Abstract
Lake Baldegg was chosen to study the influence of a permanent anaerobic hypolimnion on the transport of copper and zinc. The evaluation of concentration variations in function of time and depth and the sedimentation rates lead to the conclusion that copper, in contrast to zinc, is sorbed additionally on newly formed iron particles at the Fe3+/Fe2+ interface and transported on the ‘iron wheel’. A flux scheme for the hypolimnic transport of copper is quantified in a one-dimensional diffusion model. By this the observed variations of concentration profiles can be explained.
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