William Senior

ESPECIACION DE METALES EN SEDIMENTOS DEL RÍO CUCHIVERO, VENEZUELA

Published in Corpoica Ciencia y Tecnología Agropecuaria

The total concentration and the chemical forms of heavy metals were determined in superficial sediments of the Cuchivero river, Venezuela, using sequential extraction and atomic absorption spectrophotometry with flame. Pollution indices were used to study the distribution, pollution and environmental risk in the sediments. Total values ranged f...

Niveles de metales pesados en sedimentos superficiales en tres zonas litorales de Venezuela

Published in INTERCIENCIA

To evaluate the water quality along the continental shores of Venezuela, where fishing communities exploit the clam Tivela mactroides, the concentration of heavy metals (Cu, Mn, Fe, Zn, Cd, Ni, Pb y Cr) was determined in superficial sediments, together with environmental factors (temperature, salinity, dissolved O2, pH, phytoplanctonic biomass, se...

Seasonal Distribution of Nutrients and Primary Productivity on the Eastern Continental Shelf of Venezuela as Influenced ...

Published in Journal of Geophysical Research Oceans

Nitrogenous nutrients, dissolved silicate, and salinity were measured in surface waters and shallow hydrocasts along similar cruise tracks during the spring (dry season) and fall (wet season) of 1988. Both cruises transected the eastern Caribbean, transited the Gulf of Paria, ran parallel to the Orinoco Delta and into the main channel of the Orinoc...

CONTENIDO DE METALES PESADOS EN ORGANISMOS ACUÍCOLAS EXPENDIDOS EN LOS MERCADOS DE LA CIUDAD DE MACHALA, PROVINCIA DE EL...

No cabe duda que en los últimos años, el medio ambiente marino se ha ido contaminando visiblemente, como resultado de las actividades del hombre. Grandes cantidades de sustancias, algunas nocivas, llegan al ecosistema acuático y parte de ellas proceden de residuos industriales, agrícolas o domésticos. Dentro de la variable lista de contaminantes, l...