Study of sequential abiotic and biotic degradation of styrene butadiene rubber

被引:3
作者
Calarnou, Laurie [1 ]
Traikia, Mounir [1 ,2 ]
Leremboure, Martin [1 ]
Therias, Sandrine [1 ]
Gardette, Jean-Luc [1 ]
Bussiere, Pierre -Olivier [1 ]
Malosse, Lucie [3 ]
Dronet, Severin [3 ]
Besse-Hoggan, Pascale [1 ]
Eyheraguibel, Boris [1 ]
机构
[1] Univ Clermont Auvergne, Inst Chim ICCF, Clermont Auvergne INP, CNRS, F-63000 Clermont Ferrand, France
[2] Univ Clermont Auvergne, Plateforme Explorat Metab, MetaboHUB Clermont, Clermont Ferrand, France
[3] Ctr Technol Ladoux, Manufacture Francaise Pneumat MICHELIN, F-63040 Clermont Ferrand, France
关键词
Photo-ageing; Thermo-ageing; Biodegradation Rhodococcus ruber ATCC29672; Gordonia polyisoprenivorans VH2; LATEX CLEARING PROTEIN; ROAD WEAR PARTICLES; GROUND TIRE RUBBER; NATURAL-RUBBER; MICROBIAL-DEGRADATION; ELASTOMERIC MATERIALS; POLY(CIS-1,4-ISOPRENE) RUBBER; BACTERIAL-DEGRADATION; SYNTHETIC OLIGOMERS; PHOTO-OXIDATION;
D O I
10.1016/j.scitotenv.2024.171928
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Manufacture Fran & ccedil;aise des Pneumatiques MICHELIN, Centre de Technologies Ladoux, 63040 Clermont-Ferrand, France 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
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页数:14
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