Assessment of fecal sterols in Barigui River sediments in Curitiba, Brazil

Froehner, Sandro; Martins, Raquel Fernandes; Errera, Marcelo Risso

doi:10.1007/s10661-008-0559-0

Cited by 49 publications

(30 citation statements)

References 24 publications

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“…It is emphasized that this sample (site P1) is located in a less populated area and contains much riparian vegetation. Previous results tracking this station showed the absence of fecal coliforms in water (Froehner et al 2008a(Froehner et al , b, 2009). The other sites (P2, P3, P5, and P6) showed lower values than P4 point, but concentrations are higher than at point P1.…”

Section: Lipid Contentmentioning

confidence: 69%

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Sediments as a potential tool for assessment of sewage pollution in Barigüi River, Brazil

Froehner

Maceno

Martins

2009

Environ Monit Assess

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Sediments constitute a pollutant trap and have proven to be an efficient tool to identify environmental impacts. Sediments are considered a very important means to assess the level of contamination of water bodies because of their ability to accumulate metals and organic. The anthropogenic inputs of sewage, with or without prior treatment, in aquatic environments, affect the geochemical composition of sediment. In addition, the sediment adsorbs hydrophobic compounds found in feces, such as the fecal sterols. The granulometric and geochemical composition of the sediment of Barigüi River-Brazil was investigated. The results show that silt and clay dominate the granulometric composition of the sediments. The geochemical composition of sediments showed high concentrations of phosphorus and nitrogen. The Redfield ratios confirm the inputs of phosphorus and nitrogen. The TOC/N ratio was used to identify the source of pollution. N/TP ratios were found between 1.0 and 3.5. Clearly, an input of phosphorus, sewage is the most acceptable source, following the historic profile of the Barigüi River. High concentration of nitrogen phosphorus labels the area to be polluted by sewage. To confirm the sewage pollution, adsorbed fecal sterols in sediments were investigated. The concentration of total sterols was found between 0.86 and 304.58 μg g(-1). Two distinguished scenario was found, one severely polluted and another slightly polluted. The highest concentrations of total fecal sterols were associated with sediment whose geochemical composition showed higher levels of TOC, as well as higher proportions of silt and clay. Also, epicoprostanol, a coprostanol isomer, was used as an indicator of the level of treatment or age of the fecal matter because it is formed during the treatment of wastewater and sludge digestion. If the treatment of sludge takes a long time, epicoprostanol can form from cholesterol, and relative proportions of those compounds may be used as an indicator of the presence of untreated sewage in the sediments. The epicoprostanol was found in the range between 0.02 and 9.71 μg g(-1); concentration of up to 0.015 μg g(-1) represents situations where there is strong contamination by sewage. All sites investigated showed a concentration of epicoprostanol higher than the value adopted as threshold. The lower concentration of epicoprostanol found for all sites is consistent with the high concentration found for coprostanol, and this is typical for untreated sewage.

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Section: Lipid Contentmentioning

confidence: 69%

“…Epicocoprostanol may be formed during the process of sewage degradation. Epicocoprostanol can also be formed from coprostanol during the microbial digestion process (Froehner et al 2008a(Froehner et al , b, 2009.…”

Section: Introductionmentioning

confidence: 99%

Sediments as a potential tool for assessment of sewage pollution in Barigüi River, Brazil

Froehner

Maceno

Martins

2009

Environ Monit Assess

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“…Sediments can be used to reconstruct the past and in particular to identify the impact of human population growth and land settlement. For example, since the middle of the last century, it has been possible to identify numerous pollutants in lake sediments, which reflect the demand for hydrocarbon consumption and other anthropogenic chemicals in modern society (Souza et al, 2011;Froehner et al, 2009;Venturini et al, 2008;Chen et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Sedimentary record of PAHs in the Barigui River and its relation to the socioeconomic development of Curitiba, Brazil

Machado¹,

Figueira²,

Côcco³

et al. 2014

Science of The Total Environment

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“…Stigmastanol , coprostanol (Tyagi et al, 2008) (Volkman et al, 1986). , (Volkman et al, 1998;Froehner et al, 2009 . Kim et al (2011) 15 , , ,…”

Section: 분변계 스테롤 분석mentioning

confidence: 99%

Sterols as Indicators of Fecal Pollution in Sediments from Shellfish Farming Areas (Yeoja Bay and Gangjin Bay) of Korea

Choi¹,

Lee²,

Hwang³

et al. 2013

Korean Journal of Fisheries and Aquatic Sciences

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Eight fecal sterols were analyzed in surface sediments collected from shellfish farming areas in Yeoja Bay and Gangjin Bay, Korea, to evaluate sewage-derived fecal pollution. The concentrations of coprostanol, a good marker of sewage-derived organic contamination, in sediments were in the range of 10-530 ng/g-dry in Yeoja Bay, and 10-190 ng/g-dry in Gangjin Bay. Coprostanol levels were markedly higher in the inner bay than in the outer bay. These levels were lower than those reported in urbanized bays in Korea, however, they were comparable to levels in other shellfish farming areas including Gamak Bay. A multivariate analysis of the ratios of other sterols suggested that the sterols originated from sewage and plankton/benthos. Sewage was the dominant source at stations located close to the river mouth and wastewater treatment plant (WWTP) outfalls, and plankton/benthos was the primary source in the outer bay. These results suggest that management of point sources, e.g., WWTP as well as non-point sources, e.g., riverine inputs is important for improving the water quality in Yeoja Bay and Gangjin Bay.

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Assessment of fecal sterols in Barigui River sediments in Curitiba, Brazil

Cited by 49 publications

References 24 publications

Sediments as a potential tool for assessment of sewage pollution in Barigüi River, Brazil

Sediments as a potential tool for assessment of sewage pollution in Barigüi River, Brazil

Sedimentary record of PAHs in the Barigui River and its relation to the socioeconomic development of Curitiba, Brazil

Sterols as Indicators of Fecal Pollution in Sediments from Shellfish Farming Areas (Yeoja Bay and Gangjin Bay) of Korea

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