2026-01-08 中国科学院（CAS）
MP and NP abundances in aerosols and estimated fluxes across atmospheric compartments in semiarid (XA) and humid subtropical (GZ) urban environments. (Image by HU Tafeng, et al)
＜関連情報＞
- https://english.cas.cn/newsroom/research_news/earth/202601/t20260107_1145371.shtml
- https://www.science.org/doi/10.1126/sciadv.adz7779
都市大気中のマイクロプラスチックとナノプラスチックの豊富さ Abundance of microplastics and nanoplastics in urban atmosphere
Tafeng Hu, Chongchong Zhang, Yuqing Zhu, Jing Duan, […] , and Daizhou Zhang
Science Advances Published:7 Jan 2026
DOI:https://doi.org/10.1126/sciadv.adz7779
Abstract
Microplastics (MPs) and nanoplastics (NPs) are emerging environmental pollutants, yet their behavior in the atmosphere remains poorly understood. Using an innovative method capable of detecting plastic particles as small as 200 nanometers, we quantified MPs and NPs in aerosols, dry and wet deposition, and resuspension in two Chinese megacities, Guangzhou and Xi’an. Airborne concentrations reached 1.8 × 105 MPs per cubic meter and 5.0 × 104 NPs per cubic meter in Guangzhou and 1.4 × 105 MPs per cubic meter and 3.0 × 104 NPs per cubic meter in Xi’an. Estimates revealed a variation of two to five orders of magnitude in MP and NP fluxes across major atmospheric compartments, dominated by road dust resuspension and rainfall-driven wet precipitation. Plastic particles were more heterogeneously mixed in deposition samples than in aerosols and resuspension, indicating enhanced aggregation and removal. These results provide an integrated assessment of MPs and NPs in urban atmospheric processes and offer critical insights into their transformation, fate, and potential implication for climate, ecosystems, and human health.
