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61,005 resultsShowing papers similar to Characteristics and Influencing Factors of Spatial Differentiation of Urban Black and Odorous Waters in China
ClearMicroplastics discharged from urban drainage system: Prominent contribution of sewer overflow pollution
Researchers evaluated the abundance and distribution of microplastics in urban drainage systems in coastal Chinese cities, with a focus on sewer overflow events during storms. The study found that overflow pollution during wet weather is a prominent contributor to microplastic discharge into urban water bodies, with meteorological conditions and land use patterns significantly influencing microplastic transport and release.
Microplastic pollution in sophisticated urban river systems: Combined influence of land-use types and physicochemical characteristics
This study assessed microplastic pollution across an urban river network in China, finding that land-use type and water physicochemical properties jointly influence microplastic distribution, with industrial and residential areas contributing highest loads.
The occurrence of microplastics in water bodies in urban agglomerations: Impacts of drainage system overflow in wet weather, catchment land-uses, and environmental management practices
Microplastic concentrations in Shanghai urban waterways were six times higher during wet weather overflow events than from regular wastewater treatment plant discharges, and highest in industrial areas. The study highlights combined sewer overflow during rain events as a major but underappreciated pathway for microplastics entering city waterways.
Microplastics pollution in inland freshwaters of China: A case study in urban surface waters of Wuhan, China
Researchers characterized microplastic pollution in inland freshwaters across urban suburban areas of China, finding contamination that reflected land use intensity and population density in the surrounding catchments.
Characteristics and source-pathway of microplastics in freshwater system of China: A review
This national-scale review examines microplastic characteristics and source-pathway dynamics in Chinese freshwater systems including rivers, lakes, and reservoirs, synthesizing data showing that urban runoff, textile washing, and wastewater discharge are dominant sources. The authors identify key knowledge gaps in understanding microplastic transport from inland waters to the ocean in the world's largest plastic-producing country.
Coupled effects of urbanization level and dam on microplastics in surface waters in a coastal watershed of Southeast China
Researchers analyzed the distribution of microplastics across 17 sampling sites in the Minjiang River Watershed in southeast China, finding that microplastic concentrations were positively correlated with urbanization indicators and that dams influenced spatial distribution patterns.
Microplastic Pollution in China’s Aquatic Systems: Spatial Distribution, Transport Pathways, and Controlling Strategies
This review synthesizes recent findings on microplastic pollution across China's rivers, lakes, reservoirs, and coastal waters. Researchers found that contamination levels vary dramatically by location, with urban waterways showing the highest concentrations and polypropylene and polyethylene being the most common polymer types. The study identifies rivers as major transport pathways carrying microplastics from inland areas to the sea and evaluates strategies for reducing this pollution.
Temporal and Spatial Distribution Characteristics of Microplastics and Their Influencing Factors in the Lincheng River, Zhoushan City, China
Researchers analyzed temporal and spatial distribution patterns of microplastics in the Lincheng River in Zhoushan, China, finding that microplastic abundance is influenced by seasonal runoff, land use, and proximity to urban and industrial sources before entering the ocean.
Water Quality Evaluation, Spatial Distribution Characteristics, and Source Analysis of Pollutants in Wanquan River, China
This paper is not about microplastics — it assesses water quality in a Chinese river basin, finding that agricultural runoff and domestic sewage are the main pollution sources, without examining plastic contamination.
Source or sink role of an urban lake for microplastics from Guangdong-Hong Kong-Macao greater bay area, China
Researchers investigated whether an urban lake in the Guangdong-Hong Kong-Macao Greater Bay Area acts as a source or sink for microplastics, finding that urbanization-driven inputs and hydrological dynamics determine the lake's shifting role in microplastic cycling.
The urban microplastic footprint: investigating the distribution and transport
Researchers investigated the distribution and transport of microplastics within an urban environment, mapping the 'urban microplastic footprint' to understand how city infrastructure and land use patterns drive the spatial distribution and downstream export of plastic particles to receiving water bodies.
Fugitive release and influencing factors of microplastics in urbanized watersheds: A case study of the central area of Suzhou City
Researchers investigated fugitive release of microplastics in urbanized watersheds of Suzhou City, identifying key sources and factors influencing unorganized microplastic discharge from plastic manufacturing and daily use activities into urban waterways.
Distribution Characteristics of Microplastics in Domestic Sewage Waters: A Case Study in Guilin City, China
Researchers collected water samples from 20 sewage outlets in Guilin, China, to characterize microplastic abundance, morphology, and size distribution, and applied multivariate statistical analysis to identify hydrochemical factors influencing microplastic concentrations. The case study provides spatial data on domestic sewage as a microplastic source in a Chinese urban river system.
Polycyclic Aromatic Hydrocarbons in the Water Bodies of Dong Lake and Tangxun Lake, China: Spatial Distribution, Potential Sources and Risk Assessment
Researchers surveyed two of China's largest urban inland lakes for polycyclic aromatic hydrocarbon contamination and found these toxic compounds present in water samples from both lakes. Using source analysis models, they determined that the contamination primarily came from petroleum combustion and industrial activities in the surrounding urban areas. While focused on chemical pollutants rather than microplastics directly, the study illustrates how urban lakes accumulate multiple types of environmental contaminants simultaneously.
Microplastic pollution in urban rivers within China's Danxia landforms: Spatial distribution characteristics, migration, and risk assessment
Researchers surveyed microplastic contamination in surface water, sediment, and groundwater across six cities in China's ecologically fragile Danxia landform region. They found moderate levels of contamination, with urban wastewater and agricultural runoff identified as the primary sources. The study suggests that these unique and ecologically sensitive landscapes face real microplastic pollution risks tied to nearby human activity.
A systematic study of microplastic occurrence in urban water networks of a metropolis
A comprehensive study of microplastic occurrence across 66 sewage samples, 18 sludge samples, and 36 stormwater drain samples in Hong Kong found MPs throughout the urban water network in both dry and wet seasons. Stormwater drains were identified as a significant parallel pathway for MP discharge to coastal waters alongside conventional sewage treatment.
Distribution Patterns of Microplastics Pollution in Urban Fresh Waters: A Case Study of Rivers in Chengdu, China
Researchers surveyed microplastic pollution in urban rivers of Chengdu, China, finding concentrations of 5 to 10.5 items per liter, predominantly transparent fragments and fibers, with spatial distribution influenced by urbanization and wastewater discharge.
Interventions of river network structures on urban aquatic microplastic footprint from a connectivity perspective
Researchers analyzed how urban river network structures influence microplastic distribution in Nanjing, China, finding that river connectivity patterns significantly affect the spatial variability of microplastic footprints in urban waterways.
Abundance and characteristics of microplastics in the surface water and sediment of parks in Xi'an city, Northwest China
Researchers surveyed microplastic pollution in urban park water bodies and sediments across Xi'an city, finding concentrations of 2,900-6,970 items per cubic meter in surface water, with distribution patterns linked to surrounding urban land use functions.
Spatial and Temporal Distribution Characteristics and Potential Sources of Microplastic Pollution in China’s Freshwater Environments
Researchers surveyed microplastic pollution across freshwater environments in 21 major Chinese cities and found an average concentration of about 3,500 particles per cubic meter. The most common types were fibers, and concentrations generally increased from western to eastern China, closely tracking levels of human activity. The study found that microplastic abundance peaked in summer, likely driven by increased rainfall washing particles into waterways.
Comparison of microplastic pollution in different water bodies from urban creeks to coastal waters
Microplastics were surveyed across a gradient of water body types in the Yangtze Delta area—from city creeks to rivers, estuary, and coastal sea—finding higher concentrations in freshwater (1.8–2.4 items/L) than estuarine/coastal water (0.9 items/L) and a dilution gradient from urban to marine environments. The study provides systematic data on how microplastic concentrations change along the freshwater-to-ocean continuum in a densely urbanized region.
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.
[Pollution Status and Pollution Behavior of Microplastic in Surface Water and Sediment of Urban Rivers].
Researchers surveyed microplastic pollution in surface water and sediments of eight rivers across urban and suburban areas of Shanghai, finding widespread contamination that varied by location and urbanization level. The study provides a detailed picture of how urban rivers act as pathways for microplastics moving from land to sea.
Microplastics in China’s surface water systems: Distribution, driving forces and ecological risk
Researchers compiled over 14,000 samples from across China to map microplastic pollution in surface water systems using machine learning models. They found that microplastic abundance varied enormously across regions, driven by a complex mix of human activities and natural conditions. The ecological risk assessment revealed that watersheds in nearly all Chinese provinces face high to extremely high contamination levels, underscoring the urgency of nationwide management efforts.