Assessment at mid-Black Sea coast of Turkey for recovery valuable heavy metals from sediments

10th World Congress on Water Resources and Environment, Atina, Yunanistan, 5 - 09 Temmuz 2017, cilt.1, ss.1179-1183, (Tam Metin Bildiri)

Rapid industrialization and urbanization has led to the contamination of sediments with heavy metals and organic

contaminants and created a pervasive problem worldwide. Major sources of contamination include agricultural and

urban lands, industrial activities, spills, and accidents. Arsenic (As), cadmium (Cd), cobalt (Co), copper (Cu), mercury

(Hg), nickel (Ni), lead (Pb), and zinc (Zn) are often found in sediments and other areas affected by anthropogenic

activities. Sediments containing these contaminants act as secondary sources of contamination, posing significant

direct and indirect environmental risks through bioaccumulation in aquatic organisms and incorporation into aquatic

food webs that may lead to human exposure. Heavy metal accumulation, bioavailability, and toxicity to sedimentdwelling

organisms are largely influenced by the physicochemical conditions and geochemical properties of

sediments. Ongoing assessment at mid-Black Sea coast of sediment samples was digested using the 1 ml HCIO4 %

65, 6 ml HNO3 % 65, 1 ml H2O2 % 30 for metal analysis. Digested samples were analyzed at Perkin Elmer Optima

4300DV Inductively Coupled Plasma Optical Emission Spectrometer (ICP-OES). Samples were taken from the four

stations; S1, S2, S3, S4. The results show us that all metals have the highest value in the sample number S4. These

values found for Cr 7.65 mg/l, Cu 3.05 mg/l , Zn 6.40 mg/l, Cd 11 mg/l ,Pb 1.32 mg/l and Al 2120 mg/l . According

to these results, valuable heavy metals may also be treated and extracted from for recovery.