Resumen

HERNANDEZ PENALVER, María Teresa; GARCIA MELIAN, Maricel; CANAS PEREZ, Regla  y  SARDINAS PENA, Olivia. Fracciones biodisponibles de arsénico, plomo, cadmio y mercurio en sedimentos de corrientes superficiales seleccionadas. Rev Cubana Hig Epidemiol [online]. 1999, vol.37, n.3, pp. 132-135. ISSN 1561-3003.

The bioavailable fractions of arsenic, cadmium, lead, and mercury in the sediments of 20 selected rivers that supply water to more than 5 000 inhabitants in Cuba were determined. The extraction was made in the fraction composed of particles under 63 mm with hydrochloric acid 0.5 mol/L. In the cases of arsenic and cadmium all the samples presented levels below the limits of quantification of the test methods. The medians of the concentrations of lead and mercury in all rivers were lower than 15 and 0-15 mg/g, respectively. The total concentration of metal/concentration of bioavailable metal ratio was calculated when quantifiable concentrations of bioavailable lead and mercury were found.

Palabras clave : ARSENIC [analysis]; LEAD [analysis]; CADMIUM [analysis]; MERCURY [analysis]; GEOLOGICAL SEDIMENTS [analysis]; WATER SUPPLY; RIVERS.

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