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61,005 resultsShowing papers similar to Review: Microplastic contamination in the Guandu River basin: The water supply reservoir of Rio de Janeiro metropolitan region (Southeastern Brazil) — R1/PR7
ClearReview: 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) — 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.
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) — 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.
Author comment: Microplastic contamination in the Guandu River basin: The water supply reservoir of Rio de Janeiro metropolitan region (Southeastern Brazil) — R0/PR1
Researchers investigated microplastic contamination in the Guandu River basin, the primary water supply for the Rio de Janeiro metropolitan region, collecting surface water samples via Manta trawl at 11 sites across two seasons and finding abundances of 6.1 particles/m3 in the cold-dry season and 2.3 particles/m3 in the wet season.
Author 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.
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.
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.
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.
Qualitative and quantitative analysis of microplastics in runoff sediments and their correlation with land use and occupation in an urban area in the city of Bauru-SP
Researchers analysed the qualitative and quantitative distribution of microplastics in urban runoff sediments across different land use categories in Bauru, Sao Paulo, Brazil, including social housing, traditional residential, high-income residential, commercial, and industrial zones. Results indicated that microplastic abundance in transported sediments correlated with land use intensity, with more densely populated and active areas generating higher microplastic loads entering urban drainage networks.
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.
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.
Assessment of Small-Scale Microplastics Abundance and Characterization in Urban River: A Case Study in Metro River, Indonesia
Researchers assessed microplastic contamination in the Metro River in Indonesia, finding that abundance and characteristics varied by land use type, with urban areas showing higher concentrations of fragments and fibers in this rapidly developing region.
Characteristics, Contamination Levels, and Ecosystem Risk Assessment of Microplastics in Surface Water of a Highly Urbanized River from a Developing Country
Researchers characterized microplastic contamination in an urban river near a megacity in a developing country, finding concentrations of 350 to 660 particles per cubic meter of water. Polyethylene and polypropylene from household and municipal waste were the most common types, and a risk assessment found concerning contamination levels at several sampling sites. The study highlights how rivers in developing nations can serve as major pathways for microplastics to reach the ocean and enter the food chain.
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 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.
Revealing microplastic dynamics: the impact of precipitation and depth in urban river ecosystems
Microplastic abundance was monitored at different depths and during different precipitation events in urban rivers in Brazil, finding that rainfall significantly increases MP concentrations and that deeper water layers can carry higher loads than surface water.
Distribuição longitudinal, vertical e temporal de microplásticos no Igarapé do Mindu em Manaus, Amazonas
Researchers analyzed longitudinal, vertical, and temporal distribution of microplastics in the Mindu stream in Manaus, Brazil, finding that urban concentration, stream hydrodynamics, and riparian vegetation all influence microplastic contamination patterns in this Amazonian freshwater system.
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.
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.
Integrated occurrence of contaminants of emerging concern, including microplastics, in urban and agricultural watersheds in the State of São Paulo, Brazil
Researchers measured contamination from microplastics and other emerging pollutants in both urban and agricultural watersheds in the Brazilian state of Sao Paulo. They found microplastics in all sampled locations, along with pesticides, caffeine, and other chemicals, with pollution patterns differing between urban and farming areas. The study shows that microplastic contamination is widespread in Brazilian water systems used for drinking and irrigation, contributing to human exposure through multiple pathways.