Sewage contamination of sediments from two Portuguese Atlantic coastal systems, revealed by fecal sterols

Rada, Jesica Paola; Duarte, Armando C.; Pato, P.; Cachada, Anabela; Carreira, Renato S.

doi:10.1016/j.marpolbul.2016.01.010

Cited by 28 publications

(19 citation statements)

References 29 publications

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“…Coprostanol was widely distributed in sediments of the reservoir, ranging from 0.11 μg g −1 to 1.24 μg g −1 , with the average concentration of 0.51 μg g −1 , which was similar to the concentrations of coprostanol in sediments of rivers of Serbia and Ulungur Lake in northern Xinjiang [39,40]. Generally, the concentration of coprostanol has been used to assess the sewage pollution level, and the maximum threshold of sewage contamination used in previous studies was 0.7 μg g −1 [20,30]. Hence, we considered 0.7 μg g −1 as the threshold of sewage contamination in our study.…”

Section: Journal Of Chemistrysupporting

confidence: 63%

“…Particularly, coprostanol is considered as a major sign of fecal contamination, and a positive connection has been found between levels of coprostanol and abundance of fecal bacteria in previous studies [17,18]. Moreover, various thresholds of coprostanol concentrations (such as 0.1, 0.5, or 0.7 μg g −1 ) were proposed to indicate sewage contamination in aquatic sediments [19][20][21]. Phytosterols are mainly found in the seeds of plants, including sitosterol, stigmasterol, and campesterol.…”

Section: Introductionmentioning

confidence: 98%

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Distributions and Sources of Sedimentary Sterols as well as Their Indications of Sewage Contamination in the Guanting Reservoir, Beijing

Wen

Bai

Zhang

et al. 2020

Journal of Chemistry

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In this study, domestic sewage contamination in the Guanting Reservoir, one of the major water source reservoirs of Beijing, was examined using sterols as tracing molecular markers. Nineteen sediment samples in seven cross-sections in the Guanting Reservoir were collected, extracted, and analyzed by gas chromatography-mass spectrometry (GC-MS). Seven different sterols were identified and quantified from the surface sediment samples in the Guanting Reservoir. The total sterols in sediments of the reservoir ranged from 2.78 μg g−1 to 40.31 μg g−1 with the average concentration of 13.53 μg g−1. Concentrations of fecal sterols, coprostanol and epicoprostanol in the Guishui River reservoir area were generally higher than in the Yongding River reservoir area. The average concentrations of coprostanol and epicoprostanol in the Yongding River reservoir area were 0.41 μg g−1 and 0.34 μg g−1, respectively. The average concentrations of coprostanol and epicoprostanol in the Guishui River reservoir area were 0.72 μg g−1 and 0.70 μg g−1, respectively. Ratios of sterols indicated higher sewage pollution in regions close to river mouths and reservoir banks. Principal component analysis (PCA) indicated three distinct sources of sterols from domestic sewage, phytoplankton, and terrestrial higher plants. This article identified the current situation of sewage contamination in sediments of the Guanting Reservoir, which could provide important references for further implementation of pollution control and basin management in the region.

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Section: Journal Of Chemistrysupporting

confidence: 63%

Section: Introductionmentioning

confidence: 98%

Distributions and Sources of Sedimentary Sterols as well as Their Indications of Sewage Contamination in the Guanting Reservoir, Beijing

Wen

Bai

Zhang

et al. 2020

Journal of Chemistry

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“…Population pressure and industrialization have increased over the past decades, impacting the system's ecohydrology, habitats, and associated human activities. Water pollution issues include those associated with diffuse source pollution land use and agricultural activities [74,75], sewage treatment systems [66,76] and industrial activities [77], contamination of aquaculture resources [78], The Ria de Aveiro includes a hierarchy of environmental protection statutes, including "nature reserve", "national ecological reserve", and "Natura 2000 network" under the Birds (2009/147/EC, 30.11) and Habitats Directives (92/43/EEC, 25.5). Due to its low altitude and the flat topography of its marginal lands, the Ria de Aveiro is prone to large sedimentary deposition supplied from rivers, especially in flood seasons [68], as well as to tides, floods, storm surges, and upstream extreme events [69].…”

Section: Background Featuresmentioning

confidence: 99%

Governance for Sustainability of Estuarine Areas—Assessing Alternative Models Using the Case of Ria de Aveiro, Portugal

Fidélis

Teles

Roebeling

et al. 2019

Water

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Estuaries are one of the most productive and complex types of ecosystems supporting a wide range of economic activities. Departing from a set of governance problems and emergent goals, such as sustainability or climate change adaptation faced by an estuarine case study area, Ria de Aveiro, in Portugal, this article assesses the adequacy of alternative governance models under the existing water resources legal framework and traditional political culture. It shows that apart from the centrally-based compliance model, all other alternatives require high degrees of institutional reforms. Moreover, although the model based on a dedicated new agency, long preferred by many users of Ria de Aveiro, is the most understandable and focused, it does not assure the pursuance of adaptability or collaboration, which are considered essential for estuary governance. As it relies on collective action and multi-level and multi-agent contexts, estuarine governance may require a new institutional design. Where one begins a process of institutional change, however, is not a simple issue to address and demands a deeper analysis, particularly on the types of required institutional changes, as well as on their impacts on policy and decision-making outcomes over estuarine environments and associated socio-ecological networks.

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“…However, concentrations were lower than those found in the State of Rio de Janeiro as in Araruama Lagoon, Guanabara Bay, Santos Bay and in another countries like Dorchester Bay and Ria de Aveiro Lagoon. 22,57,58,60,68 The Araruama Lagoon, a hypersaline lagoon that underwent a disordered occupation process in its surroundings, receives a large input of organic matter from domestic sewage; the Guanabara Bay, an estuary also located in the urban area of Rio de Janeiro that receives sewage from several rivers flowing in its waters; the Santos Bay in São Paulo and other regions in the world, such as the Dorchester Bay in the USA and Ria de Aveiro lagoon in Portugal, environments under sewage discharge due to urbanization and terrestrial runoff process. The more intense urbanization process and the large amounts of domestic and industrial effluents may be the reason for the higher coprostanol values in those regions.…”

Section: Distribution Of Sterolsmentioning

confidence: 99%

“…19 Sterols can be good indicators of domestic effluents present in aquatic environments 20 and have been used in several studies about coastal regions. [21][22][23] In addition, they can help to characterize the organic matter sources distinguishing plankton, higher plants, fungi and bacterial activity. [24][25][26] The importance of coastal lagoons as potential ecosystems for emission of greenhouse gases is related to the accumulation of different forms of organic carbon.…”

Section: Introductionmentioning

confidence: 99%

Organic Matter Composition Related to Methane Ebullitive Flux of an Urban Coastal Lagoon, Southeastern Brazil

Viana¹,

Santos²,

Bernardes³

et al. 2019

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In 2016, Brazil emitted 18.25 Tg of methane. Some of these emissions occur through continental aquatic ecosystems, locations of fate and accumulation of organic and inorganic matter. Thus, the aim of this study is to evaluate the origin of organic matter in Rodrigo de Freitas Lagoon, an eutrophic, coastal and chocked lagoon in Rio de Janeiro, Brazil, through the determination of n-alkanes and sterols compounds in the upper two centimeters of sediment and compare these data with methane ebullitive flux. The concentrations of n-alkanes varied between 2.43 and 25.82 µg g-1. C29 was predominant compound in most sites, but also with important petrogenic source evidenced by the occurrence of Unresolved Complex Misture. The total concentration of sterols ranged from 2.76 to 56.01 µg g-1. β-sitostanol was the most abundant compound and coprostanol was the most relevant at the sites under influence of domestic effluents. CH 4 ebullitive flux averaged 199 mg m-2 d-1 in the dry period and 9.3 mg m-2 d-1 during the wet season. We conclude that the organic matter reaching Rodrigo de Freitas Lagoon through the rivers discharge added or enriched with irregular sewage input and petroleum derivates are the main source of eutrophication and generate higher methane emissions to the atmosphere.

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Sewage contamination of sediments from two Portuguese Atlantic coastal systems, revealed by fecal sterols

Cited by 28 publications

References 29 publications

Distributions and Sources of Sedimentary Sterols as well as Their Indications of Sewage Contamination in the Guanting Reservoir, Beijing

Distributions and Sources of Sedimentary Sterols as well as Their Indications of Sewage Contamination in the Guanting Reservoir, Beijing

Governance for Sustainability of Estuarine Areas—Assessing Alternative Models Using the Case of Ria de Aveiro, Portugal

Organic Matter Composition Related to Methane Ebullitive Flux of an Urban Coastal Lagoon, Southeastern Brazil

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