Uso da cafeína como indicador de poluição por esgoto doméstico em corpos d’água urbanos

Bega, João Miguel Merces; Oliveira, Jefferson Nascimento de; Albertin, Liliane Lazzari; Isique, William Deodato

doi:10.1590/s1413-415220190084

Cited by 9 publications

(15 citation statements)

References 27 publications

(22 reference statements)

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“…We were not able to directly measure root respiration in our study. The intensity of clandestine domestic wastewater inputs decreases significantly in the afternoon (Bega et al, 2021), being a possible explanation, among other factors, for the increased DO concentration in the stream. In March (SP1), April, August, and January (SP2), in the morning, we found DO concentrations equal to 0 mg L −1 because of overnight bacterial respiration, demonstrating that the ecological health of the Sem Nome stream was affected because DO is essential to the maintenance of aerobic organisms (Mader et al, 2017; Banerjee et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

“…We assessed the urban first-order stream water quality between the three periods of the day to elucidate its diurnal variation because it is a subject little explored in the literature, especially when it comes to WQIs. The Sem Nome stream receives many pollutants, coming mainly from clandestine domestic effluents, varying in intensity according to population habits (Bega et al, 2021), which justifies the possible diurnal variation in the water quality parameters.…”

Section: Data Collectionmentioning

confidence: 99%

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Temporal changes in the water quality of urban tropical streams: An approach to daily variation in seasonality

Bega

Filho

Albertin³

et al. 2022

Integr Envir Assess & Manag

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Using water quality indices (WQIs) is one way to monitor watercourses for water quality. Currently, there is a lack of information about their behavior in the diurnal cycle because sampling is often carried out in the morning. Also, few articles focus on assessing the urban impact on the spatial variability of WQIs in tropical first‐order streams. Such streams receive many pollutants varying in intensity according to population habits, justifying the possible diurnal variation in water quality in addition to climatic attributes. This paper aims to evaluate the fluctuations in Brazilian WQIs and their parameters (temperature, turbidity, total solids [TS], hydrogen potential, dissolved oxygen [DO], biochemical oxygen demand [BOD], total phosphorus [TP], total nitrogen [TN], and Escherichia coli) between the morning (8 AM), afternoon (2 PM), and night (7 PM) periods for an urban first‐order tropical stream. Overall, the lowest DO concentrations and highest values of TS, turbidity, BOD, TP, TN, and E. coli were obtained in the morning, possibly representing population habits: the greatest generation of pollutants occurs overnight and in the early morning because there are clandestine domestic wastewater inputs into the stream, whose hourly periodicity generates a similar periodicity in the WQI of the evaluated stream. Although there was a significant variation in WQI average values between morning (15.50 ± 1.97) and afternoon (20.83 ± 5.42) only during the dry season (p < 0.05), different results were common throughout the day in all months, and the water quality was often classified in distinct categories: very bad, bad, and regular. Our findings present another dimension to be considered when assessing urban water quality, leading to direct benefits to the management and use of urban waters. Integr Environ Assess Manag 2022;18:1260–1271. © 2021 SETAC

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Section: Resultsmentioning

confidence: 99%

Section: Data Collectionmentioning

confidence: 99%

Temporal changes in the water quality of urban tropical streams: An approach to daily variation in seasonality

Bega

Filho

Albertin³

et al. 2022

Integr Envir Assess & Manag

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“…It is among the most consumed substances in the world and, due to the similarity of origin, its presence in surface waters signals the existence of other contaminants, which enter through sanitary sewage in springs. [3] [20] [21] [22] [23] [24]. It belongs to the group of soluble lipid compounds called purines, chemically known as 1,3,7, trimethyl xanthine (Figure 2).…”

Section: Introductionmentioning

confidence: 99%

Water Quality and the Impact by Contaminants of Emerging Concern: The Case of Verde River in Campos Gerais

Fonseca¹,

Silva²,

Costa³

et al. 2022

JWARP

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In this article, we report the results of the work carried out on the Verde River, a predominantly urban river located in the city of Ponta Grossa, Paraná, Brazil. Developed in three stages, it aimed to evaluate the water quality through physical-chemical parameters, the presence of caffeine as a chemical tracer, and the compound Triclosan (TCS), considered a pollutant of emerging concern. An attempt was made to identify possible polluting sources along the river. Samples were collected at 4 points from the spring region, with sampling upstream and downstream of a Sewage Treatment Plant (STP). The physical-chemical parameters were determined in situ, through portable analysers, as well as in the laboratory, in this case, through analyses using molecular absorption spectroscopy. For the determination of TCS and Caffeine, high-performance liquid chromatography (HPLC) was used, preceded by a pre-concentration step in the solid phase (SPE), and the techniques were implemented after validation. The physicochemical evaluations of the surface samples showed a decline in water quality after the STP. Mean total phosphorus concentrations of 1.0 mg•L −1 (±0.4), as well as dissolved oxygen (DO) levels below 5.0 mg•L −1 were verified downstream of the STP. Caffeine concentrations for Verde River were between 49.0 to 299.0 µg•L −1 , verified upstream and downstream of the STP. The results demonstrated the relationship between the presence of caffeine and impaction, either by the input of raw sewage or by treated effluent. TCS was detected by chromatographic analysis, downstream of the STP, with an average concentration of 27.6 (±1.

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“…Essa baixa eficiência pode resultar no comprometimento da capacidade de autodepuração do corpo receptor, especialmente pelo aporte de nutrientes e organismos patogênicos, removidos apenas parcialmente em sistemas de tratamento secundário (VON SPERLING, 2016). Os efluentes geralmente impactam a qualidade da água próximo aos pontos de lançamento, pois reduzem os níveis de oxigênio dissolvido (OD) e podem afetar negativamente a biodiversidade do local (BEGA et al, 2021;SOUZA et al, 2020;RIBEIRO et al, 2020). Nesse contexto, a presente pesquisa teve por objetivo avaliar a qualidade da água do rio Paraná antes do início do lançamento dos efluentes tratados pelo emissário da ETE, a fim de fornecer uma base documental e subsídios para futuras discussões e avaliações das alterações de qualidade da água do rio Paraná.…”

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“…Contudo, um diagnóstico realizado pela Sanesul (2020a) demonstrou eficiência de tratamento de apenas 48% (eram esperados 85%) e levantou a hipótese de a ETE ter contribuído para a deterioração da qualidade do corpo receptor.A qualidade da água do córrego Rondinha expõe a situação da poluição dos recursos hídricos como resultado da falta ou ineficiência dos sistemas de esgotamento sanitário no Brasil. Diversos estudos avaliaram a qualidade da água de ambientes aquáticos superficiais sujeitos a interferências antrópicas e demonstraram os impactos do lançamento de efluentes fora dos padrões de qualidade, especialmente os que não passam por processos de tratamento(BEGA et al, 2020;BEGA et al, 2021;LAUVERS et al, 2019;MORAES et al, 2021;ZAMBRANO et al, 2017). Tal cenário gera impactos diretos na qualidade de vida da população e representa um risco à saúde pública.…”

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Qualidade da água do rio Paraná em região de balneabilidade: discussão sobre os impactos potenciais do lançamento de efluentes provenientes de tratamento secundário

Ribeiro

Bega

Zambrano

et al. 2022

Eng. Sanit. Ambient.

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RESUMO A nascente do rio Paraná passou a ser receptora dos efluentes da estação de tratamento de esgoto de Aparecida do Taboado, Mato Grosso do Sul, em um projeto iniciado em 2013 e concluído em 2020. O emissário localiza-se a montante de um balneário. A pesquisa objetivou monitorar a qualidade da água do rio de agosto de 2019 a fevereiro de 2020, antes do lançamento. Foram utilizados o índice de qualidade das águas da Companhia Ambiental do Estado de São Paulo (CETESB) e seus parâmetros de cálculo. A água do rio apresentou boa qualidade (índice de qualidade das águas ≥72) e ausência de Escherichia coli. Apesar disso, 57 e 61% das amostras não atenderam à Resolução do Conselho Nacional do Meio Ambiente CONAMA nº 357/05 para demanda bioquímica de oxigênio e fósforo total, respectivamente. O potencial de impactos negativos na qualidade da água está relacionado aos parâmetros demanda bioquímica de oxigênio, fósforo total e Escherichia coli, e o lançamento pode resultar na deterioração da qualidade da água do rio, comprometendo seus usos múltiplos.

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Uso da cafeína como indicador de poluição por esgoto doméstico em corpos d’água urbanos

Cited by 9 publications

References 27 publications

Temporal changes in the water quality of urban tropical streams: An approach to daily variation in seasonality

Temporal changes in the water quality of urban tropical streams: An approach to daily variation in seasonality

Water Quality and the Impact by Contaminants of Emerging Concern: The Case of Verde River in Campos Gerais

Qualidade da água do rio Paraná em região de balneabilidade: discussão sobre os impactos potenciais do lançamento de efluentes provenientes de tratamento secundário

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