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61,005 resultsShowing papers similar to Microplastic Accumulationin Hong Kong’s MarineSediment: Spatial Pattern and Potential Sources
ClearMicroplastic Accumulation in Hong Kong’s Marine Sediment: Spatial Pattern and Potential Sources
Researchers conducted a comprehensive survey of microplastics in marine sediments across Hong Kong's waters. They found microplastics at every sampling site, with fibers and fragments being the most common forms and polypropylene and polyethylene the dominant plastics. The spatial patterns suggest that coastal urbanization and water circulation are key factors driving where microplastics accumulate in sediments.
Microplastic pollution in the marine waters and sediments of Hong Kong
Seasonal surveys of surface water and sediments across four coastal locations in Hong Kong found microplastics at all sites, with the highest concentrations in the most urbanized harbor areas. This first comprehensive study of Hong Kong coastal waters reveals that even heavily trafficked port environments accumulate large quantities of microplastic pollution.
Disentangling the anthropogenic and environmental correlates of microplastic pollution in the coastal waters of a metropolis in Southern China
Researchers surveyed 31 sites across Hong Kong's coastal waters and found microplastics at every location, with concentrations ranging widely depending on local conditions. They analyzed both human activity patterns and environmental factors to identify the main drivers of contamination. The study found that population density and proximity to urban discharge points were strongly associated with higher microplastic levels in surface waters.
Spatial and temporal variations of coastal microplastic pollution in Hong Kong
This study documented microplastic contamination in the coastal environment of Hong Kong across multiple sites from 2016 to 2017, finding the highest levels in an industrialized harbor area. Repeated contamination across years confirms that microplastic pollution in Hong Kong's coastal waters is persistent and linked to ongoing urban and industrial activities.
Hong Kong at the Pearl River Estuary: A hotspot of microplastic pollution
Beach surveys around Hong Kong found microplastic densities averaging over 5,500 items per square meter, higher than many other reported coastal areas, with expanded polystyrene dominating. The high contamination reflects Hong Kong's position at the heavily polluted Pearl River Estuary and underscores the regional plastic pollution problem.
Occurrence and Composition of Microplastics in the Seabed Sediments of the Coral Communities in Proximity of a Metropolitan Area
Benthic sediment samples from four sites adjacent to coral communities in Hong Kong were analyzed for microplastics, finding concentrations of 169–221 items/kg with polyethylene and polypropylene fragments dominant. The study documents significant microplastic contamination in sediments surrounding coral communities in a heavily urbanized coastal city.
The influences of spatial-temporal variability and ecological drivers on microplastic in marine fish in Hong Kong
Researchers found that over 57% of marine fish in Hong Kong waters contained microplastics, with higher abundance in fish from more polluted western waters during the wet season, and that omnivorous fish ingested significantly more microplastics than carnivorous fish regardless of collection location or season.
Seasonal variations in the abundance and distribution of small-sized microplastics in Hong Kong's marine waters
A study of Hong Kong marine waters found that small microplastics (20–300 μm), which are typically missed by standard trawl sampling, are present at concentrations far higher than larger microplastics, with seasonal peaks during the wet season linked to runoff. This finding reveals a major gap in how microplastic pollution in coastal waters is currently measured and potentially underestimated.
Quantitative analysis and risk assessment to full-size microplastics pollution in the coastal marine waters of Hong Kong
Researchers conducted a quantitative analysis of full-size microplastics ranging from 1 micrometer to 5 millimeters in coastal marine waters at twelve locations in Hong Kong. The study found that smaller microplastics in the 1-50 micrometer range were far more abundant than larger ones, and risk assessment indicated that microplastic pollution in Hong Kong's coastal waters poses potential ecological concerns.
Spatio-temporal comparison of neustonic microplastic density in Hong Kong waters under the influence of the Pearl River Estuary
Spatial and temporal surveys of microplastic density in Hong Kong surface waters found elevated concentrations near the Pearl River Estuary and seasonal variation linked to river discharge. The study provides empirical evidence that river outflow from China's Pearl River is a significant driver of coastal microplastic distribution in Hong Kong waters.
Microplastics in Hong Kong's marine waters: Impact of rainfall and Pearl River discharge
Researchers systematically tracked microplastic levels in Hong Kong's coastal waters from 2019 to 2021 and found that seasonal rainfall was a much bigger driver of contamination than pandemic-related factors like mask use. Microplastic abundance was significantly higher during the wet season, with surface runoff from rain carrying land-based pollution into the ocean. Sites closer to the Pearl River Delta had the highest levels, indicating that river discharge is a major source of marine microplastic contamination in the region.
Heavy metals contamination of sedimentary microplastics in Hong Kong
Researchers conducted the first study of heavy metal contamination on microplastics found on sandy beaches in Hong Kong. They found that polyethylene, polypropylene, and polystyrene were the most common plastic types, with iron, zinc, and manganese being the most concentrated metals. Samples from western Hong Kong sites near the Pearl River had significantly higher metal concentrations, suggesting the river is a major source of heavy metals on microplastics.
Microplastics from effluents of sewage treatment works and stormwater discharging into the Victoria Harbor, Hong Kong
Researchers found that sewage treatment works and stormwater outfalls in Hong Kong discharge up to 10,816 microplastic pieces per cubic metre into Victoria Harbor, with polyethylene and polypropylene as the dominant polymer types released at an average rate of 3.5 mg per capita per day. Bioaccumulation of these microplastics was also detected in marine fish collected from the harbor.
Distribution and characterization of microplastics in marine sediments from coastal and offshore in South Korea
Researchers conducted an intensive survey of microplastic levels and distribution in marine sediments from coastal areas, recognizing the seafloor as the ultimate repository for plastic particles. Microplastic concentrations in sediments were highest near urban and industrial coastlines, with fibers and fragments as the most common types.
Microplastics in Marine Sediments in Eastern Guangdong in the South China Sea: Factors Influencing the Seasonal and Spatial Variations
This study investigated seasonal variation in microplastic abundance in marine sediments across multiple-use zones of Eastern Guangdong in the South China Sea, finding that seasonal and spatial patterns were influenced by hydrodynamic conditions, rainfall, and proximity to 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 and environmental risk assessment of microplastics in continental shelf sediments in the southern East China Sea: A high-spatial-resolution survey
Researchers conducted a high-spatial-resolution survey of microplastics in surface sediments across the southern East China Sea continental shelf, finding omnipresent contamination dominated by polyethylene fibers and fragments, with concentrations elevated near urban coastal areas.
[Distribution Characteristics of Microplastics in Surface Water and Sediments of Haizhou Bay, Lianyungang].
Researchers characterized microplastic pollution in surface water and sediments of Haizhou Bay, a small-to-medium-sized inshore bay in Lianyungang, China, documenting the main polymer types, abundances, and spatial distribution patterns to fill a gap in knowledge about microplastics in smaller Chinese coastal environments.
Microplastic Contamination on the Beaches of South China
Researchers surveyed microplastic contamination across 14 beaches along the South China coast, finding microplastics ubiquitously present in sandy sediments, predominantly as small fragments under 1 mm, with distribution patterns linked to coastal urbanization and ocean current dynamics.
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.
Distribution and characterization of microplastics in marine sediments from coastal and offshore in South Korea
Researchers conducted an intensive survey of microplastic distribution and characterization in marine sediments from coastal areas, confirming the seafloor as a long-term sink for plastic pollution. Contamination was highest near urban coastlines, with fibers and fragments accumulating preferentially in low-energy depositional environments.
Coastal zone use influences the spatial distribution of microplastics in Hangzhou Bay, China
Researchers characterized microplastic abundance, size, and polymer types in water, sediment, and biota across Hangzhou Bay, China, an area heavily influenced by human activities. The study found that different forms of coastal zone use, including mariculture, port activities, and urban development, significantly influenced the spatial distribution of microplastics in the region.
Distribution, compositional characteristics, and historical pollution records of microplastics in tidal flats of South Korea
Researchers investigated spatial and vertical distributions of microplastics in tidal flat sediments along the west coast of South Korea, finding distinct patterns in abundance and polymer composition linked to proximity to urban centers and tidal hydrodynamics.
Microplastics pollution in the rivers of a metropolitan city and its estimated dependency on surrounding developed land
Researchers surveyed microplastic pollution in four rivers across Hong Kong and found that rivers in urbanized areas had significantly higher concentrations of plastic particles than the rural river. The most polluted river contained over 53 plastic particles per liter of water, and contamination levels correlated with the proportion of developed land in surrounding areas. The study suggests that urban development and population density are key drivers of microplastic pollution in city waterways.