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61,005 resultsShowing papers similar to Macroplastics in the Guarapiranga reservoir (São Paulo, Brazil): estimating the generation of microplastics
ClearMacroplastics in the Guarapiranga reservoir (São Paulo, Brazil): estimating the generation of microplastics
This study identified and quantified macroplastics and microplastics in the Guarapiranga Reservoir in Sao Paulo, Brazil, a major public water supply reservoir, assessing contamination levels and sources. Plastics of multiple size classes were detected in the reservoir, highlighting contamination risks for a water body used to supply drinking water to millions of people.
Microplastic pollution of water and sediment from the Guarapiranga Reservoir, Metropolitan Region of São Paulo, Brazil
Researchers measured microplastic contamination in water and sediment from the Guarapiranga Reservoir in the Sao Paulo metropolitan region of Brazil, a major drinking water source. The study found diverse microplastic types and raises concerns about plastic pollution in urban water supply systems.
Microplastic contamination in the Guandu River basin: The water supply reservoir of Rio de Janeiro metropolitan region (Southeastern Brazil)
Researchers characterised the extent and distribution of microplastic contamination throughout the Guandu River basin in Brazil, which supplies drinking water to a major urban area, quantifying MP concentrations and identifying dominant polymer types and morphologies to assess risks to the water supply.
Microplastic Pollution in Water and Sediments in a Public Supply Reservoir in Presidente Prudente (SP), Brazil
Researchers surveyed microplastic contamination in a public water supply reservoir in Brazil and identified 663 particles, predominantly fibers, with the most common polymers being PET, polypropylene, and polyethylene. The total estimated microplastic load in the reservoir was approximately 15.7 million particles, with higher concentrations near urbanized areas, suggesting untreated domestic and industrial effluents as primary contamination sources.
Microplastic pollution responses to spatial and seasonal variations and water level management in a polymictic tropical reservoir (São Paulo, Brazil)
Researchers assessed microplastic pollution in water and sediment from the Guarapiranga Reservoir in Brazil, which supplies drinking water to over five million people. They found that microplastic concentrations were higher near urbanized areas and during the dry season, with water management operations like reservoir drawdowns influencing particle distribution. The study highlights the connection between urban land use, seasonal patterns, and microplastic contamination in critical drinking water sources.
Review: Microplastic contamination in the Guandu River basin: The water supply reservoir of Rio de Janeiro metropolitan region (Southeastern Brazil) — R1/PR7
Researchers found microplastic concentrations of 6.1 ± 4.9 particles/m³ in the cold-dry season and 2.3 ± 1.1 particles/m³ in the warm-rainy season in the Guandu River basin of Rio de Janeiro, with polyethylene and polypropylene dominating and higher abundance linked to greater urban land use.
Review: Microplastic contamination in the Guandu River basin: The water supply reservoir of Rio de Janeiro metropolitan region (Southeastern Brazil) — R1/PR8
Researchers found microplastic contamination throughout the Guandu River basin in Brazil, which supplies water to the Rio de Janeiro metropolitan region, with abundance averaging 6.1 particles/m3 in the cold-dry season and 2.3 particles/m3 in the warm-rainy season, dominated by fragments and fibers across 11 identified polymer types.
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.
Review: Microplastic contamination in the Guandu River basin: The water supply reservoir of Rio de Janeiro metropolitan region (Southeastern Brazil) — R0/PR2
Researchers investigated microplastic contamination in the Guandu River basin — the primary water supply for the Rio de Janeiro metropolitan region — collecting surface water samples at 11 sites using Manta trawl nets in two seasonal periods. They found MP abundances of 6.1 particles/m3 in the cold-dry season and 2.3 particles/m3 in the warm-rainy season, with fragments and fibres dominant, polyethylene and polypropylene the most common polymers, and no significant seasonal differences in overall abundance.
How natural and anthropogenic factors should drive microplastic behavior and fate: The scenario of Brazilian urban freshwater
This review examines the factors driving microplastic contamination in Brazilian freshwater systems, including the country's massive plastic production and limited recycling infrastructure. Researchers highlight that more than half of post-consumer plastic packaging in Brazil goes unmonitored, and most microplastic research has focused on marine environments while freshwater data remains scarce. The study calls for more systematic monitoring of Brazilian rivers and lakes, especially given the country's continental-scale waterways and diverse ecosystems.
Recommendation: Microplastic contamination in the Guandu River basin: The water supply reservoir of Rio de Janeiro metropolitan region (Southeastern Brazil) — R0/PR4
Researchers assessed microplastic contamination in the Guandu River basin — the primary water supply reservoir for the Rio de Janeiro metropolitan region — collecting surface water samples at 11 sites across two seasons and identifying 11 polymer types via micro-FTIR, with abundances of 6.1 particles/m3 in the cold-dry season and 2.3 particles/m3 in the warm-rainy season.
Microplastics in water from the confluence of tropical rivers: Overall review and a case study in Paraiba do Sul River basin
Researchers surveyed microplastic contamination at river confluences in the Paraiba do Sul River basin, Brazil's most important southeastern watershed serving millions of people. They found microplastics throughout the river system, with higher concentrations near industrial and densely populated areas. Since this river basin supplies drinking water and supports agriculture for a large population, the contamination raises direct concerns about human microplastic exposure.
Recommendation: Microplastic contamination in the Guandu River basin: The water supply reservoir of Rio de Janeiro metropolitan region (Southeastern Brazil) — R1/PR9
Researchers documented microplastic contamination across 11 sampling sites in the Guandu River basin in southeastern Brazil, identifying diverse polymer types including polyethylene, polypropylene, and PET using micro-FTIR, with fragment shapes and seasonal variation in particle abundance.
Spatiotemporal variation in microplastic contamination along a subtropical reservoir shoreline
Researchers tracked microplastic contamination along the shoreline of a subtropical reservoir over two years and found that microplastic abundance was higher near urban areas and varied with season, with storm-related inputs creating significant temporal spikes.
Presence and Quantification of Microplastic in Urban Tap-Water
Tap water samples from Brasília, Brazil were found to contain microplastic contamination, with fibers being the most common type detected across both residential zones tested. The study adds to growing evidence that people may be regularly ingesting microplastics through municipal drinking water.
Plastic pollution in freshwater ecosystems: macro-, meso-, and microplastic debris in a floodplain lake
Researchers surveyed macro-, meso-, and microplastic debris in a South American floodplain lake and found an average of 704 microplastic particles per square meter in sediments, with plastic contamination comparable to marine beaches — demonstrating that freshwater lakes can be major plastic pollution reservoirs.
Microplastic contamination in the highly polluted Tietê River (São Paulo, Brazil): an unsustainable human-nature relationship
Researchers analyzed microplastic contamination in the Tiete River downstream of Sao Paulo, one of the most polluted rivers in Brazil. They found microplastics in both water and sediment samples across wet and dry seasons, with fibers and fragments being the dominant types. The study confirms that heavily urbanized areas are major sources of microplastic pollution that contaminates downstream river ecosystems.
Global meta-analysis of microplastic contamination in reservoirs with a novel framework
Microplastic abundance in reservoirs worldwide varied over 2-6 orders of magnitude, with small particles (<1 mm) comprising over 60% of total counts; geographic location, seasonal variation, and land-use type were the main drivers, and current mitigation policies were found insufficient.
Benthic macroinvertebrates and microplastic contamination in contrasting water quality environments of the Middle Tietê River basin (São Paulo, Brazil)
Researchers compared microplastic contamination in benthic invertebrates and sediments between a heavily polluted urban river and a cleaner tributary in São Paulo, Brazil. Higher microplastic concentrations were found near urban areas, confirming that human activity drives plastic accumulation in freshwater ecosystems.
First evidence of microplastic contamination in the freshwater of Lake Guaíba, Porto Alegre, Brazil
The first evidence of microplastic contamination was documented in the freshwater of Lake Guaiba, Porto Alegre, Brazil, a major drinking water source. Microplastics were found in lake water samples, raising concerns about potential contamination of drinking water supplies derived from this freshwater body.
Plastic waste in surface waters of an urban estuary
Researchers assessed plastic waste in the surface waters of the Capibaribe River estuary in Brazil, cataloguing 381 macroplastic items (mostly soft fragments at 83.9%) and 1,757 microplastic particles concentrated in the upper and middle estuary, with advanced degradation stages observed across 90.5% of collected debris.
Presence and Quantification of Microplastic in Urban Tap Water: A Pre-Screening in Brasilia, Brazil
Researchers sampled tap water from Brasilia, Brazil and detected microplastics in all samples, with fibers as the dominant type and concentrations higher than many previous studies from other cities, highlighting the need for treatment infrastructure improvements and standardized monitoring.
Suspended microplastics in a highly polluted bay: Abundance, size, and availability for mesozooplankton
Researchers quantified suspended microplastics in Guanabara Bay, Brazil using different mesh size nets, finding high microplastic abundance and characterizing size distributions to assess the availability of plastic particles for ingestion by mesozooplankton as an entry point into the food web.
Quantification and composition analysis of plastic pollution in riverine beaches of the lower Paraná River, Argentina
Researchers found macro-, meso-, and microplastics along riverbanks near Rosario city on the lower Paraná River in Argentina, with single-use items being dominant. The study highlights that South American freshwater rivers are important conduits for plastic pollution entering the ocean.