We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Papers
61,005 resultsShowing papers similar to Qualitative and quantitative assessment of Microplastic Pollution in waters and sediments of the Ave River estuary (Portugal)
ClearQualitative and quantitative assessment of Microplastic Pollution in waters and sediments of the Ave River estuary (Portugal)
This study assessed microplastic pollution levels and distribution in the Ave River estuary and coastal waters of Portugal, characterizing particle types and concentrations to quantify the plastic load transferred from this heavily impacted river to the marine environment. Results showed the estuary acts as both a sink and a source for microplastics depending on tidal and flow conditions.
Microplastic pollution in the Tagus River: Distribution and abundance from the the river mouth to the Portuguese border
Researchers conducted the first assessment of microplastic presence in the Portuguese stretch of the Tagus River, characterizing particle distribution and abundance in a major inland waterway that has been understudied compared to marine and coastal systems. Microplastics were detected throughout the sampled river stretch, with spatial patterns reflecting land use and wastewater inputs along the catchment.
Microplastic pollution in the Tagus River: Distribution and abundance from the the river mouth to the Portuguese border
Researchers assessed microplastic pollution in the Tagus River for the first time from its source through tidal zones, examining spatial distribution and abundance. The study found widespread microplastic contamination throughout the river, with higher concentrations in areas of greater human activity.
Microplastics in coastal sediments from Southern Portuguese shelf waters
Microplastics were found in coastal sediments collected from southern Portuguese shelf waters, with the highest concentrations near river mouths and populated coastal areas. The study provides baseline data for this Atlantic European coastline and reinforces the pattern that proximity to human settlements drives sediment microplastic loading.
Seasonal Abundance and Distribution Patterns of Microplastics in the Lis River, Portugal
Researchers investigated seasonal microplastic abundance and distribution in Portugal's Lis River Basin across nine sites, finding fibres and fragments dominated in both water and sediment, with polyethylene the most common polymer in water. Population density, plastic processing companies, and meteorological factors were all associated with seasonal variation in microplastic patterns.
Monitoring and Promoting Citizen Engagement in Assessing the Ecological Status of Ave River: A Case Study in Northern Portugal
Not relevant to microplastics — this Portuguese study assessed the ecological health of a river using biological and chemical indicators and recruited citizen scientists to help monitor water quality, with no focus on microplastics.
Spatial and temporal distribution of microplastics in water and sediments of a freshwater system (Antuã River, Portugal)
This study tracked the spatial and temporal distribution of microplastics in water and sediments of a freshwater lake, finding seasonal variation in microplastic concentrations and identifying local land use and runoff as key drivers of contamination patterns.
Spatial distribution patterns and identification of microplastics on intertidal sediments from urban and semi-natural SW Atlantic estuaries
Microplastic spatial distribution and polymer types were mapped in intertidal sediments of Portuguese estuaries, environments that act as transition zones between rivers and the sea. The study found both buoyant and non-buoyant microplastics accumulating in estuarine sediments, highlighting their role as microplastic sinks.
Assessment, characterization, and quantification of microplastics from river sediments
Researchers assessed microplastic contamination in sediments from 14 sites along the Kaveri River in South India, characterizing particle types, sizes, and polymer compositions to quantify the extent of microplastic pollution in this freshwater system.
Microplastics in Freshwater River in Rio de Janeiro and Its Role as a Source of Microplastic Pollution in Guanabara Bay, SE Brazil
Researchers found widespread microplastic contamination in three rivers flowing into Guanabara Bay, Brazil, with an average of 3,651 particles per cubic meter dominated by fibers, identifying these freshwater systems as major sources of coastal microplastic pollution.
Distribution patterns of microplastics in subtidal sediments from the Sado river estuary and the Arrábida marine park, Portugal
Researchers conducted a spatiotemporal investigation of microplastic distribution in subtidal sediments at 15 sites across the Sado River estuary and Arrábida Marine Park in Portugal, assessing particle availability for benthic feeders and identifying potential pollution sources. The study found microplastics concentrated in areas influenced by coastal urban centers and multiple human activities, highlighting sediment as an important reservoir.
Microplastics contamination in sediments from Portuguese inland waters: Physical-chemical characterisation and distribution
Researchers characterized microplastic contamination in sediments from Portuguese inland freshwater systems, identifying particle shapes, sizes, and polymer types to establish baseline contamination levels and inform strategies for reducing plastic accumulation in freshwater environments.
Assessment of Microplastic Pollution in River Ecosystems: Effect of Land Use and Biotic Indices
Researchers analyzed microplastic pollution in Spanish river ecosystems and found that concentrations in both water and sediment were strongly linked to surrounding urban land use. They discovered that traditional water quality assessments based on biological indicators do not capture microplastic contamination effectively. The study suggests that new monitoring approaches are needed to account for this emerging pollutant in river health evaluations.
Microplastics on Barra beach sediments in Aveiro, Portugal
Researchers collected sediment samples from Praia da Barra beach in Aveiro, Portugal and found significant quantities of microplastics, with fragment and fibre morphologies dominating, linking contamination to both tourism activity and maritime traffic in this Atlantic coastal zone.
Microplastic contamination in an urban estuary: Abundance and distribution of microplastics and fish larvae in the Douro estuary
Researchers investigated microplastic contamination and fish larval assemblages in the Douro estuary, Portugal, across monthly sampling surveys to assess co-occurrence and potential risk to early fish life stages. The study found that microplastics were present throughout the urban estuary and that fish larvae in nursery habitats face exposure risks from microplastic ingestion and associated pollutant uptake.
Quantifying environmental emissions of microplastics from urban rivers in Melbourne, Australia
Researchers quantified microplastic pollution in four Melbourne rivers flowing into Port Phillip Bay, finding an average of 9 microplastics per liter with polyamide and polypropylene among the most common polymers detected across all sampling sites.
Spatio-temporal distribution of microplastics in a Mediterranean river catchment: The importance of wastewater as an environmental pathway
Microplastic concentrations were mapped across a Mediterranean river catchment in central Spain over multiple seasons, finding that wastewater treatment plant effluents were the dominant point source and that storm events transiently increased concentrations in downstream reaches by mobilizing accumulated particles from river beds and floodplains.
Environmental status of (micro)plastics contamination in Portugal
This is the first comprehensive review of plastic and microplastic contamination in Portugal, finding that thousands of tons of mismanaged waste and trillions of microplastic particles enter the environment annually. Northern and urban regions are most contaminated, with documented impacts on marine life and fisheries.
Microplastic pollution in the surface waters of the zuari river, goa, india
Researchers examined microplastic contamination in the surface waters of the Zuari River in Goa, India, finding microplastics at all sampling stations with concentrations up to 1.38 particles per liter. The most common types were fibers and fragments made of polyethylene terephthalate, high-density polyethylene, and polypropylene. The Pollution Load Index indicated significant contamination, and electron microscopy revealed degradation features and metals on the microplastic surfaces.
A Review of Microplastics Pollution in the River Basin of Vietnam in Comparison with the World Context
This review examines microplastic pollution across Vietnam's river basins in the context of global patterns, finding significant contamination in surface water, sediments, aquatic organisms, and mangrove ecosystems — particularly in coastal urban areas — with concentrations in some urban rivers reaching 519,000 pieces/m³.
Microplastic pollution in rivers of the Adriatic Sea basin in Montenegro: Impact on pollution of the Montenegrin coastline
Researchers measured microplastic concentrations in sediments along three Montenegrin river shores draining into the Adriatic Sea, finding an average of 164 MPs/kg dominated by polyethylene and polypropylene fibers and fragments, identifying these rivers as both sinks and potential sources of coastal microplastic pollution.
Microplastic pollution in the Chapora River, Goa, Southwest India: spatial distribution and risk assessment
Researchers surveyed microplastic pollution in the Chapora River in Goa, India, finding concentrations ranging from 0.1 to 0.47 particles per liter across sampling stations. Fibers were the dominant shape, accounting for over 77% of particles, with polyethylene and polypropylene as the most common polymers. The study suggests that both urban activities and fishing contribute to microplastic contamination in this tropical river system.
Microplastics assessment inthe Krka river estuary surface water
Researchers assessed microplastic contamination in surface water of the Krka River estuary in Croatia, characterizing the abundance, morphology, size, and polymer types of particles found in this Adriatic coastal ecosystem. The study provides baseline data on microplastic distribution in a Mediterranean estuary and identifies likely sources contributing to the observed pollution.
Microplastics and their possible sources: The example of Ofanto river in southeast Italy
Microplastics were surveyed in the Ofanto River in southeast Italy—the first such study in this region—characterizing abundance and composition in banks, surface waters, and sediments and identifying multiple potential input sources including agricultural runoff and urban waste. The study demonstrates that this major Italian river is contaminated with microplastics and transports them toward the Adriatic Sea.