Юг России: экология, развитие (Dec 2015)
POLLUTION OF SEA OF AZOV WITH HEAVY METALS
Abstract
Aim. The aim is to assess the condition of the Azov Sea water pollution by the following heavy metals - Pb, Cd, Cu, Zn, Hg.Materials and methods. We used the data provided by the State Organization "Azovmorinformcentr" for concentrations of heavy metals in the water for the period of 2010-2014 as well as published data during 1986 - 2009. Sampling and analysis was carried out in accordance with approved procedures.Results. Concentrations of Pb in the water of the sea in the period of 1986-2014 ranges from 0,4 to19,91 ug / l. The maximum value of Pb (19,91 ug / l) was observed in the Kerch Strait in 2011. The highest average concentration of Cd in the period of 1986-2014 was observed in the Kerch Strait and was 2.19 ug / l. In the sea and the Gulf of Taganrog the average concentration of the metal was 0.51 and 0.36 ug / l., respectively. In the period of 1986-2014 the concentration of Cu ranged from 0.7 to 23.6 ug / l., with an average content of 5.56 ug / l. In the past five years, MAC values (maximum allowable concentration) have been constantly increasing. The maximum concentration of Zn over the entire observation period was 80 ug / l., and was registered in the Taganrog Bay in autumn of 2010. The average value was 14.73 ug / l. The average value of Hg in the period of 1986-2010 is 0.26 ug / l. (MAC is 2,6). We have established the seasonal trends for each concentration of heavy metals.Main conclusions. For the recent years (2010-2014.) we observed an increase in the concentrations of heavy metals due to the growth of economic activity in the Southern region of Russia.
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