Avaliação ecotoxicológica da água e sedimento de tributários do reservatório de Barra Bonita (Médio Tietê Superior - SP)

Costa, Juliana Berninger da

doi:10.11606/d.18.2001.tde-22122015-161004

Cited by 5 publications

(5 citation statements)

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“…Some studies have demonstrated the importance of the quantification of metals in sediments, since this compartment may be subject to a dynamic that enables resuspension or release these to the water column, making them bioavailable to organisms in the aquatic environment (Costa and Espíndola, 2000;Siqueira and Braga, 2000;Ishikawa et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Preliminary assessment of pseudo-total and bioavailable metals in depth in the sediment of Luíz Rau stream in Novo Hamburgo (RS)

2015

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The Luíz Rau stream is one of the main streams of Novo Hamburgo. In the stream industrial effluents are released from various sectors, from paint and adhesive industries, metallurgy and leather industry, besides receiving a large amount of domestic sewage. The emissions of these pollutants contribute to decrease water and sediment quality. Within this context, this study evaluated the conditions of the Luíz Rau stream bed sediments, with the determination of the metals like cadmium, lead, chromium and nickel, in depth. To perform the evaluation three points were chosen for sampling along the stream course. The sampling sites were identified as Point A, in Roselândia district and this corresponds to one of the springs and therefore considered as reference value, Point B, in Santo Afonso district being a midpoint of the stream, and Point C also located in Santo Afonso district, near the outfall in Rio dos Sinos river. Cadmium was not detected in any point. At the A and C points chromium was the metal observed in higher concentration in the sediment, up to 45.14 mg kg -1 concentration. In the B point, the metal that was observed in the highest amount was nickel in the concentration of 20.69 mg kg -1 .Keywords: sediment, Luíz Rau stream, environmentally available metals, collection of sediment in depth. Avaliação preliminar de metais pseudo-totais e biodisponíveis em profundidade no sedimento do arroio Luíz Rau em Novo Hamburgo (RS)Resumo O arroio Luíz Rau é um dos principais arroios de Novo Hamburgo, e um importante afluente do Rio dos Sinos. Nele são lançados efluentes industriais dos mais diversos setores, desde indústrias de tintas e adesivos, metalurgia e da indústria do couro, além de receber uma grande quantidade de esgoto doméstico. As emissões destes poluentes contribuem para uma diminuição na qualidade da água e dos sedimentos. Dentro deste contexto, este trabalho avaliou as condições do sedimento do arroio Luíz Rau, com a determinação dos metais cádmio, chumbo, cromo e níquel em profundidade, nas formas pseudo-total e biodisponível. Para a realização desta avaliação, foram escolhidos três pontos para coleta de amostras ao longo do percurso do arroio. Os pontos foram identificados por Ponto A, no bairro Roselândia, sendo que este corresponde a uma das nascentes e por isso considerado como ponto branco, o Ponto B, no bairro Santo Afonso, sendo um ponto intermediário do arroio, e o Ponto C, também localizado no bairro Santo Afonso, próximo à foz, junto ao Rio dos Sinos. O cádmio não foi detectado em nenhum dos pontos amostrados. Nos pontos A e C, o cromo foi o metal observado em maior concentração no sedimento, com concentração de até 45,14 mg kg Palavras-chave: sedimento, arroio Luíz Rau, biodisponibilidade de metais, coleta de sedimentos em profundidade.

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Section: Introductionmentioning

confidence: 99%

Preliminary assessment of pseudo-total and bioavailable metals in depth in the sediment of Luíz Rau stream in Novo Hamburgo (RS)

2015

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“…Toxicity tests are widely used, but a great majority is restricted to aquatic compartment, even though the importance of sediment to aquatic ecosystems is now recognized (COSTA and ESPÍNDOLA, 2000). Although tests with surface water, groundwater, industrial and domestic wastewater, are responsible for the detection of toxic substances and control the level of pollutants entering the aquatic ecosystems, monitoring should also include sediment, because it has a high ability to accumulate compounds that may eventually be released to the water column due to changes (physical, chemical and biological -bioturbation) in environmental conditions (ADAMS et al, 1992;INGERSOLL, 1995).…”

Section: Introductionmentioning

confidence: 99%

“…The char- acterization of aquatic systems needs to go beyond routine analyses to evaluate the overall effects of pollutants on the environments and organisms. The evaluation of effects on the biological components through biomonitoring and toxicity tests is a more effective tool for predicting or detecting several types of impacts (COSTA and ESPÍNDOLA, 2000).Toxicity tests are widely used, but a great majority is restricted to aquatic compartment, even though the importance of sediment to aquatic ecosystems is now recognized (COSTA and ESPÍNDOLA, 2000). Although tests with surface water, groundwater, industrial and domestic wastewater, are responsible for the detection of toxic substances and control the level of pollutants entering the aquatic ecosystems, monitoring should also include sediment, because it has a high ability to accumulate compounds that may eventually be released to the water column due to changes (physical, chemical and biological -bioturbation) in environmental conditions (ADAMS et al, 1992;INGERSOLL, 1995).…”

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confidence: 99%

Rural and Urban Streams: Anthropogenic Influences and Impacts on Water and Sediment Quality

Kühl

Rocha

Espíndola

et al. 2010

International Review of Hydrobiology

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The Pirapó river watershed (Paraná State, Brazil) compounds a relatively industrialized and urbanized region, undergoing great pressure from the discharge of industrial, agricultural and domestic wastes. We evaluated the environmental quality of ten streams belonging to this watershed in April and June 2008 by performing acute and chronic toxicity tests with Daphnia similis and Ceriodaphnia silvestrii from water and sediment samples. We tested the hypothesis that the streams located in urban areas are more exposed to the influence of pollutants, than those outside the city limits. In addition, we obtained the measures of physical and chemical parameters, and identified the main polluted sources. Contrary to what was expected, the rural streams were more toxic than those located in urban area. These results demonstrate that the water bodies located in rural areas are being affected by the pollution of aquatic ecosystems as far as those found in urban areas, requiring the same attention of environmental managers in relation to its monitoring. IntroductionThe increasing contamination of aquatic, terrestrial and atmospheric environments with substances from human activities has attracted attention from political organizations and environmental managers, as well as from society as a whole. Many researchers have searched for solutions through effluent treatment, solid waste recycling and clean energy production. In spite of their efforts, many counties still do not possess sewage collection networks that include all inhabitants or suitable local systems for garbage disposal. Hence, some domestic discharges and industrial effluents reach watercourses untreated, causing environmental damage.Due to the complexity and variability of organic and inorganic compounds that enter water bodies and because little information about the interactions between these substances is known, it is not possible to establish allowable discharged concentrations using only the physical and chemical analyses commonly performed by environmental managers. The char- acterization of aquatic systems needs to go beyond routine analyses to evaluate the overall effects of pollutants on the environments and organisms. The evaluation of effects on the biological components through biomonitoring and toxicity tests is a more effective tool for predicting or detecting several types of impacts (COSTA and ESPÍNDOLA, 2000).Toxicity tests are widely used, but a great majority is restricted to aquatic compartment, even though the importance of sediment to aquatic ecosystems is now recognized (COSTA and ESPÍNDOLA, 2000). Although tests with surface water, groundwater, industrial and domestic wastewater, are responsible for the detection of toxic substances and control the level of pollutants entering the aquatic ecosystems, monitoring should also include sediment, because it has a high ability to accumulate compounds that may eventually be released to the water column due to changes (physical, chemical and biological -bioturbation) in environmental condit...

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“…Vários trabalhos (COSTA, 2001;RODGHER, 2001;PASCHOAL, 2002;FRACÁCIO, 2001) tem comprovado a toxicidade dos sedimentos dos reservatórios de Barra Bonita e Promissão.…”

Section: Toxicidade Do Látex De Asclepias Curassavicaunclassified

Estudos ecológicos e ecotoxicológicos de Melanoides tuberculata Müller, 1774 (Gastropoda, Thiaridae), espécie exótica para a região neotropical

Okumura¹

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Ao CNPq pela concessão da bolsa de mestrado. À Renata, que muito me ensinou e com quem foi maravilhoso ter convivido num clima de amizade e cooperação. À amiga e colega de tantas provações e dificuldades que tornou essa fase mais fácil e muito mais divertida. Obrigada, Fer. À Emanuela e Mariana pelo auxílio no laboratório e pelos momentos de descontração. À Edna e Malu pela boa vontade e carinho com que sempre agiram, quando solicitadas.

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Avaliação ecotoxicológica da água e sedimento de tributários do reservatório de Barra Bonita (Médio Tietê Superior - SP)

Cited by 5 publications

References 0 publications

Preliminary assessment of pseudo-total and bioavailable metals in depth in the sediment of Luíz Rau stream in Novo Hamburgo (RS)

Preliminary assessment of pseudo-total and bioavailable metals in depth in the sediment of Luíz Rau stream in Novo Hamburgo (RS)

Rural and Urban Streams: Anthropogenic Influences and Impacts on Water and Sediment Quality

Estudos ecológicos e ecotoxicológicos de Melanoides tuberculata Müller, 1774 (Gastropoda, Thiaridae), espécie exótica para a região neotropical

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