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Análise qualiquantitativa de microplásticos em sedimentos de escoamento superficial urbano em Bauru, SP: correlações com diferentes usos e ocupação do solo
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Researchers analyzed microplastics in urban stormwater runoff sediments across four land-use zones in Bauru, Brazil, finding that microplastic abundance correlated with population density and human activity, while fiber, fragment, film, and granule types appeared consistently across zones, with the highest concentration per unit area in commercial areas likely due to heavy vehicle traffic.
As partculas de microplsticos (MPs) so um dos principais poluentes produzidos atualmente, causando uma enorme preocupao ambiental no mundo.Este trabalho tem por finalidade avaliar as fontes de MPs em rea urbana e sua disposio em diferentes tipos de ocupao do solo.Foram analisados sedimentos transportados pelo escoamento superficial direto que se depositam e entram pelas redes de microdrenagem.As reas da pesquisa foram classificadas em regies de habitaes de interesse social, ocupao tradicional e de alto padro econmico, comercial e industrial.Os dados foram classificados e os resultados relacionados ocupao urbana.As anlises obtidas indicam que a quantidade de MPs transportados pode estar correlacionada com o uso do solo, especificamente, os dados revelaram que reas mais densamente povoadas e com maior atividade antrpica (habitao popular e comrcio) geraram uma quantidade maior de MPs.No entanto, os tipos de MPs encontrados no apresentaram uma relao direta com o padro de ocupao do solo, pois em todas as amostras analisadas a sequncia quantitativa foi a seguinte: Fibras > Fragmentos > Filmes > Grnulos.Todavia, a maior concentrao de MPs por unidade de rea (2,15 Unid./kg,m) foi detectada na rea comercial, sugerindo que o intenso trfego de veculos, mesmo em regies com menor rea pavimentada, pode ser uma fonte significativa de partculas de desgaste de pneus (TWP).As diferenas observadas nas concentraes e composio do MPs entre os usos do solo enfatizam a importncia de considerar os contextos urbanos especficos ao implementar estratgias de mitigao.
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