We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Papers
61,005 resultsShowing papers similar to Assessment of Microplastic Degradation in Bottom Sediments Using Raman Microspectroscopy and Atomic Force Microscopy
ClearAssessment of Microplastic Degradation in Bottom Sediments Using Raman Microspectroscopy and Atomic Force Microscopy
Researchers assessed the degree of degradation of polyethylene terephthalate (PET) microplastics recovered from bottom sediments of four remote ocean and sea locations (Laptev Sea, Weddell Sea, Chukchi Sea, and Sea of Japan) using Raman microspectroscopy and atomic force microscopy. PET in Laptev Sea sediments showed the highest degradation level, with changes in crystallinity and surface topography correlated to local environmental conditions.
Prevalence of small-sized microplastics in coastal sediments detected by multipoint confocal micro-Raman spectrum scanning
Researchers developed a new micro-Raman spectrum scanning method to detect small-sized microplastics in coastal sediments, revealing that particles under 50 micrometers are the most prevalent and commonly overlooked by standard techniques.
An approach for extraction, characterization and quantitation of microplastic in natural marine snow using Raman microscopy
This study demonstrated that marine snow — the organic aggregates that sink continuously through the ocean — incorporates microplastics and transports them toward the seafloor. The finding identifies biological particle aggregation as an important mechanism for removing microplastics from the upper ocean and depositing them in deep-sea sediments.
Study on Rapid Recognition of Marine Microplastics Based on Raman Spectroscopy
Researchers developed a rapid identification system for marine microplastics using Raman spectroscopy, enabling quick determination of plastic type and size. Fast, accurate identification tools are critical for monitoring the growing problem of microplastic pollution in ocean environments.
Characterization of Microplastics by Advanced Analytical Techniques
Researchers applied advanced analytical techniques — including Raman spectroscopy, synchrotron infrared spectroscopy, transmission electron microscopy, synchrotron X-ray diffraction, and nanoindentation — to characterize the structure and properties of polyolefin microplastics collected from Japanese coastal waters, elucidating mechanisms of formation, photo-oxidative degradation, and fragmentation.
The Raman Spectroscopy Approach to Different Freshwater Microplastics and Quantitative Characterization of Polyethylene Aged in the Environment
Researchers used Raman spectroscopy to identify and characterize microplastics from multiple freshwater sites feeding the Baltic Sea, finding polypropylene, polyethylene, polycarbonate, and polystyrene as the most common polymer types. The study also demonstrated that Raman spectra can provide quantitative information on the crystallinity and density of aged polyethylene, enabling assessment of environmental weathering.
Nanoscale Infrared Spectroscopy Reveals Nanoplastics at 5000 m Depth in the South Atlantic Ocean
Researchers used nanoscale infrared spectroscopy combined with atomic force microscopy to identify individual nanoplastic particles in deep-sea water samples from 5,000 meters depth in the South Atlantic Ocean. This is the first demonstration that nanoplastics have reached the deep ocean floor, showing that plastic pollution has penetrated even the most remote marine environments.
Research Gaps in the Study of Microplastics: Method Development for Raman Automation, and Examining Relationships between Ecological Traits and Anthropogenic Particle Ingestion in a Deep-sea Food Web
This research addressed two gaps in microplastic science: developing more efficient automated identification methods using Raman spectroscopy, and studying how microplastics move through deep-sea food webs. The work advances tools and knowledge needed to track plastic pollution in remote ocean environments.
Microplastic pellets in Arctic marine sediments: a common source or a common process?
Researchers examined microplastic pellet contamination in Arctic marine sediments to understand whether their presence reflects common sources or shared degradation processes. The study found that microplastics are accumulating on the Arctic seafloor, contributing to growing evidence that plastic pollution reaches even the most remote ocean environments.
Detection and analysis of microplastics in offshore sediment by microscopic differential Raman spectroscopy
Researchers developed a rapid microplastic detection system combining fluorescence imaging, differential Raman spectroscopy, and confocal microscopic Raman technology using a dual 784/785 nm wavelength laser to overcome limitations of weak Raman signals and fluorescence interference, testing it on polycarbonate and high-density polyethylene particles in offshore sediments from Qingdao Shilaoren coastal waters.
Microplastics Identification in Remote Aquatic Environments Using Raman Spectroscopy: A Case Study for Mt. Tymfi's Alpine Lake
Researchers analyzed water from a remote alpine lake on Mt. Tymfi in Greece, a pristine environment with minimal human activity, and still found microplastics at a concentration of about 0.021 particles per liter. The most common types were polyethylene fragments and PET and nylon fibers, identified using Raman spectroscopy. The presence of microplastics even in such an isolated location underscores how far-reaching plastic pollution has become, likely transported by wind and atmospheric deposition.
Microplastic identification using Raman microsocpy
Researchers developed and implemented a Raman spectroscopy system for rapid detection and identification of microplastic particles on substrates. The system enables efficient chemical characterization of microplastics found across diverse environmental matrices including ocean, lakes, soil, beach sediment, and human blood.
How to Identify and Quantify Microplastics and Nanoplastics Using Raman Imaging?
This paper reviews advances in Raman imaging as a method for identifying and quantifying microplastics and nanoplastics in environmental samples, discussing current protocols, analytical challenges, and the need for standardization.
Detection and characterisation of microplastics in lake sediments: A study in the Zagreb region
Researchers analyzed the presence, types, and quantities of microplastics in sediments from four lakes in the Zagreb region of Croatia using density separation and micro-Raman spectroscopy, finding that polystyrene, polyethylene, and polyethylene terephthalate were the predominant polymer types.
Analysis of composite microplastics in sediment using 3D Raman spectroscopy and imaging method
Researchers developed an advanced 3D Raman spectroscopy and imaging method to identify composite microplastics in environmental sediment samples, overcoming the limitations of traditional 2D methods that reduce reliability when analyzing multi-layered plastic products.
Insights into the degradation mechanism of PET and PP under marine conditions using FTIR
Researchers investigated the natural degradation of polypropylene and polyethylene terephthalate plastics under real marine conditions using FTIR spectroscopy, providing insights into how these common plastics break down in ocean environments.
Molecular identification of polymers and anthropogenic particles extracted from oceanic water and fish stomach – A Raman micro-spectroscopy study
Researchers applied Raman micro-spectroscopy to identify plastic polymers in Pacific Ocean trawl samples and fish stomach contents, finding polyethylene and polypropylene as the dominant types while demonstrating that many particles visually suspected as plastic were actually non-polymer biological material — underscoring the necessity of chemical verification.
Characterization of Small Micro-and Nanoparticles in Antarctic Snow by Electron Microscopy and Raman Micro-Spectroscopy
Researchers used electron microscopy and Raman spectroscopy to characterize small micro- and nanoparticles in Antarctic snow, assessing the extent of anthropogenic contamination reaching this remote region. The study found particles attributable to both long-range atmospheric transport and local sources, including plastic-derived materials.
Identification of microplastics using Raman spectroscopy: Latest developments and future prospects
This review summarizes the latest advances in using Raman spectroscopy to identify microplastics in environmental samples, highlighting improvements in speed, sensitivity, and the ability to characterize plastic type and surface chemistry.
Microplastic pollution in deep-sea sediments
Researchers analyzed deep-sea sediment cores and found microplastics present at depth, providing early evidence that deep-sea sediments globally accumulate microplastic pollution far from coastlines and at the seafloor.
Identification of Microplastics Using a Custom Built Micro-Raman Spectrometer
Researchers built a custom micro-Raman spectrometer and demonstrated its use for identifying microplastic polymer types in environmental samples, achieving sensitive and specific polymer identification at particle sizes down to a few micrometers.
Fate of microplastics in deep-sea sediments and its influencing factors: Evidence from the Eastern Indian Ocean
Surface sediments from 26 sites in the deep basin of the Eastern Indian Ocean were analyzed for microplastics, finding concentrations ranging widely and influenced by water depth, distance from land, and ocean current patterns. The study extends deep-sea microplastic monitoring to the Indian Ocean and identifies oceanographic transport as a key control on plastic distribution.
Raman Imaging Spectroscopy: History, Fundamentals and Current Scenario of the Technique
This review covers the history and principles of Raman imaging spectroscopy, a technique increasingly used to identify and map the chemical composition of microplastics in environmental samples. The review provides technical context for one of the most important tools in microplastic analysis.
Unveiling the deep-sea microplastic Odyssey: Characteristics, distribution, and ecological implications in Pacific Ocean sediments
Researchers investigated microplastic contamination in deep-sea sediments from the Pacific Ocean at depths reaching nearly 7,000 meters. They found microplastics at every sampling site, predominantly polyester and rayon fibers, with the highest concentrations in the Western Pacific. The study highlights that microplastic pollution has reached some of the most remote deep-sea environments on Earth, raising concerns about its ecological impact.