The Analysis of Polylactic Acid Oligomers and Their Fate in Laboratory and Agricultural Soil DOI

Jing Yang,

Changzhi Shi, Chaoran Xu

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Polylactic acid (PLA) is the most widely consumed biodegradable plastic worldwide. Though PLA products have advantages of easy degradation and a small carbon footprint, poly(lactic acid) oligomers (OLAs) released from been found to exhibit toxicity. Accurate quantification presence OLAs in soil crucial for understanding their occurrence environmental fate. In this study, we synthesized sequence-defined OLA standards deuterated (d-OLAs) developed broad-spectrum extraction method with water-saturated ethyl acetate 0.1% formic acid, achieving sensitive precise across various environments. The simulated experiments showed that PLA-based amounts OLAs, reaching peak within 24 h, followed by degradation, remaining detectable up 168 h. Meanwhile, degree polymerization (DP) 2 exhibited highest concentration, while higher-DP demonstrated greater stability compared others. field samples, were detected over long term beneath mulch films residual concentrations 16.10 ± 0.37 ng/g. This study bridges foundational analytical methods addresses data gaps further investigations into fates PLA.

Language: Английский

The Analysis of Polylactic Acid Oligomers and Their Fate in Laboratory and Agricultural Soil DOI

Jing Yang,

Changzhi Shi, Chaoran Xu

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Polylactic acid (PLA) is the most widely consumed biodegradable plastic worldwide. Though PLA products have advantages of easy degradation and a small carbon footprint, poly(lactic acid) oligomers (OLAs) released from been found to exhibit toxicity. Accurate quantification presence OLAs in soil crucial for understanding their occurrence environmental fate. In this study, we synthesized sequence-defined OLA standards deuterated (d-OLAs) developed broad-spectrum extraction method with water-saturated ethyl acetate 0.1% formic acid, achieving sensitive precise across various environments. The simulated experiments showed that PLA-based amounts OLAs, reaching peak within 24 h, followed by degradation, remaining detectable up 168 h. Meanwhile, degree polymerization (DP) 2 exhibited highest concentration, while higher-DP demonstrated greater stability compared others. field samples, were detected over long term beneath mulch films residual concentrations 16.10 ± 0.37 ng/g. This study bridges foundational analytical methods addresses data gaps further investigations into fates PLA.

Language: Английский

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