CADMIUM AND MANGANESE IN SURFACE MICROLAYER AND IN SUBSURFACE WATER OF ESUTARINE LAKE GARDNO

In order to investigate the effect of salinity level on the concentration of cadmium and manganese in the surface microlayer, several samples were collected from an estuarine lake Gardno in a quarterly cycle over the period of four years. Three testing stations were established in locations typical of this lake. In the lake, one can distinguish three areas with various levels of salinity, with a sampling site for each of these areas. The volume of water taken as samples varied, depending on the techniques used. During the experiment, surface microlayer samples of ca 0.1 and 0.25 mm were obtained. The subsurface water was obtained at the depth of 15 cm. The collected samples were analysed with an atomic spectrometer in order to determine the concentration of cadmium and manganese.