Dinâmica do pH da água das chuvas em Passo Fundo, RS

Cunha, G. R. da; Santi, Anderson; Dalmago, Genei Antônio; Pires, J. L. F.; Pasinato, A.

doi:10.1590/s0100-204x2009000400002

Cited by 9 publications

(8 citation statements)

References 29 publications

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“…In a general way, the period with most rain (the Summer) had the lowest averages of pH. The study carried out by Cunha et al 18 showed that in Summer and Spring, the pH was slightly lower than in the Fall and Winter, which reveals the dynamics of the pH of rainfall. Solar radiation gives rise to reactions of gases with the rain and thus forms acids that can reduce the pH, 19 which explains why Summer is the season with the lowest averages of pH.…”

Section: Hydrogenionic Potential (Ph)mentioning

confidence: 95%

The effects of seasonality on the quality of rainfall water in the city of rio de Janeiro

Almeida¹,

Souza²,

Alves³

et al. 2022

IJH

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Critical periods and abnormal rainfall events have been observed in the South-East of Brazil, and this has affected both the amount and quality of the volume of water in the water supply systems. This study seeks to assess the influence of seasonal factors on the quality of rainfall at a water treatment plant, located in the city of Rio de Janeiro - RJ. The methodology involved collecting rainfall samples between January 2017 and December 2018, at four specific points in the system: first flush 1 (FF1), first flush 2 (FF2), void volume (VV) and reservoir (RR). The parameters were analyzed statistically and followed seasonal patterns for each of the seasons of the year, and included: pH, turbidity, electric conductivity, total of alkalinity and chloride. The results suggest that there is an urgent need to dispose of the initial volume stored in the devices of the first flush. The water contained in the tank was of a satisfactory standard for non-drinkable purposes despite the effects of seasonality on the quality of the rainfall water. A multivariate statistical correlation analysis made it possible to assess the influence of the seasons of the year on the quality of pluvial water.

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Section: Hydrogenionic Potential (Ph)mentioning

confidence: 95%

The effects of seasonality on the quality of rainfall water in the city of rio de Janeiro

Almeida¹,

Souza²,

Alves³

et al. 2022

IJH

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“…Valores de pH igual ou acima de 5,6 são considerados normais devido à absorção de CO2 e concentração natural de H2CO3 na água presente na atmosfera (GALLOWAY et al, 1982;BAIRD, 2002). Cunha et al (2009) A variação do pH no período analisado nesta pesquisa pode ter sido influenciada devido à quantidade de chuva precipitada nas datas de amostragem.…”

Section: Mpv =unclassified

Caracterização da qualidade da água da chuva na bacia Carbonífera Catarinense, sul de Santa Catarina

Galatto¹,

Pereira²,

Back³

et al. 2023

SEAS

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Estudos sobre a acidez das chuvas têm sido aprofundados principalmente em regiões urbanizadas e industrializadas, onde se observa um efeito mais visível do resultado da interferência humana sobre o ambiente. O aumento da acidez da chuva é causado pela presença de poluentes liberados na atmosfera, como óxidos de nitrogênio, dióxidos de carbono e de enxofre, provenientes principalmente da queima de combustíveis fósseis. Este estudo buscou analisar a qualidade da água da chuva em cinco estações pluviométricas da Bacia Carbonífera Catarinense (BCC), sul de Santa Catarina. A amostragem foi realizada na água de chuva coletada em pluviômetros convencionais, com frequência bimestral, durante 10 meses. Os indicadores analíticos analisados foram: pH, Condutividade Elétrica, Turbidez e Acidez Total. Foi determinado ainda em laboratório, sulfatos, cloretos e dureza. Observou-se acidez e condutividade mais elevadas nas estações pluviométricas de Siderópolis, Criciúma e Içara, sugerindo que estes locais estão mais sujeitos as emissões de contaminantes atmosféricos. O pH médio ponderado pelo volume (MPV) da região foi de 5,41, variando de 4,65 a 7,59. A condutividade média foi de 63,83 µS.cm-1 e a turbidez de 6,18 NTU, indicando que nos períodos analisados houve pouca presença de partículas em suspensão e matéria orgânica.

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“…Comparing the locations analyzed in Congonhas, the point CA 03, which is located near the historic center where the Aleijadinho's sculptures are located, was the one with the lowest pH values. Cunha et al (2009) considered that the pH of rainwater equal to or greater than 5.6 as normal, between 5 to 5.6 slightly acidic and less than 5 is acidic. Therefore, the only Turbidity (uT)…”

Section: Apparent Color (Uh)mentioning

confidence: 99%

Spatial-temporal variation and modeling of rainwater quality

Teixeira

Policarpo

Silva

et al. 2021

RSD

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Rainwater harvesting (RWH) is an alternative to the problem of water scarcity. However, its quality must be analyzed before its use, so that it does not represent any danger to the consumer. Thus, the objective of this paper was to analyze the spatial-temporal variation of water quality of rainwater in two cities and observe whether its parameters meet the norm related to the subject. In addition, the concentration of total suspended solids (TSS) that flow into the drainage system was also simulated. Rainwater samples were collected at several points in Congonhas and Ouro Branco - MG, over a period of two years. The results showed that there was spatial-temporal variation in water quality. There were points where the quality met the standard in some moments and did not meet in others, due to its temporal variation. It was also observed that the catchment surface influenced the quality of rainwater, so that the water that came into contact with the roof had its quality deteriorated, at first. However, throughout the rainy event, the quality improved, but at certain times, it was not enough to meet the standard. The rainwater quality simulation, carried out at SWMM, showed high concentrations of TSS, which were higher to that allowed for launching into receiving bodies.

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Dinâmica do pH da água das chuvas em Passo Fundo, RS

Cited by 9 publications

References 29 publications

The effects of seasonality on the quality of rainfall water in the city of rio de Janeiro

The effects of seasonality on the quality of rainfall water in the city of rio de Janeiro

Caracterização da qualidade da água da chuva na bacia Carbonífera Catarinense, sul de Santa Catarina

Spatial-temporal variation and modeling of rainwater quality

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