DETERMINING THE  METALS CONCENTRATION  IN THE SOIL OF ZLATNA AREA BY ICP SPECTROSCOPY

Suciu Ioan, Constantin Cosma, Mihai Todica

	Babeş Bolyai University, Faculty of Physics, M. Kogâlnicaenu no.1 400084 
            Cluj-Napoca ,Romania, siiioan@yahoo.com

       In Zlatna area located in Western Carpathian region, around an industrial complex involved in mining, metallurgical and chemical activities, the soil is polluted with heavy metals. The primary and secondary metallic sulphides are concentrated by floating technology and metals are extracted by smelting procedures.  At the same time, in town there is also a chemical enterprise preparing different mineral salts.
     The soil is  loaded with: Pb, Cu, Zn and Cd at levels exceeding the maximum allowable limits. The samples have been taken from locations where there are not ground sliding and the probability of alluvial deposits is very reduced. The concentration of heavy metals was measured by ICP. In some locations the concentration of these metals exceeds the admitted concentration even 40 times.	       	
        Determining  the concentration of several elements, at different depths in the soil, can lead to an image of the historical pollution in the studied area, the  provided measures are taken with a view to observing the choice of locations. Unlike these measurements, the measurement of concentration in the air or in the running waters provides data on the  situation existing at a certain moment or in a brief period of time.  The method of direct study of element concentration in soil eliminates the necessity of a reference batch and the corrections are not necessary.

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Key words: pollution, heavy metals, Zlatna