ASPECTOS GEOQUÍMICOS Y AMBIENTALES DE LOS SEDIMENTOS DEL RÍO CUCHIVERO, VENEZUELA

This paper reports the geochemical characteristics and environmental conditions of Cuchivero river sediments in Venezuela, depending on particle size, organic matter, organic carbon, nitrogen and total phosphorus, carbonates and heavy metals. The granulometry was typified by a predominance of sands with low organic matter (0.52 to 0.87%), organic carbon (0.06 to 0.09%) and carbonates content (0.54 to 2.61%) as well as high values of total nitrogen (602-985 mg / kg). The poor correlation between nitrogen, phosphorus and organic matter, it suggests present of nitrogen and total phosphorus of allochthonous origin and no Redfield organic matter. The average heavy metals in mg/kg, showed a concentration gradient descent, Fe (410)> Mn (63.14)> Zn (9.01)> Ni (3.38)> (2.21Cu)> Cr (2.09)> Co (1.13)> Cd (0.21) > Pb (0.07) mg / kg, with an association to the sands and carbonates, suggesting lithogenic origin. From the environmental point of view, no evidence of anthropogenic impact, as reflected by levels of organic matter and heavy metals are below the permissible values.Bol. Inst. Oceanogr. Venezuela, 55 (1): 41-53 (2016) http://www.slideshare.net/WilliamSenior/aspectos-geoqumicos-y-ambientales-de-los-sedimentos-del-ro-cuchivero-venezuel