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Promotional Effects And Risks Of Multi-Walled Carbon Nanotubes On Phytoremediation Of Plastic Films
Summary
Researchers combined alfalfa plants with multi-walled carbon nanotubes (MWCNTs) to enhance the breakdown of polyethylene plastic film in soil over 90 days, achieving surface-layer degradation rates above 11%. The combination significantly outperformed alfalfa alone, suggesting this plant-nanomaterial system has strong potential for remediating plastic-contaminated soils.
Alfalfa is a representative plant for remediating pollutants in soil, but its rate of plastic degradation rate remains low.Porous materials are often utilized as additives to improve pollutant degradation rates, yet the use of emerging nanomaterials (NMs) has not been tested.This study aims to combine alfalfa and carbon nanomaterials (CNMs) to research the degradation effect on double-layer polyethylene (PE) plastic films (PF) in soil.Meta-analysis was used to select multi-walled carbon nanotubes (MWCNTs) with low phytotoxicity from various NMs.In a 90-day dynamic experiment, the combination of 100 and 200 mg/kg MWCNTs and alfalfa significantly improved the PF degradation rate in both surface and bottom soil layers.In particular, the PF degradation rate of the surface layer, with the direct participation of alfalfa roots, reached a degradation of 11.081.34%.This suggests that a degradation system incorporating alfalfa and MWCNTs holds promising potential for plastic phytoremediation.