We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
[Aging Process and DOC Analysis of Four Different Types of Plastic Particles in Freshwater Systems].
AI summary Read the abstract
This study examined how four common types of plastic particles fragment and release dissolved organic carbon in freshwater over a 40-day natural light experiment. Different plastic types aged and broke down at different rates, highlighting that the environmental fate of microplastics varies significantly by polymer type.
Although the pollution of freshwater systems by microplastics and the resulting ecological effects have attracted widespread attention from scholars at home and abroad, the fragmentation of different types of microplastics in the natural environment has not yet received enough attention. To analyze the fragmentation processes and products of different types of microplastics, a 40 d natural light fragmentation experiment was carried out using four microplastics commonly found in water:polystyrene (PS), low-density polyethylene (LDPE), polypropylene (PP), and polyhydroxybutyrate (PHB). The pH, ORP, EC, and DO of the four types of plastic-aging liquids changed significantly during the aging process. During the weathering process, cracks and pores formed on the surface of LDPE and were later identified through scanning electron microscopy. Fourier transform infrared spectrometry indicated that the carbonyl index of LDPE increased the most in the experiment (an increase of 31.48%), suggesting that PP experienced significant aging. Dissolved organic carbon (DOC), a product of microplastics fragmentation, increased as weathering time progressed, and the concentration of DOC increased significantly after weathering for about 40 d. Compared with the baseline value, the concentration of DOC from PHB, PP, and LDPE in the leaching solution increased significantly, by 61.29%, 69.49%, and 89.15%, respectively. These results suggest that evident aging of microplastics in natural aquatic environments releases significant amounts of dissolved organic matter, and the ecological effects of this should be the subject of future research.
More Papers Like This
Abiotic Hydrolysis of Microplastics: Influence of Polymer Chain Scission on Particle Fragmentation and Dissolved Organic Carbon Release
AI summary Read the abstract
Researchers exposed five polymer types — including PLA, PA-6, TPU, PP, and LDPE — to hydrolytic aging across temperatures and pH levels and found that degradation generates both microplastics via surface cracking and nanoplastics via particle erosion, with polymer chemistry governing how much dissolved organic carbon is released and over what timeframe.
Characterization of microplastic-derived dissolved organic matter in freshwater: Effects of light irradiation and polymer types
AI summary Read the abstract
Researchers examined how different types of microplastics release dissolved organic matter into freshwater under light and dark conditions. They found that polypropylene released the most organic compounds after UV exposure, while protein-like substances were the main material released by most plastics in the dark. The study indicates that microplastics may have ongoing, long-term effects on water chemistry and microbial activity in natural water bodies.
Microplastic-Derived Dissolved Organic Matter: Release Pattern, Chemical Properties, Environmental Risk, and Impact on Carbon Cycling
AI summary Read the abstract
This review examines microplastic-derived dissolved organic matter (MPs-DOM), which plastic debris releases at an estimated 23,600 tons annually into surface waters, covering its chemical properties, release patterns, and interactions with metals, microorganisms, and the carbon cycle. MPs-DOM represents a largely overlooked secondary pollution pathway through which microplastics extend their environmental impact well beyond the particles themselves.
Advancing understanding of microplastics-derived dissolved organic matter release: From source-dependent behavior to micro-interfacial processes
AI summary Read the abstract
Researchers compared dissolved organic matter released by microplastics from river-collected versus newly purchased plastics under UV aging, finding that environmentally pre-aged plastics released chemically more oxidized DOM while fresh plastics preferentially shed higher-molecular-weight, aromatic humic-like compounds — with salinity amplifying these source-dependent differences in seawater conditions.
Microplastic-derived dissolved organic matter and its biogeochemical behaviors in aquatic environments: A review
AI summary Read the abstract
This review examines how microplastics release dissolved organic matter (MP-DOM) as they break down in water, and how these released chemicals affect water ecosystems. MP-DOM can interact with other pollutants and alter carbon cycling in natural waters, with the type and amount varying based on plastic composition and weathering conditions. Understanding what microplastics release into water as they degrade is important because these dissolved chemicals may have their own toxic effects on aquatic life and water quality.
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.