PHA Microplastic Aging Decreases N₂O Sink Capacity: Released γ-Butyrolactone Decouples Denitrifying Electron Transfer and Oxidative Phosphorylation

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: 59(2), P. 1298 - 1307

Published: Jan. 9, 2025

Bacterial denitrification is a main pathway for soil N2O sinks, which crucial assessing and controlling emissions. Biobased polyhydroxyalkanoate (PHA) microplastic particles (MPs) degrade slowly in conventional environments, remaining inert extended periods. However, the impacts of PHA aging on bacterial sink capacity before degradation remain poorly understood. Here, model strain Paracoccus denitrificans was exposed to 0.05-0.5% (w/w) virgin aged MPs. Although no significant changes molecular weights were observed, MPs hindered cell growth reduction rates, leading surge 1H NMR spectroscopy UPLC-QTOF-MS analysis identified γ-butyrolactone as key component released from Metabolic verifications at cellular level confirmed its inhibition ATP synthesis. The that protonated hydrolyzed spontaneously periplasm would compete protons with ATPase destroy coupling between denitrifying electron transfer oxidative phosphorylation. Consequently, energy-deficient cells reduced supply reduction, did not contribute energy conservation. This work unveils novel mechanism by impairs highlights need consider environmental risks posed biobased aging.

Language: Английский

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Assessing toxicity of photoaged polystyrene microplastics to growth performance of rice (Oryza sativa)

Bioresource Technology Reports, Journal Year: 2025, Volume and Issue: unknown, P. 102079 - 102079

Published: Feb. 1, 2025

Language: Английский

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Characteristics of microplastic-derived dissolved organic matter and its binding with pharmaceuticals unveiled by fluorescence spectroscopy and two-dimensional correlation spectroscopy

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 908, P. 168190 - 168190

Published: Oct. 31, 2023

Language: Английский

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Studies on the transfer effect of aged polyethylene microplastics in soil-plant system

Chemosphere, Journal Year: 2023, Volume and Issue: 349, P. 141001 - 141001

Published: Dec. 19, 2023

Language: Английский

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Aging of polystyrene microplastics by UV/Sodium percarbonate oxidation: Organic release, mechanism, and disinfection by-product formation

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 464, P. 132934 - 132934

Published: Nov. 8, 2023

Language: Английский

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The iron matters: Aged microplastics disrupted the iron homeostasis in the liver organoids

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 906, P. 167529 - 167529

Published: Oct. 1, 2023

Language: Английский

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Understanding microplastic aging driven by photosensitization of algal extracellular polymeric substances

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 469, P. 133949 - 133949

Published: March 2, 2024

Language: Английский

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Plasmonic nanostar@metal organic frameworks as strong adsorber, enricher, and sensor for trace nanoplastics via surface-enhanced Raman spectroscopy

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 487, P. 150415 - 150415

Published: March 13, 2024

Language: Английский

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Macro- and microplastic leachates show a slightly toxic effect on seed germination of cotton

Chemosphere, Journal Year: 2023, Volume and Issue: 335, P. 139081 - 139081

Published: May 30, 2023

Language: Английский

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Deciphering fluorescent and molecular fingerprint of dissolved organic matter leached from microplastics in water

Water Research, Journal Year: 2023, Volume and Issue: 250, P. 121047 - 121047

Published: Dec. 20, 2023

Language: Английский

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