Microplastics Exacerbated Conjugative Transfer of Antibiotic Resistance Genes during Ultraviolet Disinfection: Highlighting Difference between Conventional and Biodegradable Ones

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 26, 2024

Microplastics (MPs) have been confirmed as a hotspot for antibiotic resistance genes (ARGs) in wastewater. However, the impact of MPs on transfer ARGs wastewater treatment remains unclear. This study investigated roles and mechanisms conventional (polystyrene, PS) biodegradable (polylactic acid, PLA) conjugative during ultraviolet disinfection. The results showed that significantly facilitated compared with individual disinfection, PSMPs exhibited higher facilitation than PLAMPs. effects were attributed to light shielding production reactive oxygen species (ROS) nanoplastics from irradiation MPs. protected bacteria inactivation. More importantly, ROS generated irradiated induced intracellular oxidative stress further increased cell membrane permeability intercellular contact, ultimately enhancing ARG exchange. greater fragmentation PLAMPs resulted stronger enhancement. highlights concerns associated treatment, which provides new insights into combined risks environment.

Language: Английский

微塑料介导的土壤碳循环:微塑料对土壤有机碳的形成，矿化和稳定过程的影响

Scientia Sinica Technologica, Journal Year: 2024, Volume and Issue: 54(10), P. 1854 - 1867

Published: April 24, 2024

微塑料污染已成为全球生态系统最严重的威胁之一,其不仅对陆地和海洋生态系统、生物多样性和人体健康产生影响,还会通过影响土壤有机碳固定扰动全球气候。土壤中微塑料可以直接参与碳循环或间接影响理化性质和微生物群落来影响土壤有机碳周转过程。本文从微塑料影响土壤有机碳测定,以及微塑料介导的有机碳形成过程、矿化和稳定过程等方面,阐明了微塑料对土壤有机碳库的影响,并深入探讨了微塑料调控土壤有机碳循环的可能机制。未来需从微塑料源碳的精准识别、碳过程关键微生物作用机制、多因素影响下碳循环过程等方面开展进一步的研究工作。

Preliminary insights into the photosensensitivity of bio-based plastics: Release of microplastic-derived organic matter in water under UV irradiation

Environmental Pollution, Journal Year: 2024, Volume and Issue: 367, P. 125619 - 125619

Published: Dec. 31, 2024

Language: Английский