Study of sequential abiotic and biotic degradation of styrene butadiene rubber.

Autor: Calarnou L; Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut de Chimie (ICCF), F-63000 Clermont-Ferrand, France., Traïkia M; Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut de Chimie (ICCF), F-63000 Clermont-Ferrand, France; Université Clermont Auvergne, Plateforme d'Exploration du Métabolisme, MetaboHUB Clermont, Clermont-Ferrand, France., Leremboure M; Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut de Chimie (ICCF), F-63000 Clermont-Ferrand, France., Therias S; Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut de Chimie (ICCF), F-63000 Clermont-Ferrand, France., Gardette JL; Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut de Chimie (ICCF), F-63000 Clermont-Ferrand, France., Bussière PO; Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut de Chimie (ICCF), F-63000 Clermont-Ferrand, France., Malosse L; Manufacture Française des Pneumatiques MICHELIN, Centre de Technologies Ladoux, 63040 Clermont-Ferrand, France., Dronet S; Manufacture Française des Pneumatiques MICHELIN, Centre de Technologies Ladoux, 63040 Clermont-Ferrand, France., Besse-Hoggan P; Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut de Chimie (ICCF), F-63000 Clermont-Ferrand, France., Eyheraguibel B; Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut de Chimie (ICCF), F-63000 Clermont-Ferrand, France. Electronic address: boris.eyheraguibel@uca.fr.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 May 20; Vol. 926, pp. 171928. Date of Electronic Publication: 2024 Mar 24.
DOI: 10.1016/j.scitotenv.2024.171928
Abstrakt: Styrene butadiene rubber is one of the main constituents of tire tread. During tire life, the tread material undergoes different stresses that impact its structure and chemical composition. Wear particles are then released into the environment as weathered material. To understand their fate, it is important to start with a better characterization of abiotic and biotic degradation of the elastomer material. A multi-disciplinary approach was implemented to study the photo- and thermo- degradation of non-vulcanized SBR films containing 15 w% styrene as well as their potential biodegradation by Rhodoccocus ruber and Gordonia polyisoprenivorans bacterial strains. Each ageing process leads to crosslinking reactions, much surface oxidation of the films and the production of hundreds of short chain compounds. These degradation products present a high level of unsaturation and oxidation and can be released into water to become potential substrates for microorganisms. Both strains were able to degrade from 0.2 to 1.2 % (% ThOD) of the aged SBR film after 30-day incubation while no biodegradation was observed on the pristine material. A 25-75 % decrease in the signal intensity of water extractable compounds was observed, suggesting that biomass production was linked to the consumption of low-molecular-weight degradation products. These results evidence the positive impact of abiotic degradation on the biodegradation process of styrene butadiene rubber.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Laurie Calarnou, Mounir Traikia, Martin Leremboure, Sandrine Therias, Jean-Luc Gardette, Pierre-Olivier Bussière, Pascale Besse-Hoggan, Boris Eyheraguibel reports financial support was provided by French Manufacture of Michelin Tyres. Severin Dronet, Lucie Malosse reports a relationship with French Manufacture of Michelin Tyres that includes: employment.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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