EMIN CADAR, RODICA SIRBU, BOGDAN STEFAN NEGREANU PIRJOL, ANA MARIA IONESCU, TICUTA NEGREANU PIRJOL HEAVY METALS BIOACCUMULATION CAPACITY ON MARINE ALGAE BIOMASS FROM ROMANIAN BLACK SEA COAST
Knowledge of environmental pollution with an impact on health is essential for a sustainable environment and useful for people. The coastal areas of the world’s seas and oceans are polluted with different pollutants from technological sources and from other sources of socio-human activities. The pollutants studied are heavy metals Cd, Cu, Zn and Pb. In the paper are presented researches regarding the heavy metal concentrations determined in samples from marine water, sediments and algal mass, harvested from six stations from different areas of the Romanian Black Sea in two different years 2017 and 2018. The analyses were performed in the Chemistry Laboratories of the Faculty of Pharmacy, Ovidius University in Constanta, by a spectrophotometric method using Atomic Absorption Spectrometer ContrAA-700, Analytic Jena AG. For marine water in 2018 the following concentrations were obtained: Zn > Pb > Cu > Cd and in 2017 the order was different: Zn > Cu > Pb > Cd. For sediments in 2017 the order of concentrations is Cu > Zn > Pb > Cd and in 2018 the highest values in the sediment are recorded by the next high values Cu > Pb > Zn > Cd. Constant climate change and increased eutrophication in recent years have led to a massive increase in marine biomass in the Black Sea. For seaweed samples there are accumulations in the order of Zn > Cu > Pb > Cd in both years. Bioaccumulation factors in water BCF water, were higher in algae for Zn and Cu. From the analysis of bioaccumulation factors, it can be noticed that seawater algae accumulate heavy metals from seawater and sediment (confirmed by BCF water > 1 or BCF sed. > 1). The accumulation of heavy metals in seaweed shows the existence of pollutants and marine pollution factors. Marine algae are the best biomarkers of pollution.