Investigation of elements in sediments collected in the Lake Balaton, I. Determination of acid soluble metals of sediments

Sediment samples were collected in the Lake Balaton at 15 sampling points i n 3 seasons. Samples were digested in acidic solutions and elements were de termined by atomic absorption method. Based on the results it was found tha t higher concentrations of elements were generally found in the northern sh ore. Only Ni and Cr compounds were identified in higher amount than the Hun garian soil standards recommend, other elements were found in lower concent rations. The elemental composition of the sediments is not dangerous for th e living biota of the lake. No significant changes were observed, in this s hort monitoring period, in the elemental concentrations of samples collecte d in three seasons. Of course, the 5-month monitoring program is not enough for the total characterization of the sediment, longer periods are needed.