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Type: Adobe PDF Tag: venezuela. User: William Senior
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Blob Comportamiento de los metales trazas Cu, Pb, Mn y Zn...

Created: 2018-07-29 15:33:21

Credits: User William Senior

License: Creative Commons Attribution-Share Alike 3.0 Unported License

The concentrations of the metalsCu, Pb, Mn and Zn in fra ctions geochemistry insix sediment core of the lagoon Unare, Venezuela.A procedure of sequential extraction of metalswas determined, for each fraction was usedreagents different and conditions of digestionand the concentrations of metals determinedwith spectrophotometer of Atomic Absorption.The fractionating of metals indicated an order ofdecreasing concentration as it follows: residualfraction > organic/sulfur matter > carbonates...

File type: Adobe PDF

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Blob Influencia del rio Manzanares en la biodisponibilida...

Created: 2018-07-29 01:32:16

Credits: User William Senior

License: Creative Commons Attribution-Share Alike 3.0 Unported License

Se estudian los niveles de metales pesados, Cr, Pb y Zn en la fracción biodisponible en sedimentos superficiales de la región marino-costera de la ciudad de Cumaná, Venezuela, durante los periodos de sequía y lluvia, en 17 estaciones de muestreo distribuidas a lo largo de la costa. Se encontró que hubo una diferencia entre los periodos de muestreo para el ciclo y el plomo, los cuales registraron grados máximos durante la temporada de lluvia. Para el r...

File type: Adobe PDF

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