Black Sea is unique as the largest natural anoxic water basin in the world, with a shift in sulfur chemistry because of high level of hydrogen sulphide, which very probably affects the speciation and uptake of some toxic elements. The Black Sea receives river inputs from a large catchment territory with diverse land uses and high degree of euthrophication. It might be assumed that the heavy metals could contribute to important pollution, thus affecting the ecological situation and public health. On the other hand, there is a lack of information on the chemical speciation of different pollutants, their transfer, bioaccumulation and effects.
The main objectives of this project are therefore: development and validation of combined and hyphenated highly selective procedures, improving qualifications of personnel of regional laboratories and common application of developed procedures for survey of sea water, with an emphasis on three priority pollutants: arsenic, cadmium and lead. New information on the contents of ecologically relevant species of chemical elements at Bulgarian Black Sea Coast , including seasonal variation, relation to sea currents and bioaccumulation in biota from different representative levels of the trophic chain will be obtained. The bioassays are expected to provide new information on the extent of deleterious effects of the pollutants of interest. Advanced statistical treatment of data by modern chemometric approaches will result in a representative picture of marine pollution and its better control with a view to development of tourism and better utilization of marine resources.