SPECIATION OF COPPER, ZINC IN COLUMNED SEDIMENT OF CAU RIVER BASIN – THAI NGUYEN PROVINCE

Abstract

    A five-step sequential extraction procedure was applied for the determination of thedistribution of two elements (Cu, Zn) in the columns of sediment samples collected at Cauriver, located in Thai Nguyen. The accuracy is evaluated by comparing total trace metalconcentrations to the sum of the five individual fractions as well as standard materialreference (MESS-3) proved to be satisfactory.Based on the results determined at five column sediment in the different places of Cau river,the distribution of fractions of Zn, Cu does not change much among different places of Cauriver in this monitoring location, they are mainly associated with oxidizing and residualfractions. The total content of two metals had reduced corresponding to the depth of thecolumn sediment.