We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Novel insight into the aging process of microplastics: An in-situ study in coastal wetlands
AI summary Read the abstract
Scientists tracked how microplastics age and break down in a coastal wetland in China over three months and found that both sunlight and microbial communities work together to degrade the plastic surfaces. Different plastic types broke down at very different rates, with estimated lifespans ranging from 335 to 661 days before significant degradation. This research helps predict how long microplastics persist in coastal environments that are important for fisheries and human food sources.
Coastal wetlands, the critical interface between the terrestrial and marine environments, provide a dynamic and unique environment for the aging of microplastics (MPs). Nevertheless, both abiotic and biotic processes that contribute to the aging of MPs in coastal wetlands have been largely neglected. In this study, the aging of MPs was continuously characterized in Hangzhou Bay, a representative coastal wetland in Zhejiang, China. Three-month exposure of polymers in sediment-water interface induced the aging phenomenon with embrittlement and exfoliation, as evidenced by simultaneous observed alternations in crystallinity and functional groups. A first-order kinetic model was fitted to describe the rate and degree of aging quantitatively. As evidenced by the carbonyl index, the residence time of all the examined MPs exhibited significant variance, ranging from 335 to 661 days. These variations might be caused by the selective attachment of plastic-degrading microorganisms (such as Moraxella sp. and Rhodococcus sp.). A positive correlation between the carbonyl index, the number of OTUs in the MP-associated biofilm, and irradiation was observed (p < 0.001), suggesting that the aging process may be co-regulated by natural sunlight and wetland microbial colonization. This study sheds new light on the long-term environmental fate of MPs and their associated ecological risks.
More Papers Like This
Comprehensive Understanding on the Aging Process and Mechanism of Microplastics in the Sediment–Water Interface: Untangling the Role of Photoaging and Biodegradation
AI summary Read the abstract
Researchers examined how microplastics break down at the boundary between water and sediment in coastal wetlands, comparing the roles of sunlight-driven aging and biological degradation. They found that photoaging was the dominant process, accounting for over 55% of surface changes, and that biodegradable plastics aged faster than conventional ones. The study provides important insights into how microplastics transform in real-world coastal environments.
Surface properties and changes in morphology of microplastics exposed in-situ to Chinese coastal wetlands
AI summary Read the abstract
This study examined how microplastics change physically and chemically after being exposed in real coastal wetland environments, finding significant surface oxidation and biofouling after 90 days. Understanding how plastic particles age in natural settings is important because weathered microplastics may behave differently in organisms compared to pristine particles used in lab studies.
Weathering Processand Characteristics of Microplasticsin Coastal Wetlands: A 24-Month In Situ Study
AI summary Read the abstract
Researchers conducted a 24-month study of microplastic weathering in coastal wetlands, characterizing how wetland-specific conditions including UV exposure, salinity, and biological activity alter plastic surface chemistry, fragmentation, and biofilm colonization over time.
Aging of Microplastics across a Constructed Wetland
AI summary Read the abstract
Researchers studied the weathering and microbial colonization of five microplastic polymer types over 18 months within four habitat zones of a constructed wastewater wetland, finding that microorganisms colonized plastics rapidly and that weathering rates varied by polymer type and habitat.
Aging of Microplasticsacross a Constructed Wetland
AI summary Read the abstract
Researchers tracked the aging of five microplastic polymer types — LDPE, HDPE, polypropylene, polystyrene, and PET — across four habitats within a wastewater constructed wetland over 18 months, finding that physical, chemical, and biological processes jointly drive weathering and microorganism colonisation of plastics in these treatment systems.
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.