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61,005 resultsShowing papers similar to Author comment: Microplastic contamination in the Guandu River basin: The water supply reservoir of Rio de Janeiro metropolitan region (Southeastern Brazil) — R0/PR1
ClearAuthor comment: Microplastic contamination in the Guandu River basin: The water supply reservoir of Rio de Janeiro metropolitan region (Southeastern Brazil) — R1/PR6
Researchers investigated microplastic contamination in the Guandu River basin, collecting surface water samples with a Manta trawl at 11 sites across two seasonal periods and finding MP abundances of 6.1 particles/m3 in the cold-dry season and 2.3 particles/m3 in the wet season.
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.
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.
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.
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.
Decision: Microplastic contamination in the Guandu River basin: The water supply reservoir of Rio de Janeiro metropolitan region (Southeastern Brazil) — R0/PR5
Researchers found microplastic concentrations of 6.1 particles/m³ in the cold-dry season and 2.3 particles/m³ in the warm-rainy season in the Guandu River basin, the primary water supply reservoir for the Rio de Janeiro metropolitan region. Polyethylene and polypropylene dominated among 11 identified polymer types, with higher microplastic abundance near more urbanized areas, indicating land use as a primary driver of contamination.
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.
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.
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.
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.
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.
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 surface waters in Guanabara Bay, Rio de Janeiro, Brazil
Researchers sampled surface waters of Guanabara Bay, Rio de Janeiro, Brazil, by horizontal plankton net trawling, finding microplastic concentrations ranging from 1.40 to 21.3 particles/m2 with chemical compositions identified by infrared spectroscopy. The results document widespread microplastic contamination in this heavily urbanised coastal bay.
Microplastics contamination in the proximities of a water treatment station for human supply: Guandu River (Brazil)
This study assessed microplastic contamination in the Guandu River, the main freshwater source supplying the water treatment station for Taipei, sampling water and sediment near the treatment facility. Microplastics were detected upstream of and near the water treatment infrastructure, highlighting contamination risk to drinking water supply.
Influence of Urbanization and Seasonality on Microplastics in a Small Brazilian Inland Stream
Researchers sampled a small Brazilian inland stream upstream and downstream of an urban center during dry and rainy seasons, finding urbanization significantly increased microplastic abundance from 1.7 to 2.6 particles per liter during the dry season, while rainfall effects were less consistent.
Macroplastics 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.
Macroplastics in the Guarapiranga reservoir (São Paulo, Brazil): estimating the generation of microplastics
Researchers surveyed macroplastics in the Guarapiranga Reservoir, a major public water supply in Sao Paulo, Brazil, and estimated the rate of microplastic generation from their fragmentation. Large plastic debris in the reservoir was found to be a significant in-situ source of secondary microplastics.
Microplastics contamination in the proximities of a water treatment station for human supply: Guandu River (Brazil)
This study examined microplastic contamination in the Guandu River near Taipei's main water treatment station, characterizing particle types and concentrations in water and sediments adjacent to the facility. Microplastics were present in the river system supplying the treatment plant, with implications for monitoring drinking water contamination pathways.
Is the Paraíba do Sul River colourful? Prevalence of microplastics in freshwater, south-eastern Brazil
Researchers investigated microplastic abundance, morphotypes, polymer composition, and color distribution in surface waters of the Paraiba do Sul River basin in southeastern Brazil, and examined how the hydrological cycle affected microplastic concentrations along the river stretch. The study found microplastics across all sampled sites with fibers as the dominant morphotype, and detected seasonal variation in abundance linked to river flow dynamics.
Zooplankton exposure to microplastic contamination in a estuarine plume-influenced region, in Northeast Brazil
Researchers examined microplastic contamination in estuarine plume waters off the coast of northeastern Brazil and its relationship with zooplankton. The study found significantly higher microplastic abundance during the high rainfall season, with fibers and fragments being the dominant types, and elevated concentrations in river plume areas compared to reef-adjacent waters, indicating land-based sources as major contributors.
First assessment of microplastic and artificial microfiber contamination in surface waters of the Amazon Continental Shelf
Researchers characterized microplastics in surface water of the Amazon Continental Shelf for the first time, finding particles at all 57 sampling sites with higher concentrations during the rainy season. Polyamide, polyurethane, and acrylonitrile butadiene styrene were the most common polymer types, and concentrations were highest near river mouths and coastal cities.
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.
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.
The impact of sediment dumping sites on the concentrations of microplastic in the inner continental shelf of Rio de Janeiro/Brazil
Microplastics were found in bottom sediments on Brazil's Rio de Janeiro continental shelf, in an area impacted by dredged materials and untreated sewage. The distribution of particles suggests both local accumulation and transport from highly polluted Guanabara Bay, showing how urban pollution spreads into offshore areas.