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61,005 resultsShowing papers similar to Microplastic pollution characteristics and ecological risk assessment in the Wuding River Basin, China
Clear[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.
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.
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, 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.
[Microplastic Pollution Status and Ecological Risk Evaluation in Weihe River].
This Chinese study characterized microplastic abundance, shapes, sizes, colors, and polymer types in the Weihe River in northwest China. The findings document significant microplastic contamination in a major regional river that drains one of China's most densely populated agricultural areas, raising concerns about both ecosystem and human health.
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.
Distribution of microplastic contamination in the major tributaries of the Yellow River on the Loess Plateau
Researchers investigated microplastic distribution across 96 sampling sites in three major tributaries of the Yellow River on the Loess Plateau, finding that microplastic abundance and characteristics differed among tributaries based on land use and human activity. The study identified environmental factors driving microplastic contamination patterns in these river systems.
Microplastic pollution in Chinese Rivers: A detailed analysis of distribution, risk factors, and ecological impact
Researchers aggregated data from 2,474 microplastic samples across 165 publications to assess ecological risk in Chinese rivers, finding widespread contamination with average abundance varying substantially by watershed characteristics. A revised risk assessment accounting for particle morphology and polymer toxicity raised concern levels beyond previous estimates.
Temporal and spatial variation of microplastics in Baotou section of Yellow River, China
This study tracked microplastic contamination in the Yellow River near Baotou, China, across different seasons and locations, sampling surface water, sediment, and nearby soil. Researchers found microplastics everywhere they looked, with fibers being the dominant type and concentrations varying by season and proximity to urban areas. The findings highlight that major rivers can serve as pathways carrying land-based microplastic pollution toward the ocean.
[Distribution, Sources, and Risk Assessment of Microplastics in Surface Sediments of Yellow River Delta Wetland].
Researchers surveyed microplastic pollution in surface sediments of the Yellow River Delta wetland and found concentrations ranging from 20 to 520 particles per kilogram, primarily consisting of fibers. The dominant polymer types included rayon, polyethylene, polyester, and PET, with most particles larger than 1 mm. Pollution index assessments indicated the wetland was at a slightly polluted level with relatively low ecological risk overall.
The pollution of microplastics in sediments of the Yangtze River Basin: Occurrence, distribution characteristics, and basin-scale multilevel ecological risk assessment
This study mapped microplastic pollution throughout the Yangtze River Basin in China and found an average of 611 particles per kilogram of sediment, with wide variation across locations. Smaller microplastics under 1 millimeter and fibrous shapes were most common, and contamination was closely linked to population density and human activities. The findings are concerning because the Yangtze River system provides drinking water and food resources to hundreds of millions of people.
Microplastic pollution in the Yangtze River Basin: Heterogeneity of abundances and characteristics in different environments
Researchers compiled microplastic data from 624 sampling sites across the Yangtze River Basin covering water, sediment, soil, and biota, revealing heterogeneous contamination patterns driven by local land use, population density, and wastewater infrastructure.
[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.
[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.
Identifying the characteristics of and factors driving spatiotemporal water quality variations in the Yellow River Basin, China, from 2008 to 2020
This study analyzed water quality data from the Yellow River Basin in China from 2008 to 2020, identifying pollution sources and spatial trends across the watershed. While focused on general water quality rather than microplastics specifically, such assessments provide important context for understanding pollution dynamics in large river systems.
The occurrence and abundance of microplastics in surface water and sediment of the West River downstream, in the south of China
Researchers surveyed microplastic contamination in surface water and sediment of the West River downstream in southern China. They found microplastics in all samples, with concentrations ranging widely and fibers being the dominant shape. The study suggests that the downstream section of the West River serves as both a conduit and accumulation zone for microplastic pollution heading toward coastal waters.
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.
Occurrence of microplastics pollution in the Yangtze River: Distinct characteristics of spatial distribution and basin-wide ecological risk assessment
Researchers analyzed microplastic pollution across the entire Yangtze River basin, compiling data from the headwaters to the estuary to create a comprehensive picture of contamination. They found distinct spatial distribution patterns, with higher concentrations in urban and industrialized stretches of the river. The study also conducted a basin-wide ecological risk assessment, finding moderate to high risk levels in several sections.
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.
[Pollution Characteristics and Ecological Risk Assessment of Microplastics in the Yangtze River Basin].
A comprehensive survey of the Yangtze River basin — the longest river in China — found microplastics at abundances ranging from 21 to over 44,000 particles per cubic meter, with the highest concentrations in urban tributary areas like Chengdu. Fibers and fragments under 1 mm were most common, and statistical analysis linked microplastic abundance strongly to vehicle ownership and tourism activity. The study found that roughly 69% of sampled areas fall within elevated ecological risk categories, with Taihu Lake identified as a particular hotspot.
[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.
Microplastics in inland freshwater environments with different regional functions: A case study on the Chengdu Plain
Researchers surveyed microplastic pollution in the Minjiang River as it flows through the Chengdu Plain in China, examining abundance, composition, shape, and size in both water and sediments. The study found serious microplastic contamination in urban sections of the river, with differences linked to regional functions such as industrial, agricultural, and residential land use patterns.