Features of Biodegradation of Thermoplastics Based on Polyesters in Different Climatic Zones

Лаптев, А.Б.; Nikolaev, E. V.; Kurchev, E.V.; Goryashnik, Yu.S.

doi:10.18577/2307-6046-2019-0-7-84-91

Cited by 5 publications

(4 citation statements)

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“…Antimicrobial treatment of industrial water with sodium hypochlorite resulted in a shift in the composition of dominant bacteria to Arenimonas and Pseudomonas (Gammaproteobacteria), which were probably more resistant to the reagent. The cyclic formation and removal of biofilms resulted in a more intense physicochemical degradation of the polymer, which contributed to its biodegradation by microorganisms [36]. Moreover, the presence of other aggressive reagents in industrial water, which affected the polymer structure, probably also contributed to PS chemical degradation.…”

Section: Discussionmentioning

confidence: 99%

“…The samples U10, U20, U40, and U60 (the Industrial group) were incubated for 10, 20, 40, and 60 days, respectively, at 14 to 27 • C in the block with recycling industrial water (the Ufaorgsintez petrochemical plant, Ufa). When microbial numbers in recycling water exceeded 10 5 cells/mL, 10% alkaline solution of sodium hypochlorite, an antiseptic widely used for water disinfection, was added to the block [36]. The samples U20, U40, and U60 were subjected to such treatment simultaneously (after 17 days of incubation).…”

Section: Incubation Of Ps Samplesmentioning

confidence: 99%

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Biodiversity of Microorganisms Colonizing the Surface of Polystyrene Samples Exposed to Different Aqueous Environments

et al. 2020

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The contamination of marine and freshwater ecosystems with the items from thermoplastics, including polystyrene (PS), necessitates the search for efficient microbial degraders of these polymers. In the present study, the composition of prokaryotes in biofilms formed on PS samples incubated in seawater and the industrial water of a petrochemical plant were investigated. Using a high-throughput sequencing of the V3–V4 region of the 16S rRNA gene, the predominance of Alphaproteobacteria (Blastomonas), Bacteroidetes (Chryseolinea), and Gammaproteobacteria (Arenimonas and Pseudomonas) in the biofilms on PS samples exposed to industrial water was revealed. Alphaproteobacteria (Erythrobacter) predominated on seawater-incubated PS samples. The local degradation of the PS samples was confirmed by scanning microscopy. The PS-colonizing microbial communities in industrial water differed significantly from the PS communities in seawater. Both communities have a high potential ability to carry out the carbohydrates and amino acids metabolism, but the potential for xenobiotic degradation, including styrene degradation, was relatively higher in the biofilms in industrial water. Bacteria of the genera Erythrobacter, Maribacter, and Mycobacterium were potential styrene-degraders in seawater, and Pseudomonas and Arenimonas in industrial water. Our results suggest that marine and industrial waters contain microbial populations potentially capable of degrading PS, and these populations may be used for the isolation of efficient PS degraders.

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Section: Discussionmentioning

confidence: 99%

Section: Incubation Of Ps Samplesmentioning

confidence: 99%

Biodiversity of Microorganisms Colonizing the Surface of Polystyrene Samples Exposed to Different Aqueous Environments

et al. 2020

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“…The contents of corrosive particles in the atmosphere -chloride, sulfate ions and ammonia vary greatly depending on the source of these ions [7][8][9][10]. The main sources of chloride ions are the ocean, seas, salt lakes; the source of sulfur dioxide is volcanic emissions, forest fires, fuel combustion products [11][12][13][14]. The main source of ammonia ions is the process of rotting plant residues and microbiological processing of plants and animal waste.…”

Section: Introductionmentioning

confidence: 99%

Distribution of chloride ions along the flight path of aircraft (Overview)

Лаптев

Akhiyarov²,

Lapteva

et al. 2022

J. Phys.: Conf. Ser.

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Based on the analysis of the literature, the number of corrosive particles entering the aircraft engine with air has been determined. It is shown that the atmosphere of the continents has the smallest number of chlorides, their maximum content on the seashore, the troposphere above 10 km has a stable amount of aerosol particles. A method for estimating the chloride content has been developed to predict the rate of sulfide-oxide corrosion of parts of the hot TRD tract.

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“…In the course of assessment of biological destruction of equipment materials of water circulation cycle, we studied microorganisms and macroorganisms, which populate the surface of steel 20 samples that are shown in the circulation cooling system of JSC «Ufaorgsintez» (Ufa, Russia) [1][2][3][4][5]. Sampling took place in 10, 20, 40 and 60 days.…”

mentioning

confidence: 99%

Specific Features of Biocorrosion of the Circulation Cooling System in the Petrochemical Industry

Лаптев¹,

Poltarukha

Tourova

et al. 2021

E3S Web of Conf.

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The circulating water of the cooling systems of petrochemical enterprises has a number of special features: the temperature of cooling water is in the range of 14-28 °С all year round, the evaporation of water in cooling towers increases the concentration of dissolved salts. Inevitable ingress of hydrocarbons, dosing of corrosion inhibitors, scaling, reagents for dispersing and softening of the water creates favorable conditions for micro- and macroorganisms development. Existing standards stipulate that the number of viable bacterial cells in planktonic form should not exceed 10 cells/ml, the number of bacteria in the adhered form is not regulated, nevertheless these organisms in particular lead to biocorrosion. During the assessing of the biological degradation of water cycle equipment materials, it was studied the micro- and macroorganisms that populate the surface of steel samples 20. Studies of the effect of this bacteria on the corrosion of steel 20 showed that this whole complex of micro- and macroorganisms, releasing metabolites into the water, also indirectly affects the processes of corrosion, and when choosing protection methods, it is necessary to take into account not only the presence and types of bacteria, but also the entire local biocenosis.

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Features of Biodegradation of Thermoplastics Based on Polyesters in Different Climatic Zones

Cited by 5 publications

References 0 publications

Biodiversity of Microorganisms Colonizing the Surface of Polystyrene Samples Exposed to Different Aqueous Environments

Biodiversity of Microorganisms Colonizing the Surface of Polystyrene Samples Exposed to Different Aqueous Environments

Distribution of chloride ions along the flight path of aircraft (Overview)

Specific Features of Biocorrosion of the Circulation Cooling System in the Petrochemical Industry

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