Biodegradacja tworzyw sztucznych w obecności szczepów bakteryjnych wyizolowanych z terenów sąsiadujących z zakładami petrochemicznymi

• Autorzy: Szczyrba, Elżbieta , Gąszczak, Agnieszka , Szczotka, Anna , Pokynbroda, Tetiana , Koretska, Nataliia

Warianty tytułu

EN

Plastic biodegradation by bacterial strains isolated from areas surrounding petrochemical plants

• Języki publikacji: EN

Abstrakty

PL

W pracy opisano biodegradację folii LDPE w obecności nowych szczepów bakteryjnych wyizolowanych z terenów zanieczyszczonych przez przemysł petrochemii czny. Proces degradacji polimerów przez mikroorganizmy został potwierdzony poprzez zastosowanie różnych technik badań m.in.: określenie zmiany masy polimeru, spektroskopię podczerwieni FTIR i pomiar kąta zwilżania.

EN

Nowadays, plastics are widely used in all aspects of life. This is related to their physicochemical properties, high strength, durability, and low production costs. An alternative to conventional plastic waste management methods is environmentally friendly biodegradation. The importance of microorganisms in the biodegradation of plastics cannot be overstated. Bacteria, the most common organisms on Earth, are capable of surviving in various, even extreme, natural conditions. Hydrocarbon-degrading bacteria are believed to be an important factor in the formation of biofilm on the surface of petroleum-based polymers. The degradation of plastics occurs due to the metabolism of these bacteria, which can utilize hydrophobic hydrocarbons as a source of carbon and energy. Bacteria capable of breaking down aromatic hydrocarbons, such as benzene and styrene, have been isolated from soil samples taken near industrial plants. For further research, we selected strains OR13, OR23.1, and OR23.2, which exhibited the fastest styrene decomposition and the most intense biomass growth. The isolated strains showed morphological and biochemical diversity. The biodegradation of LDPE by strains OR13, OR23.1, and OR23.2 was assessed by measuring changes in film mass after incubation in bacterial cultures. The OR23.1 strain exhibited the highest biodegradation efficiency of LDPE at 1.49%. The biodegradation of LDPE by strains OR13, OR23.1, and OR23.2 was assessed by measuring changes in film mass after incubation in bacterial cultures. The OR23.1 strain exhibited the highest biodegradation efficiency of LDPE at 1.49%. The polyethylene films for strains OR13 and OR23.2 exhibited 1.29%, and 1.11% degradation efficiencies, respectively. The control sample did not experience a decrease in biomass. It has been established that the products of polyethylene biodegradation are safe for wheat, as their toxicity level did not exceed 20% for the tested strains. The experiments demonstrated that the tested strains affect the hydrophobicity of LDPE, increasing its sensitivity to biodegradation. The OR13 strain had the greatest impact, resulting in the largest decrease in contact angle when interacting with the polyethylene foil. Fourier-transform infrared spectroscopy (FTIR) showed changes in peak size and functional groups, confirming the modification of the polymer surface after biological treatment. The strains OR13, OR23.1, and OR23.2 were found to increase the carbonyl index of the biodegraded film. This is probably due to the biological activity of the microorganisms, which leads to the formation of new ketone or aldehyde C=O groups and indicates a higher degree of polymer oxidation.

Słowa kluczowe

PL

LDPE; biodegradacja; mikroorganizmy

EN

plastics; biodegradation; microorganisms

• Czasopismo: Prace Naukowe Instytutu Inżynierii Chemicznej Polskiej Akademii Nauk
• Rocznik: 2023
• Tom: Nr 27
• Strony: 105--122
• Opis fizyczny: Bibliogr. 24 poz., rys., wykr.

Twórcy

autor

Szczyrba, Elżbieta

• Instytut Inżynierii Chemicznej Polskiej Akademii Nauk, ul. Bałtycka 5, 44-100 Gliwice

autor

Gąszczak, Agnieszka

• Instytut Inżynierii Chemicznej Polskiej Akademii Nauk, ul. Bałtycka 5, 44-100 Gliwice

autor

Szczotka, Anna

• Instytut Inżynierii Chemicznej Polskiej Akademii Nauk, ul. Bałtycka 5, 44-100 Gliwice

autor

Pokynbroda, Tetiana

• Department of Physical Chemistry of Fossil Fuels of the Institute of Physical-Organic Chemistry and Coal Chemistry named after L. M. Lytvynenko of the National Academy of Sciences of Ukraine, Naukova str, 79060, Lviv, Ukraine

autor

Koretska, Nataliia

• Department of Physical Chemistry of Fossil Fuels of the Institute of Physical-Organic Chemistry and Coal Chemistry named after L. M. Lytvynenko of the National Academy of Sciences of Ukraine, Naukova str, 79060, Lviv, Ukraine

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