can be applied for calculating the optimum parameters of nickel (II) ions’ adsorption from aqueous solutions and process stream using the oxidized carbonic sorbent AD-05-2 and its original analog.","PeriodicalId":20601,"journal":{"name":"PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76426349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transformation of oil dispersed systems during operation","authors":"V. Cherepanov, S. G. D’yachkova, I. I. Kuzora, D. A. Dubrovskii, V. Lukina","doi":"10.21285/2227-2925-2021-11-3-481-490","DOIUrl":"https://doi.org/10.21285/2227-2925-2021-11-3-481-490","url":null,"abstract":"Abstract: Using the example of oil road bitumen grades BND 100/130, BND 130/200 and BND 70/100, this article studies the transformation of oil dispersed systems under various logistic schemes of operation. This research focuses on the influence of the conditions for storing road bitumens of different grades on their physical and mechanical properties and group hydrocarbon composition during transportation from the manufacturer to the consumer. The results show that a change in the physical and mechanical properties of road bitumens during high-temperature storage is related to the changes in the group hydrocarbon composition due to the hydrocarbons autooxidation and destabilization of the colloidal structure of dispersal systems. The conditions for storing bitumen with a minimum change in its quality indicators have been determined. It has been established that storage of bitumen under atmospheric conditions allows preserving its original properties without significant changes. There is evidence that nitrogen purging significantly reduces the effect of homolytic processes leading to the transformation of oil dispersed systems during further transportation from the manufacturer to the consumer. Experimental data confirm that of all basic physical and mechanical properties of bitumen, “the depth of penetration of needle” is the most sensitive index, while the “softening temperature” index, frequently used for quality control of bitumen, is inertial. Determining the change in penetration, depending on the duration of storing bitumen, has required formulating a special equation. It has been established that when storing road bitumen at a temperature of 180 ºС, for each hour the index of the penetration depth of the needle at 25 º decreases by 0.8 units. Organizational and technical measures have been determined to ensure the stability of the road bitumen quality during manufacture, storage and transportation to consumers.","PeriodicalId":20601,"journal":{"name":"PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78090496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and study of oligohexamethyleneguanidine hydroiodide as a radiopaque substance","authors":"O. Ochirov, S. Stelmakh, M. Grigor’eva, V. Okladnikova, D. Mognonov","doi":"10.21285/2227-2925-2021-11-3-491-496","DOIUrl":"https://doi.org/10.21285/2227-2925-2021-11-3-491-496","url":null,"abstract":"Abstract: Diagnosis of complex injuries, such as splinter fractures and wounds, skull injuries accompanied by internal injuries that are inaccessible to visual control, presents the greatest difficulties during X-ray examination. Therefore, it is relevant to develop a drug that can help localize the site of a pathological lesion with high accuracy, relying only on the results of an X-ray study, which is possible when a reference point (substance) is applied to the patient’s skin. A radiopaque contrast compound based on an iodinated polymeric matrix with iodine as the contrasting component and polyguanidine as the carrier has been proposed to be used as a reference point substance. The choice of this class of polymers stemmed from the fact that a positive charge is localized to a greater extent on the carbon atom of the guanidine group, which allows loading iodine anions into it. Protonation of pure guanidine with hydroiodic acid has helped obtain guanidine hydroiodide. This finding was confirmed by IR spectroscopy methods (a decrease in the intensity of bands in the region of 1,380, 880 cm−1 in comparison with guanidine, as well as broadening of the band of stretching vibrations of amino groups characteristic of guanidine salts) and X-ray phase analysis. Polyhexamethylene guanidine hydroiodide was synthesized based on hexamethylenediamine and iodine-containing guanidine salt using melt polycondensation. The results show that the aqueous solutions of samples under study absorb X-radiation and are the X-ray-positive substances (exposure radiation dosage E = 0.04 mSV).","PeriodicalId":20601,"journal":{"name":"PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76983196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a probiotic for animals and aquaculture based on Bacillus toyonensis B-13249 and Bacillus pumilus B-13250 strains","authors":"A. Malkova, I. Evdokimov, M. Shirmanov, A. Irkitova, D. Dudnik","doi":"10.21285/2227-2925-2021-11-3-393-402","DOIUrl":"https://doi.org/10.21285/2227-2925-2021-11-3-393-402","url":null,"abstract":"Abstract: This article aims to develop a probiotic for animals and aquaculture based on the Bacillus toyonensis B-13249 and Bacillus pumilus B-13250 strains. The selection of a nutrient medium was conducted for cultivating the inoculum of these microorganisms. Several bacteria fermentations of the Bacillus genus were performed in biological reactors with a capacity of 15 and 250 l. A technology for obtaining a finished probiotic for animals and aquaculture was developed. The results indicate that L-broth is the most optimal nutrient medium for cultivating the studied strains. The cultivation of B. toyonensis B-13249 and B. pumilus B-13250 strains in fermenters revealed that sporulation begins after 4–8 hours of fermentation. In contrast to the vegetative medium, the fermentative medium helped the bacilli develop a higher optical density (the maximum value in the B. pumilus strain – 2.400±0.149), pH value (maximum value in the B. toyonensis strain – 8.483±0.609) and titer (at least 1010 CFU/g). After 20–24 hours of incubation, both strains of bacilli in the fermenter, almost completely pass into endospores, which serve as a signal for the start of biomass centrifugation. This was indicated by the following: from a 15 l fermenter – 83.3±6.1 g of concentrate, from a 250 l fermenter – 499.8±51.4 g. The number of bacilli in a concentrated state was at least 1·1011 CFU/g for both strains. Obtaining a finished preparation required mixing bacterial concentrates with maltodextrin to a titer of at least 1·1010 CFU/g. The number of bacteria in the preparation checked every month during the year, recorded no value less than 1·1010 CFU/g. Thus, L-broth is most favorable for growing the mother culture of the B. toyonensis B-13249 and B. pumilus B-13250 strains, and fermentative nutrient medium – for the cultivation in fermenters. The expiry date of the bacilli-based biological preparation is at least 12 months, during which the drug’s polycomponence, color and consistency are preserved, in addition to the bacteria titer (at least 1·1010 CFU/g) and their viability.","PeriodicalId":20601,"journal":{"name":"PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73457942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microbiologic assessment of accelerated solid-state fermentation of agricultural organic wastes","authors":"N. Fomicheva, G. Rabinovich, E. Prutenskaya, Yu. D. Smirnova","doi":"10.21285/2227-2925-2021-11-2-236-243","DOIUrl":"https://doi.org/10.21285/2227-2925-2021-11-2-236-243","url":null,"abstract":"Livestock and poultry wastes, when effectively managed, become feedstock for organic fertiliser production. Researchers from the All-Russian Research Institute of Reclaimed Lands, the branch of Federal Research Center “V.V. Dokuchaev Soil Science Institute”, proposed an accelerated regimen of cattle manure solid-phase fermentation with peat: 48 h at 37 °C, then 48 h at 60 °C and 24 h at 37 °C, terminating with nat-ural cooling of the fermented mass. A distinctive feature of the proposed accelerated fermentation is maintenance of set-point temperatures. The aim of the work is to perform a microbiological evaluation of the process of accelerated solid-phase fermentation. An experiment was carried out in a 1.75 dm3 laboratory fermenter. During the fermentation, we studied the number of microorganisms, which use organic and mineral nitrogen forms, using the limiting dilution method, as well as the species membership by mass spectrometry. The experimental findings showed that the temperature regime of the main fermentation steps yielded the maximum number of mesophilic and thermophilic nitrogen-transforming microorganisms. Their active growth caused the intensive transformation of the fermented mixture, as evidenced by mesophilic and thermophilic mineralisation coefficients. At the end of the process, the linear mineralisation coefficients were used to assess the completion of the fermentation product transformation and stabilisation. The fermentation product comprised a high number of nitrogen-transforming microorganisms (on average, 3.5±0.3•108 COE/g on a dry weight basis). The determination of the microbiota species membership in the fermented mass and the final product confirmed that the process temperature regime ensured the elimination of the sanitary-indicatory microorganisms present in the original mixture (E. coli, Citrobacter, Proteus). In addition, during pasteurisation, this regime led to the active development of non-pathogenic Bacillus bacteria (B. megaterium, B. subtilis, B. licheniformic, B. pumilus and B. altitudinis). The fermentation product is recommended for use as an environmentally safe organic fertiliser based on the microbiological evaluation.","PeriodicalId":20601,"journal":{"name":"PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80754433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of protatranes on the germination of wheat and triticale seeds after their long-term storage","authors":"G. Filipenko, S. Adamovich, E. N. Oborina, I. B. Rozentsveig, G. F. Safina","doi":"10.21285/2227-2925-2021-11-2-272-280","DOIUrl":"https://doi.org/10.21285/2227-2925-2021-11-2-272-280","url":null,"abstract":"The article studies the chemical compounds of a number of protatranes as biostimulants of the germination of wheat and triticale seeds after their long-term storage. The relevance of the study is determined by the need to restore the germination of unique samples of grain crops from the collection of the N.I. Vavilov All-Russian Institute of Plant Genetic Resources (VIR) (Saint Petersburg). The research objects were the seeds of different years of reproduction with various levels of original germination, as well as those with an initially high germination and subjected to accelerated aging. The experiments were conducted in the presence of the following physiologically active non-toxic protatranes 2-Me-C6H4OCH2COO- • HN+(CH2CH2OH)3 (1) and 4-Cl-C6H4SCH2COO-•HN+(CH2CH2OH)3 (2) across a wide range of concentrations (1•10-2 – 1•10-9M). At the first stage, the effect of protatrane 1 on the germination of soft spring wheat was investigated. It was observed that, under the influence of protatrane 1 at concentrations from 10-4 to 10-9 M, the seed germination and the germination energy increased by 8.7-20.0% and 4.7-8.0%, respectively. The use of protatrane 1 at higher concentrations (10-2M) resulted in a decrease in germination. Subsequently, experiments were carried out on 3 samples of soft winter wheat seeds stored for 52 years and having the germination of 19-26%. The 20-hour exposure of seeds to water solutions of protatrane 1 at concentrations of 5 • 10-7-10-9 M increased their germination by 3.7-10.0%. The best stimulating effect was achieved at a concentration of 5 • 10-7 M. At the next stage, the seeds with a high original germination (86-96%) and subjected to accelerated aging were investigated. The treatment of such samples with protatrane 1 at concentrations of 10-6 and 10-4 M turned out to be less effective: the germination and its energy either remained the same or increased insignificantly (by 3.5% and 7.5%, respectively). The treatment of triticale seeds with pro-tatranes 1 and 2 at a concentration of 5 • 10-7 M was carried out in a similar manner. It was shown that the action of protatranes 1 and 2 led to an increase in the germination by 3-7% and a significant increase in the germination energy by 7-45%. By further optimising the production process and selecting the most active protatranes, the described approach can provide for a significant recovery of seed germination.","PeriodicalId":20601,"journal":{"name":"PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88495995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microcalorimetric investigation of amylopectin branching and the content of amylose in potato starches","authors":"Y. Matveev, E. Averyanova","doi":"10.21285/2227-2925-2021-11-2-244-250","DOIUrl":"https://doi.org/10.21285/2227-2925-2021-11-2-244-250","url":null,"abstract":"Hydroxyethylated starches are of particular interest for applications in infusion therapy because of their high volemic effect. The duration of this effect depends on the circulation time of the drug in the blood, i.e., the volume of circulating blood increases with an increase in the concentration, molecular weight and degree of polymer substitution. It is known that hydroxyethylated starches have a wide range of molecular weight and degree of substitution. This allows their solutions to circulate for a long time (up to 10 hours) in the bloodstream without leakage of the active substance into the interstitium of vital organs. The dependence of the melting point of the crystalline starch lamella on the number of glucose residues can be described using the modified Fox - Loshaek ratio, which takes into account the degree of branching of amylopectin molecules and the content of amylose in starch. We proposed an analytical expression for the evaluation of the degree of branching of amylopectin from potato starch based on microcalorimetric data. The proposed methodology allows the genotypes of potatoes with the highest degree of amylopectin branching and a minimum quantity of amylose in starch to be selected. Starches of such potato varieties can be used in the blood plasma substitutes production - hydroxyethylated starches that have good pharmacodynamic properties. Within the developed approach, it is possible to determine the effect of the degree of substitution on the thermodynamic properties of the studied starches through a change in the melting temperature of the lamella, Tm, hence estimating the main pharmacodynamic parameters of substituted starches.","PeriodicalId":20601,"journal":{"name":"PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88099210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of humic acids in lowland peat on the remediation properties of wheat plants against heavy metal contamination","authors":"T. A. Kirdey","doi":"10.21285/2227-2925-2021-11-2-228-235","DOIUrl":"https://doi.org/10.21285/2227-2925-2021-11-2-228-235","url":null,"abstract":"Phytoremediation is a promising technology for removing heavy metals from soil and water. Despite the pronounced increase in heavy metal accumulation by cultivated plants under the influence of naturally occurring complexing agents, such as humic acids, their efficiency in phytoremediation has been poorly studied. In this regard, the aim of this work is to elucidate the effect of peat humic acid formulations on the remediation potential of wheat plants (Triticum aestivum L.) against heavy metal contamination. The influence of polymetallic pollution on the remediation properties of wheat was studied in model vegetation experiments using a culture solution. Plants were grown in a Hoagland nutrient solution. A complex exposure to heavy metals was simulated using 10 pmol/L CdSO4, 25 and 50 pmol/L CuSO4, 500 and 1000 pmol/L Pb(NO3)2 in various combinations with or without the addition of a peat humic acid formulation (0.005%).The phytoremediation efficiency of the humic acid formulation was determined by the removal of heavy metals during the heading stage of wheat growth. The research results showed that the phytoremediation efficiency of the humic acid formulation is defined by both an increase in the absorption of heavy metals and a decrease in their toxic action on the plants. In the case of mixed contamination of the solution with highly toxic heavy metals, the samples with humic acids showed a 1.2-2.5-fold increase in the accumulation of copper and cadmium by wheat plants. The data demonstrates the possibility of using the formulation of peat humic acids in phytoremediation technologies as an effector of heavy metal phytoextraction.","PeriodicalId":20601,"journal":{"name":"PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80814051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of transglutaminase in moulded food processing from waterlogged fish raw materials","authors":"T. Pivnenko, Y. Karpenko, Y. Pozdnyakova, V. Kraschenko, R. Esipenko","doi":"10.21285/2227-2925-2021-11-2-205-215","DOIUrl":"https://doi.org/10.21285/2227-2925-2021-11-2-205-215","url":null,"abstract":"Application conditions of the ACTIVA® TG-TI transglutaminase combined with setting agents (gelatine and chitosans of various modifications) are substantiated for moulded food processing from waterlogged fish raw materials targeted by deep-water fishery, i.e. giant grenadier (Albatrossia pectoralis). It was shown that combining different setting agents ensures time reduction of gel formation with a minor change in their development and melting temperatures. Adding an enzyme preparation leads to the formation of thermostable gels with a 1.5-fold increased strength. When forming gels from the grenadier muscle tissue in the presence of setting agents of different concentrations, the quality of soluble muscle proteins reduces, most prominently with gelatine and chitosan ascorbate. Physicochemical parameters of the structured gels prepared from the muscle tissue of giant grenadier (moisture retention capacity, tensile strength, water activity) and their organoleptic profiles were measured. Based on the results, we have shown that adding 3% of gela-tine, 0.06% of high-molecular chitosan and 1% of transglutaminase may be employed for processing moulded fish products. The digestibility of the protein components in obtained samples did not depend on fermentation. The overall protein deposition was between 0.38 and 0.56% of the sample mass. The total biological value of samples ranged from 78 to 134% when studying their effect on the growth of T. pyriformis testing culture.","PeriodicalId":20601,"journal":{"name":"PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79230807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption of petroleum products by modified and activated adsorbents","authors":"A. Chugunov, E. Filatova","doi":"10.21285/2227-2925-2021-11-2-318-325","DOIUrl":"https://doi.org/10.21285/2227-2925-2021-11-2-318-325","url":null,"abstract":"This research is aimed at investigating the adsorption of petroleum products from aqueous solutions by adsorbents modified with HCl and those activated by microwave radiation. The research objects were carbon adsorbents: activated coals, such as AD-05-2, IPI-T, KAD-iodine and zeolites of the TransBaikal deposit. The quantitative analysis of waters (standardised test solutions with an initial concentration of petroleum products not exceeding 10 mg/l) was carried out by the fluorimetric method using a Fluorat-02 liquid analyser. The adsorbents were activated in a microwave oven at a wave power of 800 W for 1 min. The modification was carried out according to the following procedure: 10 g of the adsorbents dried to a constant weight at a temperature of 120-150 °C were stirred for 24 h with 200 ml of a 12% HCl solution in water.Next, the suspension was filtered and washed with distilled water until neutral. It was found that the value of adsorption of petroleum products by adsorbents modified with HCl increases by 3.8 times for activated carbon KAD-iodine, 0.5 times for IPI-T, and equals 0.71 mg/g and 0.80 mg/g respectively. Among the studied sorbents, these sorbents have the largest grain size (3-5 mm) and micropore volume (0.28-0.29 cm3/g). It was established that the method of short-term (within 1 min) microwave activation makes it possible to increase the adsorption of petroleum products by: 4.2 times for activated carbon KAD-iodine and 0.6 times for IPI-T in comparison with the original adsorbents. The highest adsorption value of petroleum products corresponds to zeolites and equals 0.99 mg/g. The action of microwave radiation is associated with the dissociation and evaporation of the water bound in the adsorbents and flammable organic substances, which leads to an increase in the porosity of the adsorbent. The application of the microwave activation method is highly promising in comparison with the classic methods of chemical and steam-gas activation. This method simplifies the technological design and reduces the consumption of reagents for the production of effective adsorbents used to extract petroleum products from aqueous solutions, which acquires particular importance in the context of maintaining the environmental safety of water use.","PeriodicalId":20601,"journal":{"name":"PROCEEDINGS OF UNIVERSITIES APPLIED CHEMISTRY AND BIOTECHNOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83820962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}