Distribution of Dissolved Copper Species in Nakdong River Water

Abstract

The fractional composition of dissolved copper in the Nakdong River, Korea was investigated. The dissolved copper was classified into "labile", "bound" and "inert" fractions. The total dissolved copper concentration increased gradually toward the lower reach of the river. In general, the inert fraction was most abundant, followed by the bound fraction. The labile fraction was a minor part of the total dissolved copper. The high ratio of labile fraction in the upper part of the Nakdong River water may be caused by high levels of ionic substances and low levels of dissolved organic carbon. A close relation was observed between the labile fraction and the dissolved organic carbon concentration in the upper reach of the river.