Physico-chemical and biological studies on water from Aries River (Romania)

Butiuc-Keul, Anca; Momeu, Laura; Crăciunaş, C.; Dobrotă, Cristina; Cună, Stela; Balas, Gabriela

doi:10.1016/j.jenvman.2011.04.017

Cited by 10 publications

(8 citation statements)

References 14 publications

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“…In August, the Olt River water starts in ID 1 at − 9.67 ‰ for δ 18 O value enriching in ID 2 to − 9.56 ‰, depleting in ID 7 to − 9.73 ‰, enriching to − 9.36 ‰ in ID 10 and depleting again to Olt River Tributaries -points 3, 4, 5, 6,9,11,12,14,15,16,17 (c) Figure 6. δ 18 O and δ 2 H temporal variation for the middle Olt River and its tributaries.…”

Section: Spatial Distribution Of 2 H and 18 Omentioning

confidence: 99%

“…There are several studies published on isotopic investigations of Romanian rivers [8][9][10][11][12], some with emphasis on the use of tritium as a tracer in the environment [13,14], but only few regarding the Olt River [15]. In this paper we focused on the middle watershed of the Olt River (Romania), a Danube tributary, presenting the results of isotopic investigations conducted during seasonal campaigns between November 2010 and August 2011.…”

Section: Introductionmentioning

confidence: 99%

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Isotopic fingerprint of the middle Olt River basin, Romania

Popescu

Costinel

Ionete

et al. 2014

Isotopes in Environmental and Health Studies

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One of the most important tributaries of the Danube River in Romania, the Olt River, was characterized in its middle catchment in terms of the isotopic composition using continuous flow-isotope ratio mass spectrometry (CF-IRMS). Throughout a period of 10 months, from November 2010 to August 2011, water samples from the Olt River and its more important tributaries were collected in order to investigate the seasonal and spatial isotope patterns of the basin waters. The results revealed a significant difference between the Olt River and its tributaries, by the fact that the Olt River waters show smaller seasonal variations in the stable isotopic composition and are more depleted in (18)O and (2)H. The waters present an overall enrichment in heavy isotopes during the warm seasons.

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Section: Spatial Distribution Of 2 H and 18 Omentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Isotopic fingerprint of the middle Olt River basin, Romania

Popescu

Costinel

Ionete

et al. 2014

Isotopes in Environmental and Health Studies

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“…This scenario is mainly constructed by the large amount of domestic sewage produced by urban basins (Gillis, 2012;Janse et al, 2015;Konzen et al, 2015;Benvenuti et al, 2015), intensified by rainfall that potentializes the concentration of nitrogen and phosphate compounds leading to a general eutrophication state (Cunha et al, 2010;Paula et al, 2010;Butiuc-Keul et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, the LAS is deposited in the sediment causing aquatic pollution (Lewis, 1992;Delforno et al, 2014;Butiuc-Keul et al, 2012). Concerning surfactant toxic effects, the values recorded are harmful to the metabolism of fish.…”

Section: Discussionmentioning

confidence: 99%

Aquatic life protection index of an urban river Bacanga basin in northern Brazil, São Luís - MA

et al. 2016

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Bacanga River Basin faces environmental problems related to urbanization and discharge of untreated domestic sewage, which compromise its ecosystem health. Due to the small number of studies that assessed its water quality, the present study aimed to assess the current status of this ecosystem based on the aquatic life protection index. Samples were carried out every two months, in a total of six events, in six sites along the basin, where the water samples were collected to assess physicochemical parameters and calculate the trophic state index and the index of minimum parameters for the protection of aquatic communities. The data were also compared with values determined by the resolution National Environment Council -CONAMA 357/05. Our results reveal significant changes in the water quality of Bacanga River Basin. An increase in nutrients and chlorophyll-a concentration led it to eutrophication. The surfactant values were high and put in danger the aquatic biota. Dissolved oxygen rates were below the values allowed by the resolution in most sites sampled. The current water quality is terrible for the protection of aquatic life in 61.92% of the sites sampled.Keywords: water quality, contamination, domestic sewage. Índice de proteção da vida aquática em uma bacia urbana do rio Bacanga no norte do Brasil, São Luís -MA ResumoA Bacia Hidrográfica do rio Bacanga (BHRB) apresenta problemas ambientais relacionados a urbanização e lançamentos de esgoto in natura que comprometem a qualidade desse ecossistema. Devido ao reduzido número de estudos associados à avaliação da qualidade da água no local, este estudo teve como objetivo avaliar a situação atual desse ecossistema por meio do Índice de Proteção da Vida Aquática. Seis amostragens bimestrais foram realizadas em seis pontos ao longo da bacia, coletando parâmetros físico-químicos para a aplicação do Índice de Estado Trófico e Índice de Parâmetros Mínimos para a Proteção da Vida Aquática, relacionando-os com a resolução Conselho Nacional do Meio Ambiente -CONAMA/357. Os resultados revelaram alterações significativas na qualidade da água da BHRB, o aumento de nutrientes e das concentrações de clorofila-a conduziram ao um estado geral de eutrofização. Os valores de surfactantes foram altos colocando em risco a biota aquática e as taxas de oxigênio dissolvido estiveram abaixo do permitido pela resolução na maioria dos pontos amostrados. A situação atual da qualidade da água para proteção da vida aquática é péssima em 61,92% dos pontos amostrados.Palavras-chave: qualidade da água, contaminação, efluentes domésticos.

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“…Current research focuses mainly on identifying pollution sources and determining the contributions of these sources (Peterson et al, 2001;Setzinger et al, 2002;Master et al, 2003;Segal-Rozenhaimer et al, 2004;Reinhardt et al, 2006;Nestler et al, 2011;Kanduc et al, 2012;Widory et al, 2013). As for isotopic investigations on the rivers in Romania, there are several published studies (Cuna et al, 2001;Costinel et al, 2009;Vremera et al, 2011;Butiuc-Keul et al, 2012), some with emphasis on the use of tritium as a tracer in the environment (Varlam et al, 2010;Faurescu et al, 2011), only few regarding the Olt River (Dinu et al, 2000;Popescu et al, 2014) and none on the subject of pollution source identification using the δ 15 N fingerprint. For this reason, the paper investigates the sources and transformations of inorganic nitrogen compounds (nitrate, nitrite and ammonium) in the middle Olt River basin, near the industrial area of Ramnicu Valcea, by applying a combination of physico-chemical and isotopic techniques, to determine if there are major industrial nitrogen releases in the environment.…”

Section: Introductionmentioning

confidence: 99%