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61,005 resultsShowing papers similar to An Integrated Assessmentof Microplastic Pollutionin Coastal Surface Water and Sediment of Japan
ClearAn integrated assessment of microplastic pollution in coastal surface water and sediment of Japan
Researchers conducted a comprehensive survey of microplastic pollution across 14 coastal locations around Japan from Hokkaido to Okinawa, measuring concentrations of 288.7 g/km2 in surface water and 1,185 kg/km2 in sediment and characterizing polymer types, shapes, and size distributions.
An Integrated Assessment of Microplastic Pollution in Coastal Surface Water and Sediment of Japan
Researchers conducted a comprehensive survey of microplastic pollution in surface water and sediment at 15 coastal locations across Japan, from Hokkaido to Okinawa. They extracted over 53,000 suspected microplastic particles and identified the most common polymers using FTIR spectroscopy. The study provides an integrated baseline dataset for understanding the extent and distribution of microplastic contamination along Japanese coastlines.
TARA-JAMBIO Microplastic Survey: A study of microplastic pollution in coastal areas of Japan
Researchers from the Tara Ocean Foundation and the Japanese Association for Marine Biology (JAMBIO) conducted a joint survey of microplastic pollution in Japanese coastal surface waters and sediments, targeting nearshore environments where data remain scarce. The study aimed to quantify the distribution and drivers of microplastics across multiple coastal sites to fill critical knowledge gaps in regional marine plastic pollution monitoring.
Microplastic volumes in Tokyo Bay
Researchers quantified microplastic volumes across multiple sites in Tokyo Bay, Japan, finding spatial variation linked to urban runoff and river inputs, with surface waters and sediments showing distinct accumulation patterns.
TARA-JAMBIO Microplastic Survey: A study of microplastic pollution in coastal areas of Japan
Researchers conducted the TARA-JAMBIO Joint Microplastics Survey to characterize microplastic pollution in Japanese coastal waters, filling a knowledge gap on the quantity, sources, and spatial distribution of nearshore marine microplastics through a collaboration between the Tara Ocean Foundation and the Japanese Association for Marine Biology.
In-situ analysis of small microplastics in coastal surface water samples of the subtropical island of Okinawa, Japan
Researchers performed in-situ analysis of small microplastics in coastal surface water samples, demonstrating the feasibility of field-based detection methods for capturing fine particles that are often missed in standard sampling. The study contributes to improving microplastic monitoring in coastal environments.
Comprehensive Understanding of Microplastics Inflow Off the Coast of Funabashi
Researchers conducted continuous monitoring of microplastic (MP) contamination in rivers, sewage, and coastal waters around Funabashi in Tokyo Bay, finding that MP number densities showed high temporal variability and a gradual decreasing trend, with upstream river sources driving contamination that diminished toward the sea as particles settled into bottom sediments, while sewage was also implicated as a contributor to marine MP pollution.
High-Resolution Mapping of Japanese Microplastic and Macroplastic Emissions from the Land into the Sea
Researchers developed a high-resolution method to map microplastic and macroplastic emissions from Japanese river catchments into the sea, using correlations between observed river concentrations and basin characteristics such as urban area ratio and population density to generate nationwide plastic emission estimates.
Spatiotemporal variations of surface water microplastics near Kyushu, Japan: A quali-quantitative analysis
Researchers conducted six surveys over 14 months at nine stations near Kyushu, Japan, identifying 6,131 microplastic items with an average abundance of 0.49 items per square meter and average size of 1.71 mm. Spatiotemporal variability was high, with the greatest differences between sampling locations exceeding differences between seasons.
Microplastic abundance in the semi-enclosed Osaka Bay, Japan
Researchers quantified microplastic abundance in the semi-enclosed Osaka Bay, Japan, finding elevated concentrations near river mouths and urban coastal zones, and characterizing dominant polymer types consistent with consumer plastics.
Microplastics in the sediments of small-scale Japanese rivers: Abundance and distribution, characterization, sources-to-sink, and ecological risks
Researchers characterized microplastic pollution in sediments of four small-scale Japanese rivers, finding widespread contamination and identifying polymer types and potential sources, highlighting that even small river systems serve as microplastic transport pathways.
Environmental implications of microplastic pollution in the Northwestern Pacific Ocean
Researchers assessed microplastic concentrations, distribution, and characteristics across the Northwestern Pacific Ocean, finding widespread contamination with significant spatial variation and identifying environmental implications for marine ecosystems in this understudied region.
Microplastic pollution in North Yellow Sea, China: Observations on occurrence, distribution and identification
Researchers surveyed microplastic pollution across the North Yellow Sea, documenting their occurrence, distribution, and characteristics, and finding widespread contamination with higher concentrations in coastal areas and near river inputs.
Concentrations and carbonyl index of microplastic in surface seawater in southeastern coastal region off Japan, Northwestern Pacific
Researchers measured microplastic concentrations in surface seawater along the southeastern coast of Japan, from Okinawa to the Tokai region. They found relatively low but measurable levels of microplastics at most stations, with higher concentrations near a coastal channel, and noted that many particles showed signs of environmental weathering. The study contributes baseline data on microplastic pollution in a major ocean current system in the Northwestern Pacific.
Current Status and Issues of Microplastic Pollution Research
This Japanese review summarized microplastic research in river and ocean environments, including national estimates of plastic discharged from Japan's rivers to the sea and microplastic distribution in Tokyo Bay. The paper also reviewed current analytical methods and their limitations for measuring small microplastic particles.
Microplastics in the Dredged Soil
Researchers (in Japan) developed a standardized method for detecting microplastics in dredged marine sediment and applied it to samples from harbors across Japan. This is the first comprehensive nationwide survey of microplastics in harbor dredge spoils, revealing widespread contamination that raises concerns about where this material is disposed.
A Field Investigate on Curent Status of Microplastic Pollution on Sandy Beaches of Osaka Bay, Japan
Researchers investigated microplastic pollution on sandy beaches across Osaka Bay, Japan, sampling 13 coastal sites and finding concentrations ranging from 50 to 9,500 particles per square meter with most accumulation above the maximum monthly high-tide line. The study found that the innermost areas of the bay had markedly higher contamination, averaging 253-313 particles per square meter compared to a bay-wide mean of 52 particles per square meter.
Microplastics Pollution in the Seto Inland Sea and Sea of Japan Surrounded Yamaguchi Prefecture Areas, Japan: Abundance, Characterization and Distribution, and Potential Occurrences
Microplastic contamination in the Seto Inland Sea and Sea of Japan surrounding Yamaguchi Prefecture, Japan was found at levels comparable to other polluted regions worldwide. Fragments and small microplastics dominated, suggesting local degradation of larger plastic items as the primary source.
A large-scale investigation of microplastic contamination: Abundance and characteristics of microplastics in European beach sediment
This large-scale investigation characterized microplastic contamination across a wide geographic area, documenting abundance and polymer types and providing a baseline dataset for tracking pollution trends over time.
The role of coated fertilizer used in paddy fields as a source of microplastics in the marine environment
Researchers found that polyethylene microcapsules from slow-release coated fertilizers used in Japanese paddy fields are a major source of coastal microplastic pollution, comprising up to 90% of all microplastics sampled during irrigation season, with coastal density influenced by topographic and meteorological conditions beyond simple agricultural land area.
Progress on microplastics pollution and its ecological effects in the coastal environment
This review systematically summarizes a decade of research on microplastic pollution and its ecological effects in coastal environments worldwide, identifying persistent technical challenges in sampling standardization, particle identification, and ecological impact assessment. Researchers highlight the need for unified methodologies to better understand the sources, fate, and biological consequences of coastal microplastic contamination.
Global mapping for the occurrence of all-sized microplastics in seafloor sediments
Researchers compiled global seafloor microplastic data from 155 marine sediment samples including detailed sampling metadata and abundance measurements for 20 microplastic categories, providing foundational data for understanding the distribution and uncertainty of microplastic contamination on the seafloor.
Preliminary Assessment into the Prevalence and Distribution of Microplastics in North and South Pacific Island Beaches
Researchers conducted a preliminary investigation into microplastic prevalence on eight beaches across North and South Pacific Island locations in New Zealand and Hawaii, analyzing contamination as a function of beach location, sand type, and microplastic morphology. The study found microplastics at all eight sites, highlighting the widespread distribution of plastic pollution across remote Pacific Island shorelines.
Occurrence and spatial distribution of microplastics in sediments from Norderney
Researchers surveyed sediments from Norderney in the North Sea and found widespread microplastic contamination, documenting spatial distribution patterns and particle characteristics across this tidally influenced coastal environment.