The use of chemical and instrumental methods in the study of the forms of occurrence of sulfides in bottom sediments

On the example of estuary Mius River - mouth River, estuary, Taganrog Bay Azov Sea, a complex chemical and instrumental methods was applied, including those developed by authors. This made it possible to study physicochemical parameters, content total hydrogen sulphide, form occurrence sulfides, iron their behavior in bottom sediments early diagenesis. Bottom were formed at negative Eh values. Sulfides are mainly molecular sulfide acid-soluble sulfides. The varied within wide limits, reaching 3.2 mg/g wet weight, gross from 25.4 45.1 dry weight. A significant relationship found between sulfur iron. presence hydrotroilite identified typical smell sulfide, black color, oily sludge, lack magnetic properties visual its formations using electron microscopy. Under microscope, images coacervates (colloidal accumulations) round-ellipsoidal shape (lenticular), gray black, mercury-like, obtained preparation. It established for first time that exists natural environment as gel-like substance capable moving sediments. Upon collision, small coalesced into larger globules. important role mercury accumulator diagenesis is shown.