We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Quantifying the Dynamics of Polystyrene Microplastics UV-Aging Process
AI summary Read the abstract
Researchers used single-particle ICP-MS to quantitatively track UV-aging of polystyrene microplastics, finding particles shrank from 5 to 1 µm while particle number concentration tripled, with pristine particles causing acute toxicity and aged particles inducing chronic reproductive inhibition in Daphnia magna.
Massive amounts of plastic waste have been released into ecosystems, generating huge amounts of microplastics (MPs) and nanoplastics (NPs) during the environmental aging process. However, particle size and number dynamics along the aging process have not been quantitatively assessed, which can greatly influence their fate and environmental risk assessment. We applied single particle inductively coupled plasma mass spectroscopy (spICP-MS) to quantitatively analyze the polystyrene (PS) MPs aging process with a wide particle size range (800 nm–5 μm) as well as particle number concentration at an environmentally relevant value (down to 7.1 × 106 particles/L). We investigated the UV-light accelerated aging dynamics of PS MPs and revealed the generation of large amounts of nano/microsize PS MPs fragments. PS MPs showed a rapid size downtrend along the aging process, shrinking from 5 to 1 μm. At the same time, PS MPs particle number concentration increased 3 times. Furthermore, pristine PS MPs may induce acute toxicity in feeding behavior, growth, and survival, while aged ones caused marked chronic toxicity on the reproduction inhibition of Daphnia magna, both at environmentally relevant concentrations. Overall, the research uncovered and quantified MPs particle size and concentration during the aging process, which is essential to assessing ecotoxicological risks of MPs/NPs.
More Papers Like This
Quantifying the Dynamics of Polystyrene Microplastics UV-Aging Process
AI summary Read the abstract
Researchers used a specialized mass spectrometry technique to track how polystyrene microplastics break down under UV light, quantifying changes in both particle size and number over time. They found that UV aging rapidly shrank particles from 5 micrometers down to 1 micrometer while tripling the total particle count, generating large numbers of smaller fragments. Toxicity tests on water fleas showed that fresh microplastics caused immediate harm to feeding and growth, while aged fragments produced longer-term reproductive effects.
Impact of UV Aging on the Toxicity and Bioavailability of Inductively Coupled Plasma Mass Spectrometry (ICP-MS)-Traceable Core–Shell Polystyrene Nanoplastics in an In Vitro Triculture Small Intestinal Epithelium Model
AI summary Read the abstract
Researchers developed gold-core polystyrene nanoplastics traceable by mass spectrometry to study how UV aging affects nanoplastic toxicity and uptake in a human intestinal cell model. The study found that UV aging altered the surface properties and biological behavior of nanoplastics, highlighting the importance of studying environmentally realistic, weathered particles rather than only pristine laboratory materials.
Microplastic removal from urban stormwater: Current treatments and research gaps
AI summary Read the abstract
Researchers investigated the phototransformation of polystyrene microplastics under simulated solar radiation, finding surface oxidation and formation of carbonyl groups after UV exposure. Photo-aged particles showed increased release of dissolved organic carbon and greater toxicity to marine copepods.
Single-Particle Analysis of the Photodegradation of Submicron Polystyrene Particles Using Infrared Photothermal Heterodyne Imaging.
AI summary Read the abstract
Researchers used a new infrared imaging technique to observe how submicron polystyrene particles physically and chemically degrade under UV light, finding significant chemical changes within just 6 hours. This is one of the first methods capable of tracking photodegradation of very small plastic particles, improving our understanding of how nanoplastics form and age in the environment.
Effect of UV-exposure on size, morphology, and chemical structure of polystyrene nanospheres in suspension
AI summary Read the abstract
Researchers investigated how UV exposure changes the size, morphology, and chemical structure of polystyrene nanospheres in suspension, simulating environmental weathering of nanoplastics. The study characterized how UV aging alters particle properties in ways relevant to their biological and environmental fate.
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.