Author(s)

R. Garcia, M. Rionda & E. Maranoif

Abstract

In this work the concentrations of the metals Cr, Fe, Ni, Cu, Zn, Cd and Pb in sediments of the Rivers Avil6s and Abono in Asturias were studied. Samples were taken at four points of said rivers from December 1992 to February 1993. These rivers were chosen because they flow trough highly industrialized zones and the most densely populated area of Asturias. Sediments were digested with acids in closed reactors in a microwave oven. The results show significant levels of pollution in some areas due to the disposal of untreated industrial effluents, the mud fraction of the sediments having the highest concentration values. 1 Introduction The continuous disposal of untreated industrial and urbane effluents into rivers is the cause of important accumulations in river beds of

Keywords