生物降解
矿化(土壤科学)
聚丁二酸丁二醇酯
土壤水分
聚酯纤维
环境化学
生物可分解塑胶
聚合物
水解
化学
可生物降解聚合物
材料科学
化学工程
有机化学
环境科学
高分子化学
土壤科学
工程类
作者
Taylor F. Nelson,Rebekka Baumgartner,Madalina Jaggi,Stefano M. Bernasconi,Glauco Battagliarin,Carsten Sinkel,Andreas Künkel,Hans‐Peter E. Kohler,Kristopher McNeill,Michael Sander
标识
DOI:10.1038/s41467-022-33064-8
摘要
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 (13C-)labelled poly(butylene succinate) (PBS), a synthetic polyester, we herein present an analytical approach to continuously quantify PBS mineralization to 13CO2 during soil incubations and, thereafter, to determine non-mineralized PBS-derived 13C remaining in the soil. We demonstrate extensive PBS mineralization (65 % of added 13C) and a closed mass balance on PBS-13C 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.
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