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61,005 resultsShowing papers similar to Detection of small microplastics in the surface freshwater samples of Yangcheng Lake, China
ClearMeasuring Microplastic Transport In Lakes: A Methodological Approach
Researchers investigated microplastic transport dynamics in Dianchi Lake in Yunnan, China, using Raman-Microscope and scanning electron microscopy to examine samples from various lake locations and depths. They found microplastic particles substantially smaller than previously reported in a large number of samples, with the Raman-Microscope enabling detection of very fine particles, and analyzed transport mechanisms by which UV-degraded microplastics are carried across long distances by rain and wind.
Plasmonic nanostructures for environmental monitoring and/or biological applications
This study used optical tweezer micro-Raman spectroscopy to identify and size-classify microplastics from a Chinese lake, and developed a plasmonic nanostructure system for detecting nanoplastics. Better detection tools for both micro- and nano-scale plastic particles are essential for accurately assessing environmental contamination and human exposure.
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 small microplastics in coastal surface water samples of the subtropical island of Okinawa, Japan
Using optical Raman tweezers on marine aggregates from coastal Okinawa waters, researchers identified small microplastics (down to 1 µm) by chemical composition, finding that low-density polyethylene accounted for 75% of identified particles — the smallest microplastics detected in any marine surface water sample at the time.
Unmasking Microplastic Pollution: A Study on the Distribution and Impact of Microplastics in Yuehai Lake, China
This study surveyed microplastic characteristics and distribution across water samples from Yuehai Lake in China, finding widespread contamination with fragments and fibers, and identifying local anthropogenic activities and atmospheric deposition as primary sources.
Microplastics in Taihu Lake, China
Researchers surveyed Taihu Lake in China — one of the largest freshwater lakes in the country — and found microplastics throughout, with concentrations and polymer composition reflecting surrounding urban and industrial inputs.
Occurrence and distribution of microplastics in China’s largest freshwater lake system
Researchers found high levels of microplastics in both water and sediment across China's largest freshwater lake system, Poyang Lake, with concentrations up to 1,064 particles per cubic meter in water. The study reveals widespread contamination even in protected nature reserves, emphasizing the scale of the freshwater microplastics problem.
Detection and analysis of microplastics in the subtropical ocean of Okinawa using micro-Raman Optical Tweezers
Micro-Raman optical tweezers were used to isolate and identify individual microplastic particles from seawater samples collected off Okinawa, demonstrating that this single-particle technique can characterize polymer composition of very small particles that are difficult to detect with conventional methods.
Distribution and characteristics of microplastics in the sediments of Poyang Lake, China
Researchers found microplastic contamination in sediments across Poyang Lake, China, with abundances ranging from 11 to 3,153 items per kilogram dry weight, and identified significant spatial variability linked to human activity and hydrological conditions.
Spatial and temporal distribution characteristics of microplastics in surface water of typical shallow lake in the middle and lower reaches of Yangtze River: A case study of Lake Baoan, Hubei Province
A seasonal sampling campaign at Lake Baoan, a shallow Yangtze River basin lake in China, found an average microplastic abundance of about 16 particles per litre in surface water, with fibers making up 40% of particles and polyethylene the dominant polymer. Microplastic concentrations peaked in winter and were lowest in summer, but showed no significant correlation with conventional water-quality indicators — suggesting that standard water-quality monitoring will miss microplastic contamination.
Detection and characterisation of microplastics in lake sediments: A study in the Zagreb region
Researchers analyzed microplastics in sediment samples from four lakes in the Zagreb region of Croatia using density separation with zinc chloride and micro-Raman spectroscopy with a mapping function to quantify and characterize particles. They found microplastics in all lake sediments at concentrations between 113,000 and 764,000 particles per kg of sediment, with polystyrene, polyethylene, polyethylene terephthalate, polypropylene, and nylon as predominant polymers and the majority of particles in the 5 to 10 micrometer size range.
Raman spectroscopy for microplastic detection in water sources: a systematic review
This systematic review summarizes how Raman spectroscopy, a type of light-based analysis, is used to identify microplastics in drinking water, oceans, and wastewater. Polystyrene, polyethylene, and polypropylene were among the most commonly detected plastics across all water sources. Better detection methods like this are essential for understanding the extent of microplastic contamination in the water we drink.
Microplastic abundance, distribution and composition in water, sediments, and wild fish from Poyang Lake, China
Microplastics were measured in surface water, sediments, and fish (crucian carp) across Poyang Lake, China's largest freshwater lake, finding 5–34 items/L in water, 54–506 items/kg in sediments, and 0–18 items per fish, with heterogeneous spatial distribution related to anthropogenic and topographic factors. The study provides comprehensive multi-compartment baseline data on microplastic contamination in a major Chinese freshwater ecosystem.
Microplastics in surface waters of Dongting Lake and Hong Lake, China
Researchers sampled surface waters of Dongting Lake and Hong Lake in China and found microplastic contamination at both sites, with fibers as the dominant type and concentrations reflecting nearby human population density and land use.
Pollution status of microplastics in the freshwater environment of China: a mini review
This review assessed microplastic pollution in China's freshwater environments including rivers, lakes, and reservoirs, finding widespread contamination in surface waters, sediments, and biota with variations linked to population density and industrial activity.
Full size microplastics in crab and fish collected from the mangrove wetland of Beibu Gulf: Evidences from Raman Tweezers (1–20 μm) and spectroscopy (20–5000 μm)
Researchers combined Raman Tweezers (for particles 1-20 µm) and conventional Raman spectroscopy (for 20-5000 µm) to characterise the full size spectrum of microplastics in crab and fish from the Beibu Gulf mangrove wetland in China. They found that small microplastics (1-20 µm) comprised 35.77% of total particle counts, and that excluding this size fraction introduces large underestimates of total microplastic burden in marine organisms.
Improved Reliability of Raman Spectroscopic Imaging of Low-Micrometer Microplastic Mixtures in Lake Water by Fractionated Membrane Filtration
Researchers developed an analytical method coupling fractionated membrane filtration with Raman microspectroscopy to reliably quantify low-micrometer microplastics (1-10 micrometers) in lake water, achieving over 90% recovery of polystyrene and PMMA particles and improving image quality by separating particles into distinct size fractions.
[Occurrence Characteristics of Microplastics in Baiyangdian Lake Water and Sediments].
This study measured microplastic abundance and characteristics in both the water and bottom sediments of Baiyangdian Lake in China, finding average concentrations of about 6,255 particles per cubic meter in surface water and 11,088 particles per kilogram in sediments. The dominant polymer in water was PET, while sediments were dominated by chlorinated polyethylene, and larger particles settled faster according to Stokes' law calculations. The results suggest textile washing wastewater and wear from boats and buildings are key local pollution sources, with important implications for understanding contamination of this important freshwater ecosystem.
Microplastics in Sediment and Surface Water of West Dongting Lake and South Dongting Lake: Abundance, Source and Composition
Microplastics were found in both surface water and sediments of West Dongting Lake and South Dongting Lake in China, with fibers and fragments as the dominant types and concentrations influenced by proximity to urban and agricultural land use. The study provides the first data on microplastic contamination in China's second-largest freshwater lake system.
Quantitative characteristics and multiple probabilistic risk assessment of small-sized microplastics in the middle and lower reaches of the Hanjiang River, China
Scientists used advanced laser imaging technology to measure small microplastics (20-500 micrometers) in the middle and lower reaches of China's Hanjiang River, finding average concentrations of over 7,200 particles per liter. These concentrations were far higher than what traditional detection methods typically report, suggesting that small microplastics are substantially underestimated in most surveys. Risk assessment indicated that polycarbonate and polyamide particles posed the greatest ecological threat in this freshwater system.
Distribution Characteristics and Source Analysis of Microplastics in Urban Freshwater Lakes: A Case Study in Songshan Lake of Dongguan, China
Researchers found microplastics in both surface water and sediments of Songshan Lake, an urban freshwater lake in China, identifying fiber shapes as dominant and using principal component analysis to trace sources including atmospheric deposition, runoff, and recreational activities.
Investigation on microplastic pollution of Dongting Lake and its affiliated rivers
Researchers surveyed microplastic contamination in Dongting Lake and its affiliated rivers in China, collecting 15 surface water and 15 sediment samples from across the lake district and finding microplastic abundances of 0.62-4.31 items/m3 in water and 21-52 items/100 g dry weight in sediments. Fibers dominated and the results indicate the lake system is a significant microplastic sink fed by surrounding river networks.
Comprehensive analysis of microplastics in water, sediment and fish from a large recreational lake
Researchers surveyed microplastics in water, sediment, and fish from a large recreational lake in China, finding MPs across all sampled compartments with higher concentrations near tourist facilities and boat launch areas, raising concerns about human exposure through lake recreation and consumption of contaminated fish.
Microplastics in the surface water of Wuliangsuhai Lake, northern China
Microplastics were detected in Wuliangsuhai Lake in Inner Mongolia, one of China's largest lakes, at concentrations of 3 to 11 particles per liter, with fibers most abundant and small particles under 2 mm making up 98% of the total. Agricultural wastewater, domestic sewage, and fishery discharges were identified as the main sources of contamination.