We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Vertical distribution and transport of microplastics in the urban atmosphere: New insights from field observations
AI summary Read the abstract
Researchers conducted field observations of airborne microplastics at four different heights in Guangzhou, China, from ground level up to 488 meters on the Canton Tower. They found that microplastic concentrations decreased with altitude but were still present at the highest sampling point, suggesting that these particles can travel through the atmosphere over long distances. The study provides the first detailed vertical profile of atmospheric microplastics in an urban setting, offering new insights into how these particles are transported through the air.
The distribution and transport of atmospheric microplastics (AMPs) have raised concerns regarding their potential effects on the environment and human health. Although previous studies have reported the presence of AMPs at ground level, there is a lack of comprehensive understanding of their vertical distribution in urban environments. To gain insight into the vertical profile of AMPs, field observations were conducted at four different heights (ground level, 118 m, 168 m and 488 m) of the Canton Tower in Guangzhou, China. Results showed that the profiles of AMPs and other air pollutants had similar layer distribution patterns, although their concentrations differed. The majority of AMPs were composed of polyethylene terephthalate and rayon fibers ranging from 30 to 50 μm. As a result of atmospheric thermodynamics, AMPs generated at ground level were only partially transported upward, leading to a decrease in their abundance with increasing altitude. The study found that the stable atmospheric stability and lower wind speed between 118 m and 168 m resulted in the formation of a fine layer where AMPs tended to accumulate instead of being transported upward. This study for the first time delineated the vertical profile of AMPs within the atmospheric boundary layer, providing valuable data for understanding the environmental fate of AMPs.
More Papers Like This
Atmospheric microplastics at a southern China metropolis: Occurrence, deposition flux, exposure risk and washout effect of rainfall
AI summary Read the abstract
Researchers measured airborne microplastics in Guangzhou, a major city in southern China, finding them throughout the year with higher levels during the rainy season. They estimated that adults in the city inhale tens of thousands of microplastic particles annually through normal breathing. Rainfall helped wash microplastics out of the air, but it also deposited them onto surfaces where they can enter water and soil, creating another pathway for human exposure.
Atmospheric transport and deposition of microplastics in a subtropical urban environment
AI summary Read the abstract
Researchers measured atmospheric wet and dry deposition of microplastics over one year in Guangzhou, China, a subtropical megacity. They found deposition fluxes ranging from 51 to 178 particles per square meter per day, with fibers, fragments, films, and microbeads all detected, indicating that atmospheric transport is a significant pathway for microplastic distribution in urban environments.
Spatial and seasonal variations of airborne microplastics in the emerging megacity of Hangzhou, China
AI summary Read the abstract
Researchers conducted a year-long sampling campaign across four urban zones in Hangzhou, China, to characterize airborne microplastics at human breathing height. The study found an average of 4.43 particles per cubic meter, with about 89% of particles smaller than 100 micrometers, predominantly fragments composed of polyamide and rubber, showing strong seasonal variation with lowest levels in summer.
Microplastics in the atmospheric of the eastern coast of China: different function areas reflecting various sources and transport
AI summary Read the abstract
Atmospheric sampling at two sites in a Chinese coastal city found microplastics suspended in the air at both downtown and industrial locations, but with different dominant sources — lifestyle and consumer products in the city center versus industrial activity in the industrial zone. The finding that microplastics are transported through the atmosphere confirms that people in urban areas are inhaling plastic particles regardless of proximity to industrial facilities.
Characterization of atmospheric microplastics: A case study in Shenzhen City, a southern coastal area of China
AI summary Read the abstract
Researchers characterized airborne microplastics at ten locations across Shenzhen, a major coastal city in southern China. They found an average abundance of 2.22 particles per cubic meter, with higher concentrations in areas of intense human activity and at lower altitudes. The study identified polyethylene, polypropylene, and polyester fibers as the most common types, and found that temperature and humidity influence airborne microplastic levels.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.