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61,005 resultsShowing papers similar to Hong Kong at the Pearl River Estuary: A hotspot of microplastic pollution
ClearMicroplastic 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.
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.
Microplastic 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.
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.
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.
Microplastic Accumulationin Hong Kong’s MarineSediment: Spatial Pattern and Potential Sources
Researchers conducted a comprehensive survey of microplastics in marine sediments across Hong Kong, finding uneven distribution with abundance ranging from near zero to high levels in urbanized areas. Source analysis pointed to household waste, fishing activity, and stormwater runoff as primary contributors.
Spatial Distribution, Key Influencing Factors, and Ecological Risk of Microplastics in Pearl River Estuary Water and Sediments
Researchers mapped the distribution of microplastics in the water and sediments of the Pearl River Estuary in China and identified the key factors driving contamination levels. Fibers were the most common microplastic type found, and human activity along the coast strongly influenced pollution patterns. The study also assessed ecological risks and provides a framework for understanding how microplastics accumulate in heavily populated estuarine environments.
Spatial distribution, morphology, and risk assessment of microplastics in sediment from the Pearl River Estuary, China
Researchers assessed microplastic contamination in sediment from the Pearl River Estuary in China, one of the world's most densely populated coastal regions. They found microplastics widely distributed across the estuary, with varying shapes and polymer types linked to both urban and industrial sources. The study provides a risk assessment suggesting that sediment microplastic pollution in this ecosystem warrants ongoing monitoring and management.
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.
Characteristics of expanded polystyrene microplastics on island beaches in the Pearl River Estuary: abundance, size, surface texture and their metals-carrying capacity
Researchers surveyed expanded polystyrene microplastic contamination on five island beaches in the Pearl River Estuary, finding abundances ranging from 328 to over 82,000 particles per square meter. The study found that beach-collected EPS microplastics carried significantly higher heavy metal concentrations than new EPS products, suggesting these particles accumulate metals from surrounding sediments and seawater over time.
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.
Spatial-temporal distribution of microplastics in surface water and sediments of Maozhou River within Guangdong-Hong Kong-Macao Greater Bay Area
Researchers mapped the spatial and seasonal distribution of microplastics along the Maozhou River in China's Greater Bay Area. They found that microplastic concentrations were highest near industrial areas and downstream sites, with dry season levels significantly exceeding wet season levels. The dominant polymer types were polyethylene and polystyrene, and metals were detected on the surfaces of recovered microplastic particles.
Hydro-sedimentary conditions shape the microplastic occurrence in sediments of the Pearl River Estuary (China)
A field study of the Pearl River Estuary in southern China found microplastic concentrations in sediments ranging from 4 to 220 particles/kg, with higher abundance in nearshore zones, and identified hydrodynamic conditions and proximity to urban areas as the main drivers of spatial variation.
Microplastic in three urban estuaries, China
Researchers surveyed three urban estuaries in China and found microplastics throughout, with concentrations and types reflecting the combined influence of surrounding city density, stormwater runoff, and tidal mixing.
Spatial variation of floatable plastic debris and microplastics in the Pearl River Estuary, South China
Researchers quantified and characterized microplastics and large plastic debris in surface water from the Inner Lingding Bay of the Pearl River Estuary, finding both types present at all sites with mean abundances of 2.376 and 0.110 items per square meter respectively, predominantly as fibers from multiple sources.
Microplastic abundance, distribution and composition in the Pearl River along Guangzhou city and Pearl River estuary, China
Microplastic abundance and distribution were surveyed in the Pearl River urban section through Guangzhou and the Pearl River estuary, finding average concentrations of 19,860 items/m³ in the urban section and 8,902 items/m³ in the estuary, with over 80% of particles smaller than 0.5 mm. The study documents exceptionally high microplastic concentrations in an urban Chinese river and identifies wastewater effluent and urban tributaries as major sources.
Measurement, quantification, and potential risk of microplastics in the mainstream of the Pearl River (Xijiang River) and its estuary, Southern China
Microplastic distribution was surveyed across the mainstream and estuary of China's Pearl River, finding higher concentrations near urban centers and establishing a detailed inventory of microplastic abundance, polymer types, and potential sources in this major waterway.
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.
Temporal and Spatial Distribution of Microplastics in a Coastal Region of the Pearl River Estuary, China
Researchers found that microplastic abundance in the Pearl River Estuary coastal region was 1.85-fold higher during the rainy season than the dry season, with concentrations decreasing from river to estuary to open sea. Fibers and fragments dominated, with gray, white, and green particles most common across sampling sites.
Microplastics in mangrove sediments of the Pearl River Estuary, South China: Correlation with halogenated flame retardants' levels
Microplastic concentrations in Pearl River Estuary mangrove sediments were high by global standards, averaging 851 items per kilogram, and significantly correlated with population density and GDP in the region. Several types of halogenated flame retardants in the sediments were also correlated with microplastic abundance, suggesting shared pollution sources.
Bisphenol A and its analogues in sedimentary microplastics of Hong Kong
Researchers investigated the occurrence and spatial distribution of bisphenol A and its analogues (BPB, BPF, BPS) in microplastics collected from 11 beaches in Hong Kong, finding BPA as the dominant contaminant with concentrations ranging from 82.4 to 989 ng/g microplastic.
Microplastic occurrence and ecological risk assessment in the eight outlets of the Pearl River Estuary, a new insight into the riverine microplastic input to the northern South China Sea
Researchers estimated that the Pearl River Estuary delivers approximately 304 trillion microplastic particles (1,102 tons) annually into the northern South China Sea, finding that tidal effects significantly influence microplastic abundance and that rural areas on the western side pose underestimated environmental threats.
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.
Microplastic pollution in Pearl River networks: Characteristic, potential sources, and migration pathways
Researchers surveyed microplastic pollution across the Pearl River Basin in China, one of the country's largest river systems, and found microplastics in every water sample at an average of about 1,093 particles per liter. Population density and rainwater runoff were the main factors driving contamination levels, with rainfall washing plastics from land into the river. Since the Pearl River supplies water for millions of people, these findings raise concerns about microplastic exposure through drinking water sources.