Biodegradation of poly(butylene succinate) in soil laboratory incubations assessed by stable carbon isotope labelling.

Autor: Nelson TF; Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, 8092, Zurich, Switzerland., Baumgartner R; Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, 8092, Zurich, Switzerland., Jaggi M; Geological Institute, Department of Earth Sciences, ETH Zurich, 8092, Zurich, Switzerland., Bernasconi SM; Geological Institute, Department of Earth Sciences, ETH Zurich, 8092, Zurich, Switzerland., Battagliarin G; BASF SE, Carl-Bosch-Strasse 38, Ludwigshafen, 67056, Germany., Sinkel C; BASF SE, Carl-Bosch-Strasse 38, Ludwigshafen, 67056, Germany., Künkel A; BASF SE, Carl-Bosch-Strasse 38, Ludwigshafen, 67056, Germany., Kohler HE; Environmental Microbiology, Swiss Federal Institute of Aquatic Science and Technology (Eawag), 8600, Dübendorf, Switzerland., McNeill K; Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, 8092, Zurich, Switzerland., Sander M; Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, 8092, Zurich, Switzerland. michael.sander@env.ethz.ch.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2022 Sep 28; Vol. 13 (1), pp. 5691. Date of Electronic Publication: 2022 Sep 28.
DOI: 10.1038/s41467-022-33064-8
Abstrakt: Using biodegradable instead of conventional plastics in agricultural applications promises to help overcome plastic pollution of agricultural soils. However, analytical limitations impede our understanding of plastic biodegradation in soils. Utilizing stable carbon isotope ( 13 C-)labelled poly(butylene succinate) (PBS), a synthetic polyester, we herein present an analytical approach to continuously quantify PBS mineralization to 13 CO 2 during soil incubations and, thereafter, to determine non-mineralized PBS-derived 13 C remaining in the soil. We demonstrate extensive PBS mineralization (65 % of added 13 C) and a closed mass balance on PBS- 13 C over 425 days of incubation. Extraction of residual PBS from soils combined with kinetic modeling of the biodegradation data and results from monomer (i.e., butanediol and succinate) mineralization experiments suggest that PBS hydrolytic breakdown controlled the overall PBS biodegradation rate. Beyond PBS biodegradation in soil, the presented methodology is broadly applicable to investigate biodegradation of other biodegradable polymers in various receiving environments.
(© 2022. The Author(s).)
Databáze: MEDLINE
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