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From legacy to emerging polycyclic aromatic compounds: Profiling in micro-nanoplastics emissions from plastic incineration
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When plastics like PVC, polypropylene, and polyethylene are burned, they release tiny plastic particles carrying toxic chemicals called PACs—many more harmful ones than the standard 16 pollutants regulators typically track. In fact, those "extra" unmonitored chemicals made up over half the cancer-causing potential in some cases, meaning current safety checks may be missing most of the risk. This matters because burning plastic waste (a common disposal method worldwide) could be exposing people to far more dangerous pollution than we realize.
Polycyclic aromatic compounds (PACs) are organic pollutants associated with incomplete combustion processes and connected to severe health effects. Their connection to micro-nanoplastics (MNPs) emitted as particulate matter from incineration of plastics remains poorly explored. In this study, we detected 65 Polycyclic Aromatic Hydrocarbon (PAH), oxygenated (OPAH) and nitrated (NPAH) PAC species in MNPs emitted during the incineration of three widely used plastic materials, high-density polyethylene (HDPE), polypropylene (PP) and polyvinyl chloride (PVC). MNPs were generated using the incineration exposure generation system (INEXS) and their PAC profile was offline analyzed using gas chromatography-mass spectrometry. Notably, one of the most abundant species in all three plastics was Benzanthrone, an OPAH previously associated with traffic and biomass burning emissions. MNPs emitted by PVC incineration contained emerging highly toxic PAC species such as benzo(c)fluorene, dibenzopyrenes, and 6-nitrochrysene. Our findings highlight the importance of monitoring beyond the legacy 16 EPA members which accounted only by 12%, 47%, and 41% of the associated carcinogenic potency (expressed as BaPeq), for PVC, PP and HDPE respectively. These results raise concerns for potential health implications and underscore the urgent need for further research on this new environmental challenge, MNP pollution and its association with toxic persistent pollutants.
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Pyroplastic particulate matter from fire events adds a hidden dimension of plastic pollution
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When plastic burns in wildfires, house fires, or trash burning, it doesn't just disappear, it creates a new type of tiny airborne particle that this review calls "pyroplastic particulate matter." These particles are especially concerning because they combine the lasting presence of microplastics with toxic chemicals from smoke (like tar-related compounds and heavy metals), and they're small enough to breathe deep into your lungs. This review pulls together existing research to argue that as fires increasingly burn through plastic-filled homes and landscapes, we need better tools to detect and understand this pollution, especially for people living near fire-prone are
Plastic burning: An important global source of atmospheric nanoplastic particles
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Researchers conducted smoldering laboratory experiments with PVC, PP, LDPE, PET, and PS plastics and used aerosol mass spectrometry to characterise the physical and chemical properties of nanoplastic particles emitted, finding that plastic burning generates large quantities of nanoplastics and thermo-oxidation products that represent a significant but poorly quantified global source of atmospheric nano-sized plastic particles.
Fine micro- and nanoplastics particles (PM2.5) in urban air and their relation to polycyclic aromatic hydrocarbons
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Researchers measured ultrafine micro- and nanoplastics in urban air at the individual polymer level for the first time, finding correlations between airborne plastic particle concentrations and polycyclic aromatic hydrocarbons, suggesting plastics act as carriers for toxic compounds.
Nanoplastic Particle Emissions from Plastic Smoldering Combustion
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Researchers conducted the first systematic study of nanoplastic particle emissions from smoldering plastic combustion, testing five common plastic types. They found that burning plastics at low temperatures produces significant quantities of airborne nanoplastic particles along with volatile organic compounds. The findings identify smoldering combustion, such as in open waste burning, as a previously uncharacterized source of atmospheric nanoplastic pollution.
GC-APCI expands the analytical window for detection of large PAHs (> 24 ringed-carbons) in pyroplastics and other environmental matrices
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Researchers developed a gas chromatography-atmospheric pressure chemical ionization method expanding the analytical window for detecting large polycyclic aromatic hydrocarbons with more than 24 ringed carbons in pyroplastics and other environmental matrices, identifying partially burnt plastic as a significant unrecognized microplastic source.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.