Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 12
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Acumulación de metales pesados en microcrustáceos planctónicos provenientes de un embalse contaminado por relaves mineros, embalse Rapel (34° 10' S - 71° 29' W), Chile OceanDocs
Mercado Leal, S.I..
El embalse Rapel, es un cuerpo de agua que está siendo sometido a un fuerte impacto antropogénico, por lo que evidencia severos signos de eutrofización. Esto último debido a que el embalse se ha transformado en el cuerpo receptor de una gran diversidad de efluentes (industriales, agrícolas y domésticos), que evacuan sus descargas sin ningún tipo de tratamiento. A lo cual se le debe agregar la recepción de aguas provenientes de los relaves de la mina de cobre “El Teniente”. Con el objetivo de determinar la presencia y acumulación de metales pesados en el agua y en los organismos zooplanctónicos, durante el mes de Octubre del 2003 se tomaron muestras de agua y de ejemplares de Ceriodaphnia dubia, Bosmina chilensis y Diaptomus diabolicus. Como especies...
Tipo: Theses and Dissertations Palavras-chave: Heavy metals; Freshwater pollution; Water reservoirs; Water analysis; X-ray spectroscopy; Zooplankton; Man-induced effects.
Ano: 2004 URL: http://hdl.handle.net/1834/4899
Imagem não selecionada

Imprime registro no formato completo
Análisis de contaminantes inorgánicos tóxicos en las aguas del Rio Almendares, Cuba OceanDocs
Rodríguez, A.J.; Arpajón, I.; Castaño, Z.; Marsán, R.; Lugo, D.; Roevros, N.; Chou, L.; Rojas, N.; Heydrich, M..
The Almendares River constitutes the most important superficial stream in Cuban capital, that finishes in the Metropolitan Park of Havana, which is an entertaining centre. The objective of this work is to determine the presence of toxic inorganic pollutants in the Almendares River water. 10 samplings were carried out from June 2003 to May 2004 in 14 stations established along the last 10 km of the river and 3 tributaries. The quantification of nitrates, nitrites and ammonium was done by spectrophotometric methods The concentration of heavy metals in the dissolved and particulate phase was determined by atomic emission spectrometry. The total microbial charge was determined by epifluorescency. Were found high levels of ammonium and nitrites, as well as high...
Tipo: Proceedings Paper Palavras-chave: Rivers; Freshwater pollution; Heavy metals; Rivers; Heavy metals; Http://aims.fao.org/aos/agrovoc/c_6617; Http://aims.fao.org/aos/agrovoc/c_2223.
Ano: 2006 URL: http://hdl.handle.net/1834/2086
Imagem não selecionada

Imprime registro no formato completo
Calidad físico química y bacteriológica de las aguas alrededor de la ciudad de Guayaquil 1996 - 1998 OceanDocs
Valencia, M.; Palacios, C.; Rodríguez, A..
Siendo Guayaquil una de las ciudades más pobladas del Ecuador y de gran importancia en el desarrollo industrial del país, se determinó la necesidad de llevar a cabo un estudio de la calidad de aguas del río y esteros que bordean la ciudad, debido a que los asentamientos poblacionales e industriales han crecido descargando sus desechos a esos ecosistemas, sumándose a esto el déficit de los sistemas de alcantarillado. Se presenta los resultados de un estudio realizado en el Río Guayas desde el Muelle de la Unidad Nacional hasta la zona de las Esclusas considerando 9 estaciones ubicadas en 3 perfiles perpendiculares a las riberas del río a dos niveles de profundidad, superficie y 10 m., así como de la zona del Estero Salado comprendida entre el área de...
Tipo: Journal Contribution Palavras-chave: Water quality; River water; Water analysis; Nutrients (mineral); Dissolved oxygen; Petroleum hydrocarbons; Rivers; Marshes; Freshwater pollution; Brackishwater pollution; Estuaries; Water quality; Dissolved oxygen; Rivers; Estuaries; Water analysis; Marshes; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_36106; Http://aims.fao.org/aos/agrovoc/c_6617; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_16064; Http://aims.fao.org/aos/agrovoc/c_4631.
Ano: 2000 URL: http://hdl.handle.net/1834/2309
Imagem não selecionada

Imprime registro no formato completo
Capacidad de dilución del Río Guayas para contrarrestar el impacto por vertientes industriales terrestres OceanDocs
Suárez, P..
Una de las principales y mayores causas de la contaminación marina, es la falta de tratamiento de efluentes industriales antes de verterlos en los ríos, mares u océano, bajo este contexto, los ríos operan como verdaderos filtros y emplean sus características hidráulicas para tratar de diluir las aguas residuales de las industrias. Se considera entonces como área de estudio el Parque industrial Río Guayas sur de la ciudad de Guayaquil, tomando dos decargas industriales de considerable magnitud analizando tanto del Río Guayas como de estos efluentes industriales la DBO, DQO, OD, pH y Microbiología. Se correlaciona los valores resultado de los ensayos para evaluar la contaminación. Entonces se pone a consideración un Modelo de Calidad de Agua en el que se...
Tipo: Journal Contribution Palavras-chave: Waste water; Industrial wastes; Environmental impact; Freshwater pollution; River water; Water analysis; Waste water; Environmental impact; Industrial wastes; Water analysis; Http://aims.fao.org/aos/agrovoc/c_24927; Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_11763; Http://aims.fao.org/aos/agrovoc/c_16064.
Ano: 1998 URL: http://hdl.handle.net/1834/2314
Imagem não selecionada

Imprime registro no formato completo
Estudios químicos y bacteriológicos del río Baradero (Argentina): calidad sanitaria del agua y aptitud de los peces para consumo humano OceanDocs
Costagliola, M.; Seigneur, G.N.; Jurquiza, V..
As a result of an agreement signed by the Municipal Government of Baradero Buenos Aires Province, Argentina and the INIDEP, the sanitary quality of the Baradero River waters was studied and fish safety assessed. Results of five field surveys carried out between 1993 and 1997 are studied. Organochlorine and organophosphorate pesticide residues, as well as traces of heavy metals were analyzed in 49 fish specimens and aerobic heterotrophic bacteria (AHB), total coliform bacteria (TC) and fecal coliform bacteria (FC) were counted out in 7 sampling stations placed on the coast and the riverbed. Alpha Hexachlorohexane, gamma Hexachlorohexane, beta Hexachlorohexane, Aldrin, Heptachlor epoxide, pp'DDE and Dieldrin were detected in fish tissues. The values of AHB...
Tipo: Journal Contribution Palavras-chave: Freshwater pollution; Pollution surveys; Chemical analysis; Water analysis; Microbiological analysis; Pesticides; Public health; Pathogenic bacteria; Pesticides; Public health; Water analysis; Microbiological analysis; Pathogenic bacteria; Http://aims.fao.org/aos/agrovoc/c_5739; Http://aims.fao.org/aos/agrovoc/c_6349; Http://aims.fao.org/aos/agrovoc/c_16064; Http://aims.fao.org/aos/agrovoc/c_25302; Http://aims.fao.org/aos/agrovoc/c_34317.
Ano: 2003 URL: http://hdl.handle.net/1834/2417
Imagem não selecionada

Imprime registro no formato completo
Evaluación del impacto ambiental sobre las comunidades de protozoos en la desembocadura del Rio Almendares, Ciudad de la Habana, Cuba. OceanDocs
Revilla Alcázar, I.; Prieto Trueba, D..
One of the practical utilities of the protozoa resides in their employment as biological indicators of the degree of environmental contamination. In this work a characterization of the protozoa community is made in the outlet of the river Almendares, which constitutes the most important fluvial current in the Cuban archipelago from the historical point of view, for they were selected it five stations that they were randomized monthly for a two year-old period (1996-1998). Of the 100 identified species 34 constitute new registrations for this segment of the river. The biggest specific richness corresponded to the ciliates, representing 67% of the total of species. The smallest specific richness corresponded to the estuary, where species are included...
Tipo: Conference Material Palavras-chave: Indicator species; Freshwater pollution; Population density; Estuaries; Estuaries; Indicator species; Population density; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_35790; Http://aims.fao.org/aos/agrovoc/c_6112.
Ano: 2006 URL: http://hdl.handle.net/1834/2253
Imagem não selecionada

Imprime registro no formato completo
Land Based Activities and Sources of Pollution to the Marine, Coastal and Associated Fresh Water Ecosystems in the Western Indian Ocean Region OceanDocs
Francis, J.; Mmochi, A.J..
The lack of infrastructure and treatment facilities for the large quantities of domestic sewage generated by expanding coastal urban populations, and an increasing number of visiting tourists, represents the greatest threat to public health, coastal habitats and economic development in each state of the region. Other priorities requiring action include the effects of siltation related to agricultural activity and the dumping of solid domestic waste in the coastal areas leading to the degradation of coastal habitats, with implications for fish stocks and catches. Furthermore, laws and policies regardinng waste disposal and quality of effluents need to be enacted and reinforced Although eutrophication and algal blooms associated with agricultural, industrial...
Tipo: Preprint Palavras-chave: Marine pollution; Freshwater pollution; Sewage; Freshwater environment; Coastal environment.
Ano: 2003 URL: http://hdl.handle.net/1834/209
Imagem não selecionada

Imprime registro no formato completo
Preliminary assessment of the cocial, economic and environmental impacts of Water Hyacinth in Lake Victoria basin and status of control OceanDocs
Mailu, A.M..
The paper presents preliminary data collected in an assessment of the social, economic and environmental impacts of water hyacinth in the Lake Victoria Basin. A summary of the status of control and strategies for the future is given. The report draws on field observations made, studies through interviews of affected communities and organisations, personal communications and published reports by scientists in the region. Lake Victoria, the world’s second largest freshwater body, supports an estimated 25 million people living in the Basin, with an estimated gross economic product of US$3–4 billion annually, mainly from subsistence agriculture and fishing in Kenya, Uganda, Tanzania, and parts of Rwanda and Burundi. The multiple activities in the Lake Victoria...
Tipo: Proceedings Paper Palavras-chave: Environmental conditions; Environmental factors; Environmental impact; Environmental protection; Freshwater pollution; Resource management; Environmental factors; Environmental impact; Environmental conditions; Environmental protection; Resource management; Http://aims.fao.org/aos/agrovoc/c_2594; Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_15898; Http://aims.fao.org/aos/agrovoc/c_6524.
Ano: 2001 URL: http://hdl.handle.net/1834/1292
Imagem não selecionada

Imprime registro no formato completo
Studies on the water quality of River Ramisi near a sugar factory OceanDocs
Oteko, D..
The findings are presented of a study conducted to investigate the quality of the water at the Ramisi Estuary, which is affected by effluents from a sugar factory. The river was found to be polluted all year round by these wastes and the need for proper treatment of the waste before discharging is stressed.
Tipo: Journal Contribution Palavras-chave: Industrial wastes; Brackishwater pollution; Freshwater pollution; Pollution monitoring; Wastes; Absorption; Wastes.
Ano: 1986 URL: http://hdl.handle.net/1834/1210
Imagem não selecionada

Imprime registro no formato completo
Studies on the water quality of River Ramisi near a sugar factory OceanDocs
Oteko, D..
The findings are presented of a study conducted to investigate the quality of the water at the Ramisi Estuary, which is affected by effluents from a sugar factory. The river was found to be polluted all year round by these wastes and the need for proper treatment of the waste before discharging is stressed.
Tipo: Journal Contribution Palavras-chave: Industrial wastes; Brackishwater pollution; Freshwater pollution; Pollution monitoring; Wastes; Absorption; Wastes.
Ano: 1986 URL: http://hdl.handle.net/1834/1210
Imagem não selecionada

Imprime registro no formato completo
The need for aquatic pollution studies in Kenyan inland waters OceanDocs
Onyari, J.M..
The need for baseline data on pollution studies to the aquatic biota of Kenyan Inland waters is of profound importance. Aware of the possible contamination of the rivers and Lakes with heavy metals, pesticides and other pollutants used around them for the control of tropical diseases and treatment of agricultural crops, a monitoring programme is necessary.
Tipo: Journal Contribution Palavras-chave: Freshwater pollution; Pollution control; Pollution effects; Pollution control; Http://aims.fao.org/aos/agrovoc/c_6078.
Ano: 1986 URL: http://hdl.handle.net/1834/1257
Imagem não selecionada

Imprime registro no formato completo
Water quality trends and input loads to Lake Nakuru OceanDocs
Kulecho, Andrew; Muhandiki, Victor.
Water quality trends of Lake Nakuru, Kenya and its feeder streams were monitored in 2001-2004. Water samples were obtained from eleven stations in the lake and five points on inflowing streams. The items monitored were physico-chemical and biological components. The drainage basin was characterized by recurrence of dry spells throughout the period with water losses in the lake exceeding the amount received to cause a fall in water volume. The lake water salts content rose – conductivity and alkalinity reached 58 ms/cm and 5,200 mg/l respectively. PH was more or less constant (10.00 – 10.36). Daytime oxygen concentration in the mid-lake system rose (to greater than 20 mg/l) while remaining low in the inflow portions of the lake. On one occasion, the lake...
Tipo: Proceedings Paper Palavras-chave: Water quality; Biomass; Mortality causes; Anthropogenic factors; Phytoplankton; Pollution effects; Degradation; Man-induced effects; Inland waters; Freshwater pollution; Physicochemical properties; Inflow; Environmental monitoring; Land use; Urbanization; Environmental impact; Pollution; Freshwater.
Ano: 2006 URL: http://hdl.handle.net/1834/5312
Registros recuperados: 12
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional