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Emerging contaminants, including microplastics, in surface waters : uses of watersheds and impacts on the environment
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This thesis investigated emerging contaminants including microplastics in surface waters across different land use types in Brazil, examining how watershed activities influence contamination levels in rivers and streams.
Orientadores: Cassiana Carolina Montagner, Altair Benedito Moreira
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Integrated occurrence of contaminants of emerging concern, including microplastics, in urban and agricultural watersheds in the State of São Paulo, Brazil
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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.
Understanding Microplastic Pollution in Riverbed Sediments: Special Emphasis on a Medium-Sized City in the State of São Paulo, Brazil
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Sediment samples from an urban stream in Rio Claro, Brazil showed microplastic concentrations up to 18,000 units per kilogram — among the highest reported in Brazil — with fibers and tire wear particles as the dominant types, driven by untreated sewage and stormwater runoff. The extreme pollution levels in a mid-sized city highlight that microplastic contamination is not confined to megacities, posing risks to water quality in smaller urban centers.
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Researchers quantified the relative contributions of different land-use sources to riverborne microplastics in a tropical catchment, providing data to help prioritize pollution reduction measures for protecting human and ecological health.
Assessment of water quality in the upper Brantas River through microplastic-associated biofilms and heavy metal accumulation
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Researchers assessed water quality in Indonesia's upper Brantas River by analyzing microplastic-associated biofilms and heavy metal accumulation, finding that microplastics act as carriers that concentrate pollutants and amplify contamination risk in an aquatic ecosystem under urban and agricultural pressure.
Microplastics in water from the confluence of tropical rivers: Overall review and a case study in Paraiba do Sul River basin
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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.
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