Análise da Qualidade da Água da Chuva em Função de Poluentes Atmosféricos na Cidade do Rio de Janeiro
Análise da Qualidade da Água da Chuva em Função de Poluentes Atmosféricos na Cidade do Rio de Janeiro
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DOI: 10.22533/at.ed.1742303118
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Palavras-chave: poluição atmosférica, qualidade do ar, sistema de aproveitamento de água de chuva, monitoramento da precipitação.
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Keywords: atmospheric pollution, air quality, rainwater harvesting system, precipitation monitoring.
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Abstract: This study aims to establish the correlation between specific atmospheric pollutants and the quality of stored rainwater from direct precipitation (PD), first flush (FF), and reservoir (RR) points in a stormwater system installed in the city of Rio de Janeiro. The methodology involved analyzing samples of rainwater collected from a stormwater system located in the Rio Comprido neighborhood in Rio de Janeiro, between January 2018 and December 2019. The samples were classified into dry and wet periods and analyzed for pH, turbidity, and electrical conductivity. The atmospheric pollutants, including Carbon Monoxide (CO), Particulate Matter (MP10), Sulfur Dioxide (SO2), Nitrogen Dioxide (NO2), and Ozone (O3), were obtained from the Rio de Janeiro City Hall's MonitorAr System. Statistical analysis of the data was performed using the RStudio language, including the creation of graphs and correlation matrices. The rainwater samples exhibited acidic characteristics, primarily at the PD point during the dry period. The FF point showed the highest turbidity results, with the highest average also observed during the period of lower precipitation. The highest averages for electrical conductivity also occurred during the dry season for all three analyzed points. From the 3 correlation matrix, it was observed that electrical conductivity was influenced by atmospheric pollutants as well as consecutive rainless days (DCSC). Turbidity at the PD point indicated a strong correlation with particulate matter (MP10) and DCSC. Strong correlations between atmospheric pollutants and the acidity of rainwater were not observed. The dry period favored an increase in pollutant concentrations in the atmosphere, compromising the quality of collected rainwater. The washing of the atmosphere by initial precipitation was evident, highlighting the importance of the initial volume discard device in retaining pollutants for the reservoir.
- Alfredo Akira Ohnuma Júnior
- Jaqueline Costa Areas de Almeida
- Caroline Moreira de Souza
- Ana Beatriz Almeida de Souza
- Letícia Delduque Alves
- Julia de Souza Lemos
- Wendel Henrique S. de Souza
- Athila Dias Carrapatoso Ribeiro
- Ryan Rodrigues Domingos