Tire Wear Particles Exposure Enhances Denitrification in Soil by Enriching Labile DOM and Shaping the Microbial Community
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View abstract on PubMed
Summary
This summary is machine-generated.Tire wear particles (TWP) increase soil greenhouse gas emissions and nitrogen loss by altering soil organic matter and microbial communities. These emerging contaminants pose risks to soil fertility and climate change mitigation efforts.
Area Of Science
- Environmental Science
- Soil Science
- Biogeochemistry
Background
- Tire wear particles (TWP) are widespread soil contaminants with unknown effects on soil biogeochemical processes.
- Understanding TWP impacts is crucial for soil health and environmental management.
Purpose Of The Study
- To investigate the effects of TWP and their leachate on soil respiration and denitrification.
- To elucidate the underlying mechanisms using advanced analytical techniques.
Main Methods
- Robotized continuous-flow incubation system for upland soil.
- Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) and high-throughput sequencing.
- Analysis of soil respiration, denitrification, dissolved organic matter (DOM), and microbial communities.
Main Results
- TWP exposure significantly increased soil CO2, N2, and N2O emissions.
- TWP altered soil DOM composition, enriching labile components crucial for denitrification.
- Abundances of denitrification genes (nirK/S, nosZ-I) and Pseudomonas genera increased.
Conclusions
- TWP exposure disrupts soil carbon and nitrogen cycling, potentially exacerbating greenhouse gas emissions.
- Increased labile DOM and specific microbial changes drive enhanced denitrification and gas release.
- TWP pose adverse effects on soil fertility and climate change mitigation, particularly in peri-urban areas.
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