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61,005 resultsShowing papers similar to Small microplastic particles dominate Yangtze River particulate pollution
ClearSmall microplastic particles dominate Yangtze River particulate pollution
Annual field monitoring of microplastic fluxes in the Yangtze River estuary found that small particles dominated the plastic load and that abundance was spatially and temporally heterogeneous, providing the first systematic estimate of the river's annual plastic contribution to the ocean.
Seasonal dynamics, tidal influences, and anthropogenic impacts on microplastic distribution in the Yangtze River estuary: A comprehensive characterization and comparative analysis
Researchers studied microplastic pollution in the Yangtze River estuary and found average concentrations of about 1 particle per cubic meter of surface water, mostly polystyrene, polypropylene, and polyethylene. Microplastic levels were nearly twice as high during flood season compared to dry season and decreased with distance from urban centers. These findings highlight how population density and seasonal water flow influence microplastic distribution in major waterways.
Analysis of suspended microplastics in the Changjiang Estuary: Implications for riverine plastic load to the ocean
Suspended microplastics were measured in the Changjiang (Yangtze) River Estuary, one of the world's largest rivers, to estimate its total plastic load delivered to the East China Sea. The study found substantial and highly variable microplastic concentrations that, when scaled to river discharge, suggest the Yangtze contributes a significant fraction of total global riverine plastic input to the ocean.
Occurrence and fate of microplastic debris in middle and lower reaches of the Yangtze River – From inland to the sea
A large-scale survey along the middle and lower Yangtze River found microplastics throughout the water column and sediments, with concentrations increasing toward the river mouth and a clear trend of microplastics moving from inland sources toward the sea. The study provides field evidence for rivers as major pathways for microplastic transport from land to ocean.
Riverine emission of small plastic particles from Yangtze River into the ocean
Researchers measured microplastic particle flows in the Yangtze River over a full year, estimating that roughly 5.2 quadrillion plastic particles enter the ocean annually from this single river, with nearly three-quarters being tiny particles that are the most likely to be swallowed by marine life. Microplastic levels were highest near the surface and dropped with water depth, while river flow rate controlled how many particles were present at any given time.
Suspended microplastics in the surface water of the Yangtze Estuary System, China: First observations on occurrence, distribution
Researchers measured suspended microplastic concentrations in surface water across the Yangtze Estuary system in China, finding spatial gradients that reflected inputs from the Yangtze River and local coastal sources.
Environmental fate of microplastics in the world's third-largest river: Basin-wide investigation and microplastic community analysis
Researchers conducted a basin-wide investigation of microplastics throughout the entire Yangtze River system, sampling water, sediment, and soil. The study found microplastics in all samples with abundance increasing from upstream to downstream, driven by both geographical and human factors, with major cities at the middle and lower reaches identified as key pollution nodes.
Dynamic signatures of microplastic distribution across the water column of Yangtze River Estuary: Complicated implication of tidal effects
Seasonal sampling of microplastic concentrations throughout the Yangtze River Estuary water column found tidal dynamics strongly influenced distribution, with researchers developing a model estimating 2154 tons per year of microplastic flux into the East China Sea and a tide impact factor index of 38-58%.
How the Yangtze River transports microplastic to the east China sea
Researchers used interpolation and input-output modeling to estimate how the Yangtze River transports microplastics seasonally from land to the East China Sea, finding that MP loads varied substantially by month with peak transport during high-flow periods. Tributary contributions and agricultural runoff were identified as major factors controlling MP flux to the estuary.
Microplastic pollution in the Yangtze River: Characterization, influencing factors, and scenario-based predictions using machine learning method
Microplastic pollution in the Yangtze River was characterized across multiple sampling sites, documenting spatial patterns in particle abundance, polymer types, and size distributions. As one of the world's largest rivers, the Yangtze's microplastic burden has major implications for plastic delivery to the Pacific Ocean.
Distribution Characteristics of Microplastics in Surface Seawater off the Yangtze River Estuary Section and Analysis of Ecological Risk Assessment
Researchers surveyed microplastic contamination in surface seawater near the Yangtze River estuary across four seasons in 2017 and 2019. They found microplastics at all sampling stations, with abundance varying by season and influenced by river discharge and ocean currents. The study provides baseline data on microplastic pollution levels in this ecologically important estuarine region of China.
Characteristics and Distribution of Microplastics in Shoreline Sediments of the Yangtze River, Main Tributaries and Lakes in China—From Upper Reaches to the Estuary
Scientists measured microplastic concentrations in sediments along 54 sites spanning the Yangtze River system in China, from the upper reaches to the estuary. Microplastics were found throughout, with higher concentrations near urban and industrial areas, showing how large rivers distribute plastic pollution across vast distances.
Microplastics in Surface Water in the Yangtze River, China: Basin-Wide Observation, Multiple Ecological Risk Assessment and Sustainability
Researchers conducted a three-year survey of microplastic pollution across the entire Yangtze River Basin in China and found an average of nearly 8,800 microplastic particles per cubic meter of surface water. Tiny particles smaller than 0.3 millimeters made up over 92% of what was found and drove the variation in pollution levels between locations. The study highlights that previous research may have significantly underestimated microplastic contamination by not capturing these smallest particles.
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.
A catchment-wide microplastic pollution investigation of the Yangtze River: The pollution and ecological risk of tributaries are non-negligible
Researchers conducted a large-scale survey of microplastic pollution across the entire Yangtze River catchment, including both the main river and its tributaries. They found that tributaries contributed significantly to the overall microplastic load and posed ecological risks that had been previously overlooked. The study emphasizes that effective pollution management for major river systems must account for contamination flowing in from smaller waterways.
[Distribution and Settlement of Microplastics in the Surface Sediment of Yangtze Estuary].
Researchers found microplastics in surface sediments at six sites in China's Yangtze River estuary, with concentrations varying by location and season. The study documents significant plastic contamination in this major coastal zone, raising concerns about ecosystem health and entry of microplastics into the marine food web.
The fate of microplastics in estuary: A quantitative simulation approach
Researchers applied quantitative numerical simulation to model microplastic transport and concentration distribution in the Yangtze Estuary, one of the world's largest plastic export pathways. The model used a mass-number method to estimate spatial distribution and risk levels of microplastics in February and May, revealing seasonal variation in transport patterns.
Distribution, characteristics, and research status of microplastics in the trunk stream and main lakes of the Yangtze River: A review
This review synthesizes research on microplastic distribution, characteristics, and sources in the Yangtze River trunk stream and its major lakes, identifying industrial discharges, urban runoff, and agricultural films as dominant pollution sources affecting one of the world's most populated river basins.
Occurrence and characteristics of microplastics across the watershed of the world’s third-largest river
Researchers conducted a large-scale survey of microplastic pollution across the entire Yangtze River watershed, the world's third-largest river. They found microplastics throughout the river system, with concentrations decreasing from upstream to downstream, and fiber-shaped particles smaller than 1 mm being most common. The study provides important baseline data showing that even remote upstream areas of major river systems carry significant microplastic contamination.
Microplastics in sediments of the Changjiang Estuary, China
Researchers sampled sediments in the Changjiang Estuary and found microplastics throughout, with concentrations and polymer types reflecting inputs from the Yangtze River and coastal human activities.
Shape- and polymer-considered simulation to unravel the estuarine microplastics fate
Using a shape- and polymer-specific simulation model of the Yangtze River Estuary — the world's largest plastic contributor to the ocean — researchers estimated that approximately 9,766 kg of microplastics pass through the surface layer per month during peak input periods. The study also showed that resuspension of microplastics from intertidal zones significantly affects transport estimates, and introduced a new risk index that factors in particle shape, abundance, and polymer type to better identify estuarine hotspots where removal interventions could be most effective.
Microplastics in Pearl River Estuary and Yangtze River Estuary, China: Occurrence, fragmentation and pollution risk
Researchers compared microplastic pollution in the Pearl River Estuary and Yangtze River Estuary in China using identical sampling and analysis methods. The Yangtze River Estuary had nearly ten times more microplastics, dominated by polypropylene and polyethylene fragments, with higher levels of particle fragmentation suggesting more advanced degradation. Both estuaries were primarily contaminated with small microplastics under 300 micrometers, indicating these important waterways are transporting substantial quantities of tiny plastic particles to the ocean.
Navigating the difference of riverine microplastic movement footprint into the sea: Particle properties influence
Researchers mapped how different types of microplastic particles move from the Yangtze River into the sea based on their size, shape, and polymer type. They found that particle properties strongly influence transport patterns, with lighter and smaller particles traveling farther into the ocean while heavier ones settle near the estuary. The study provides a framework for predicting where different microplastics end up after leaving river systems.
Characteristics and distribution of microplastics in shoreline sediments of the Yangtze River, main tributaries and lakes in China—From upper reaches to the estuary
Microplastic concentrations were measured in shoreline sediments from 54 sites along the Yangtze River, its tributaries, and adjoining lakes from the upper reaches to the estuary, revealing widespread contamination that generally increased toward the more urbanized lower river. The study provides one of the most spatially comprehensive surveys of Yangtze River microplastic pollution to date.