We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Determination of atmospherically deposited microplastics in moss samples
Summary
Researchers developed and evaluated methods for detecting atmospherically deposited microplastics in moss samples, adapting established moss biomonitoring frameworks used for heavy metals and persistent organic pollutants to enable both particle-based and mass-based microplastic analysis.
Abstract Background Standardized methods for sampling and detection of atmospherically deposited microplastics are lacking. Contrary to that, the use of moss as a biomonitoring system was established concerning other atmospheric pollutants, such as heavy metals and persistent organic pollutants. Only a few research groups actually focus on detecting atmospherically deposited microplastics in moss. In general, the determination of microplastics in environmental samples is commonly performed using a particle-based or mass-based analytical approach. However, a dearth of mass-based investigations is noticeable, especially for atmospherically deposited microplastics. Given this background, this study shows the determination of atmospherically deposited microplastics in moss utilizing thermal extraction desorption gas chromatography-mass spectrometry (TED-GC-MS) and Raman microspectroscopy (µRaman) to acquire both information. The moss samples analyzed were collected as part of the German moss survey 2020/2021, supported by the German Environment Agency. Three distinct sampling sites were investigated, which could be categorized based on their distances from potential emission sources. Results Concerning µRaman analysis, most microplastic particles could be determined within a 10 to 100 µm size range. Further, most microplastic aspect ratios were determined in a range of 0.25 to 1.00, indicating a fragmental shape. Additionally, a correlation between the number of microplastic particles determined and the distance of the potential emission source was observable. It was determined to be 688, 474, and 248 particles per sampling site with a distance of 150 m, 225 m, and 360 m. Both analytical approaches (TED-GC-MS & µRaman) concurred in identifying the polymer types (polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET)) in the moss samples. Concerning TED-GC-MS, 7 to 111 µg/g could be determined, depending on the polymer types and distance to the potential emission source. Conclusion µRaman and TED-GC-MS investigations demonstrated correlations between microplastic particle numbers, size, types, and mass concentrations with the distance of the potential emission source. The investigation corroborates the mutual complementarity of both analytical approaches, enabling more comprehensive information on samples.
Sign in to start a discussion.
More Papers Like This
Monitoring moss reveals widespread deposition of airborne microplastics across the UK – practical lessons and recommendations
Researchers evaluated the use of moss as a biomonitor for atmospheric microplastic deposition across the UK, drawing on established protocols for monitoring metals and nutrients in mosses. The study demonstrated that moss biomonitoring is practical for large-scale spatial surveys and provided recommendations for standardized collection, processing, and quantification methods.
Potential Role of Mosses in Evaluating Airborne Microplastic Deposition in Terrestrial Ecosystems
This review examines the potential of mosses to serve as cost-effective biomonitors for tracking airborne microplastic deposition in terrestrial ecosystems. Preliminary studies indicate that mosses accumulate higher concentrations of microplastics than lichens, likely due to their physical structure. The study outlines steps needed to develop a standardized, reliable methodology for using mosses to monitor airborne microplastic pollution across both inhabited and remote regions.
The Use of Mosses in Biomonitoring of Air Pollution in the Terrestrial Environment: A Review
This paper is not about microplastics; it reviews the use of mosses as biomonitors for air pollution by metals and organic compounds.
Moss as a biomonitor for the atmospheric deposition of anthropogenic microfibres
Researchers used moss (Bryophyta) as a passive biomonitor to track atmospheric deposition of anthropogenic microfibres, finding that moss samples from various locations accumulated synthetic fibres reflecting local sources of airborne plastic contamination. The study establishes moss monitoring as a practical method for assessing microplastic atmospheric deposition without active collection equipment.
Determination of atmospherically deposited microplastics in moss: Method development and performance evaluation
German researchers developed a new method called µPEEL to extract microplastics from moss samples for atmospheric deposition monitoring, enabling both particle-count (Raman) and mass-based (thermal desorption GC-MS) analysis while avoiding harsh chemicals. The method outperformed conventional Fenton reagent digestion on environmental greenness and data quality metrics. Mosses are already used to monitor atmospheric heavy metals and nitrogen, and this work expands their utility to tracking airborne microplastic fallout.