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61,005 resultsShowing papers similar to [Distribution, Sources, and Risk Assessment of Microplastics in Surface Sediments of Yellow River Delta Wetland].
Clear[Microplastics pollution in the Yellow River basin: current status and control strategy].
This review summarizes microplastic contamination in the Yellow River basin, finding that pollution increases from upstream to downstream with the highest concentrations in the Yellow River Delta wetland, and that both sediment and surface water are impacted at levels posing risks to aquaculture and human health.
Occurrence and distribution of microplastics in the adjacent environment of Yellow River Delta, China
Researchers assessed microplastic pollution across water, sediment, and soil samples in the Yellow River Delta of China. The study found microplastic concentrations ranging from 0.5 to nearly 8 particles per liter in water and up to 4,200 particles per kilogram in sediments, with polyethylene and polypropylene being the most common polymer types, indicating widespread plastic contamination in this coastal environment.
Microplastics in Yellow River Delta wetland: Occurrence, characteristics, human influences, and marker
Microplastics were surveyed across different zones of the Yellow River Delta wetland with varying levels of human activity, finding widespread contamination even in protected areas with minimal human presence, with MP abundances ranging from 136 to 2060 items/kg. The study identifies direct human activities as a stronger driver of wetland microplastic contamination than tourism.
[Occurrence Characteristics and Ecological Risk Assessment of Microplastic Pollution in the Yellow River Basin].
Researchers examined the spatial distribution, composition characteristics, and ecological risks of microplastic pollution across the Yellow River Basin in China, assessing contamination levels in the nation's historically significant waterway system.
Distribution of microplastics in Lanzhou section of the Yellow River: Characteristics, ecological risk assessment, and factors analysis
Researchers surveyed microplastic contamination in surface water and sediments along the Lanzhou section of China's Yellow River. They found that most particles were small fibrous fragments of PET and polypropylene, with higher abundances during the dry season, and that human activity and weather patterns influenced microplastic distribution. Ecological risk assessments indicated the overall pollution level in this stretch of the river was relatively low.
Characterization and risk assessment of microplastics in shoreline sediments of the Yellow River Delta
Microplastics were characterized in shoreline sediments from the Yellow River Delta in northern China, with polyethylene and polypropylene fibres and fragments predominating. Source analysis linked MPs to agricultural activities, riverine transport, and fishing, while ecological risk assessment indicated moderate-to-high risk for the delta ecosystem.
Microplastic pollution in Yellow River: Current status and research progress of biotoxicological effects
A comprehensive assessment of microplastic pollution in China's Yellow River found average abundances of 5,358–654,000 items/m³ in water and 43.57–615 items/kg in sediment, with fibers dominant in water samples, and reviewed evidence of biotoxicity in fish, invertebrates, and microorganisms.
Microplastic pollution characteristics and ecological risk assessment in the Wuding River Basin, China
Researchers surveyed microplastic pollution in the Wuding River, a tributary of China's Yellow River, collecting samples from 19 sites across water and sediment. They found that microplastic abundance varied significantly across locations, with fibers being the dominant shape, and identified population density and land use as key factors influencing contamination levels. The ecological risk assessment indicated that certain areas of the basin face moderate to high risk from microplastic pollution.
Pollution characteristics and prospective risk of microplastics in the Zhengzhou section of Yellow River, China
Researchers analyzed microplastic pollution across fourteen sampling sites in the Zhengzhou section of the Yellow River in China. The study found microplastic concentrations ranging from 2.33 to 15.50 particles per liter, higher than other inland Chinese rivers, with fibers and fragments being the dominant types and polyethylene the most common polymer.
Distribution of microplastics in surface water of the lower Yellow River near estuary
Researchers characterized microplastics in surface water of the lower Yellow River near its estuary, finding that 93.12% were fibers, 87.94% were under 200 μm, and the main polymers were polyethylene, polypropylene, and polystyrene. The study provides baseline data on the types and distribution of microplastics entering the Bohai Sea from one of China's major rivers.
Distribution, sources and multi-dimensional environmental risk assessment of microplastics in soils and groundwater along the middle and lower reaches of the Yellow river
Researchers assessed microplastic contamination in both soil and groundwater along the middle and lower reaches of China's Yellow River. They found soil concentrations ranging from 426 to over 3,000 particles per kilogram, with fibers being the dominant shape in both soil and groundwater. A novel risk assessment approach revealed that while soil contamination was mostly moderate, nearly a quarter of groundwater samples reached high-risk levels.
Abundance, characteristics and ecological risks of microplastics from South Yellow Sea Mudflat
Researchers surveyed microplastic contamination in the mudflats of the South Yellow Sea and found plastic particles in both the water and sediment at all sampling locations. Areas near estuaries and ports had higher levels of microplastics in the water, while purely coastal mudflats accumulated more in their sediments. Although overall pollution levels were rated as low, the types of plastic polymers present indicated the potential for significant ecological risk.
[Occurrence Characteristic and Risk Assessment of Microplastics in Sishui River (Xingyang Section)].
Researchers characterized microplastics in water samples from sewage outlet sites along the Sishui River (Xingyang section), a Yellow River tributary, finding predominantly transparent fibers and fragments under 500 micrometers composed mainly of PET and PE polymers and conducting ecological risk assessment.
[Microplastic Pollution Characteristics and Ecological Environmental Risk Assessment in Water and Sediments of the Yiluo River Basin].
Microplastic pollution characteristics and associated ecological environmental risks were assessed in a specific aquatic or sediment environment, providing concentration data and risk indices. The study establishes a contamination baseline and identifies priority pollutant risks for the area studied.
Microplastic pollution in water and sediment in the Henan section of the Yellow River based on the MultiMP comprehensive evaluation method
Researchers surveyed microplastic pollution in the Henan section of the Yellow River, analyzing both surface water and sediment samples using the MultiMP risk assessment method. The study found microplastics throughout the river system, with fiber-shaped particles in the 25-150 micrometer range being most common, and the findings suggest moderate ecological risk that warrants continued monitoring.
Microplastic pollution in North Yellow Sea, China: Observations on occurrence, distribution and identification
Researchers surveyed microplastic pollution across the North Yellow Sea, documenting their occurrence, distribution, and characteristics, and finding widespread contamination with higher concentrations in coastal areas and near river inputs.
Microplastic pollution in the surface sediments collected from Sishili Bay, North Yellow Sea, China
Researchers investigated microplastic pollution in surface sediments from 28 stations in Sishili Bay in the North Yellow Sea, China, finding an average abundance of 499.76 items per kilogram dry weight with fibers dominating and eight polymer types identified including rayon and polyester.
Spatial distributions of macronutrients, heavy metals and microplastics in surface sediments of the mainstem and lakes in the middle part of the Yellow River Basin
Researchers mapped the distribution of macronutrients, heavy metals, and microplastics in sediments along the middle section of the Yellow River and adjacent lakes in China. They found that microplastic concentrations ranged from 233 to 3,333 items per kilogram in river sediments, with nylon as the dominant polymer type. Contamination levels increased significantly after the river flowed through intensive agricultural areas, with urban lakes showing the highest heavy metal concentrations.
[Distribution and Correlation Analysis of Microplastic Contamination in Bottom Mud of Zhengzhou Section of the Yellow River].
Researchers collected sediment samples from 18 sites along the Zhengzhou section of the Yellow River to investigate the distribution and characteristics of microplastic contamination, using stereomicroscopy and Fourier-transform infrared spectroscopy for quantitative and qualitative analysis. Pearson correlation analysis examined relationships between microplastic distribution and sediment physicochemical properties, with diversity indices applied to characterise the contamination patterns across the sampling sites.
Abundance, characteristics and risk assessment of microplastics in aquatic sediments: A comparative study in the Yellow River and Yellow Sea
Researchers compared microplastic contamination in sediments from the Yellow River and Yellow Sea using laser direct infrared imaging. The study found that microplastic abundance in Yellow Sea sediment was 2.9 times higher than in the Yellow River, with particles smaller than 100 micrometers accounting for over 90% of the total. Risk assessment indicated that all sampled environments exhibited high ecological risk, highlighting the importance of high-resolution detection methods.
Microplastic pollution in sediments from the Bohai Sea and the Yellow Sea, China
Researchers sampled sediments from the Bohai Sea and Yellow Sea and found widespread microplastic contamination, with fibers and fragments as the dominant forms, and higher concentrations near river mouths and urban coastlines.
High levels of microplastic pollution in the sediments and benthic organisms of the South Yellow Sea, China
High concentrations of microplastics were found in both sediments and benthic organisms from the South Yellow Sea, with fibers as the dominant type and polymer compositions reflecting regional land-based and marine sources. The study identifies benthic ecosystems of the South Yellow Sea as significantly impacted by microplastic pollution, with potential risks to bottom-dwelling communities.
Occurrence and ecological risk of microplastics in soils and sediments in the Inner Mongolian Yellow River Basin: An analysis based on functional zoning
Researchers analyzed microplastic pollution across 34 soil and sediment samples from the Inner Mongolian Yellow River Basin, finding widespread contamination with a mean abundance of 5,503 items/kg in soils and 2,059 items/kg in sediments, dominated by transparent polypropylene and polyethylene fibers. Sewage outlets and industrial areas were identified as major microplastic sinks in soil, with the highest sediment contamination near Hohhot.
Distribution, Sources, and Ecological Risk Assessment of Microplastics in the Lower Minjiang River
Researchers characterized microplastic abundance, morphology, and polymer composition in surface water and sediments from the lower Minjiang River in China, then used pollution load indices and ecological risk assessments alongside socioeconomic data to identify likely pollution sources and ecological impacts.