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Effect of urbanization and water quality on microplastic distribution in Conceição Lagoon watershed, Brazil

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Abstract

Urbanization in watersheds leads to the introduction of sources of microplastics and other pollutants in water bodies. However, the effect of urbanization on microplastic pollution and the relationship between microplastics and water quality are not well understood. We assessed the distribution of microplastics in tributaries urbanized, non-urbanized and in the receiving lagoon body of Conceição Lagoon watershed. The results show that urbanization significantly affects water quality but does not differentiate tributaries in terms of microplastic concentrations. Microplastic concentrations were lower in the receiving lagoon body compared with the tributaries, highlighting their importance in microplastic pollution in the studied lagoon. Microplastic concentration was correlated with low N:P ratios in the lagoon and associated with high levels of total phosphorus, which indicate the discharge of effluents. The correlations between microplastic concentration, water temperature, and dissolved oxygen in the lagoon were based on the temporal variations of these variables. Precipitation and wind velocity had influence on microplastic distribution in the watershed. Our findings underscore the importance of evaluating water quality parameters and meteorological variables to comprehend the microplastic distribution at small watersheds.

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Acknowledgements

We thank the scientific team of Laboratório de Ecologia de Águas Continentais (LIMNOS) and of Laboratoire Eau Environnement et Systèmes Urbains (LEESU) for their technical assistance and support. The authors also are grateful to LAPAD-UFSC, LAMEB-UFSC, and PPGECO-UFSC for field and laboratory assistance.

Funding

DGC and ALLS were supported by a grant award by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001. The authors declare that no other support was received during the preparation of this manuscript.

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All authors contributed to the study’s conception and design. Daniela Grijó de Castro and Michelle das Neves Lopes performed material preparation and data collection. Data analysis were performed by Daniela Grijó de Castro, Aurea Luiza Lemes da Silva, Andrea Santarosa Freire, and Nei Kavaguichi Leite. Daniela Grijó de Castro wrote the first draft of the manuscript, and all authors commented on previous versions. All authors have read and approved the final manuscript.

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Correspondence to Nei Kavaguichi Leite.

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The authors declare that the use of the scheme of filtration, as part of Fig. 2 in this manuscript, was authorized by the authors of the original source:

Manzolli, R. P., Portz, L., & Paiva, M. (2011). Oceanografia Química. In Danilo Koetz Calazans (Org.), ESTUDOS OCEANOGRÁFICOS: DO INSTRUMENTAL AO PRÁTICO (1ª ed). Editora Textos.

Permission was granted via email by the author Rogério Pontantiolo Manzolli and by the editor Danilo Koetz Calazans, which can be consulted in the attachment.

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de Castro, D.G., Lemes da Silva, A.L., das Neves Lopes, M. et al. Effect of urbanization and water quality on microplastic distribution in Conceição Lagoon watershed, Brazil. Environ Sci Pollut Res 31, 28870–28889 (2024). https://doi.org/10.1007/s11356-024-33029-y

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  • DOI: https://doi.org/10.1007/s11356-024-33029-y

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