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| Registros recuperados: 54 | |
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| SAMPAIO, F. G.; BOIJINK, C. de L.; RANTIN, F. T.. |
| O aumento mundial da contaminação de sistemas de água doce com inúmeros compostos químicos industriais e naturais é hoje um dos principais problemas ambientais.Mineração, emissão de esgoto doméstico, aplicação de fertilizantes e pesticidas degradam severamente os ecossistemas aquáticos com metais pesados. A aquicultura, caracterizada nas últimas décadas como potencial atividade agropecuária não está isenta desta negativa contribuição, uma vez que utiliza, em sua cadeia produtiva, compostos que interferem diretamente na cadeia trófica dos sistemas aquícolas. Dentre os principais produtos utilizados na piscicultura, para contornar as dificuldades no processo produtivo, pode-se citar o sulfato de cobre (CuSO4) que, quando utilizado indevidamente, gera efeitos... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Ecossistema aquático; Aquicultura.; Sulfato de cobre; Poluição da água; Peixe de água doce; Toxidez.; Copper sulfate; Water pollution; Toxicity; Freshwater fish; Fish culture. |
| Ano: 2013 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/963179 |
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| SCORZA JUNIOR, R. P.; LANA, J. T. de O.; SILVA, G. B. S. da; LOEBMANN, D. G. dos S. W.; ALMEIDA, E. G. de. |
| Estudos de monitoramento dos resíduos de agrotóxicos em ? águas superficiais são necessários para avaliar os níveis de exposição de organismos não alvos, incluindo os seres humanos. Este trabalho teve como objetivo monitorar resíduos de 46 diferentes agrotóxicos e seus produtos de degradação em amostras de água do Rio Dourados, Mato Grosso do Sul. Amostras foram coletadas mensalmente ou quinzenalmente, em três pontos de amostragem, durante o período de dezembro de 2019 a dezembro de 2020. Para análise, utilizou-se um método multirresíduo, com extração em fase sólida (SPE) e separação e identificação com cromatografia líquida de ultraperformance acoplada à espectrometria de massas (UPLC-MS-MS). Os limites de quantificação (LQ) para os diferentes agrotóxicos... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Contaminação; Meio Ambiente Aquático; Águas Pluviais; Águas Superficiais; Pesticida; Recurso Hídrico; Aquatic environment; Pesticides; Water pollution; River water. |
| Ano: 2021 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1130741 |
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| Mercier, Grégoire; Ardhuin, Fanny. |
| Spaceborne synthetic aperture radar (SAR) is well adapted to detect ocean pollution independently from daily or weather conditions. In fact, oil slicks have a specific impact on ocean wave spectra. Initial wave spectra may be characterized by three kinds of waves, namely big, medium, and small, which correspond physically to gravity and gravity-capillary waves. The increase of viscosity, due to the presence of oil damps gravity-capillary waves. This induces not only a damping of the backscattering to the sensor but also a damping of the energy of the wave spectra. Thus, local segmentation of wave spectra may be achieved by the segmentation of a multiscale decomposition of the original SAR image. In this paper, a semisupervised oil-slick detection is... |
| Tipo: Text |
Palavras-chave: Water pollution; Synthetic aperture radar; Sea surface; Satellite applications; Oil spill; Image analysis. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1948.pdf |
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| Yao, K.M.; Kouassi, A.M.; Kouassi, B.; Koné, Y.J.-M.; Inza, B.; Soro, B.M.; Trokourey, A.. |
| Cette étude est la première à estimer la vitesse de la croissance annuelle des concentrations en ions phosphates dans les eaux de la lagune Ebrié. Elle donne des résultats jusque-là inconnus des tendances annuelles de la qualité des eaux estuariennes en ce qui concerne le phosphore.Bien qu'il soit trop tôt de déduire avec certitude ces tendances sur la base de quatre années de mesure,il apparaît évident que l'utilisation des engrais agricoles est en train de s'intensifier dans le bassin versant de la lagune Ebrié avec pour conséquences une augmentation significative de la vitesse de croissance des phosphates dans la zone estuarienne de la lagune Ebrié. Dans le contexte actuel de la gestion rationnelle de la qualité des eaux côtières menacées par... |
| Tipo: Journal Contribution |
Palavras-chave: Water pollution; Estuarine chemistry. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/5818 |
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| Oyewo, E.O.. |
| Laboratory-scale studies on the initial weathering of some oils on water by evaporative loss and dissolution have been carried out. Evaporation rate was dependent on the type of oil and was accelerated by increased temperature, number retarded evaporation rate. The order of evaporation rate was Gas Oil >Diesel Oil > Medium fuel Oil. Dissolution rate, which varied with the type of oil, was retarded by salinity but promoted by increased temperature. With the mono-component oils tested, the cyclic, aromatic and iso-characters increased dissolution rate. The order of dissolution rate for the commercial oils was Gas Oil Diesel Oil > Medium Fuel Oil. |
| Tipo: Report |
Palavras-chave: Oil pollution; Water pollution; Water pollution; Http://aims.fao.org/aos/agrovoc/c_8321. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/2445 |
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| Nwilo, P.C.; Badejo, O.T.. |
| Nigeria, one of the world’s largest oil exporters, has a coastline of approximately 853km facing the Atlantic Ocean. This coastline lies between latitude 4o 10’ to 6o 20’ N and longitude 2o 45’ to 8o 35’ E. The Nigerian coast is composed of four distinct geomorphology units namely the Barrier-Lagoon Complex; the Mud Coast; the Arcuate Niger Delta and the Strand Coast. 90-95% of export revenues in Nigeria is from the oil sector. Nigeria’s oil reserves are about 31.5 billion barrels, while Nigeria’s crude oil production averaged 2.118 million barrels per day in 2002. Oil spillage is a major environmental problem in Nigeria. Between 1976 and 1996 Nigeria recorded a total of 4835 oil spill incidents, which resulted in a loss of 1,896,960 barrels of oil to the... |
| Tipo: Working Paper |
Palavras-chave: Oil spills; Ecosystems; Water pollution. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/267 |
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| Ajao, E.A.. |
| Bioassay tests were conducted with wastewater effluents from a textile mili and a detergent packing plant using the hermit crab. Clibinarius africanus. (Aurivillus) as experimental animal. LC50 values were evaluated using static testing procedures for 24, 48 and 96 hour. For the textile effluent, means of 79.0, 50.24 and 51.81 percentage effluent by volume were obtained in respect of crabs in the “medium” weight range (0.3 – 0.7grams) for the test periods. For the “detergent wash”, 95.16, 85.00 and 82.33 percentage effluent by volume represented means of values obtained for “small” size crabs (weight range 0.08–0.24 grams) and 96.0, and 81.50 percentage effluent by volume for ‘medium’ size crabs for 24, 48 and 96 hour respectively. Spearman’s Rank... |
| Tipo: Report |
Palavras-chave: Pollutants; Water pollution; Pollutants; Water pollution; Http://aims.fao.org/aos/agrovoc/c_6076; Http://aims.fao.org/aos/agrovoc/c_8321. |
| Ano: 1985 |
URL: http://hdl.handle.net/1834/2440 |
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| Registros recuperados: 54 | |
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