The determination of heavy metals in the ligurian sea. I, the distribution of Cu, Co, Ni and Cd in surface waters |
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| Authors: | R Frache F Baffi A Dadone G Zanicchi |
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| Institution: | Institute of General and Inorganic Chemistry, University of Genoa, Genoa Italy |
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| Abstract: | Determinations of Cu, Co, Ni and Cd were carried out on 39 samples of surface seawaters from the Ligurian Sea, nearshore and offshore, between the Isola Capraia and Imperia. The concentrations of trace elements have been established employing the analytical method suggested by Le Meur and Courtot-Coupez (1973), by means of concentration of the sample by chelating resin, solvent extraction of the eluate and then by quantitative determination by AAS. The results obtained with this technique probably refer to ionic forms of the elements only. The Co concentration was lower than 0.15 μg 1−1 in 32 samples, with an average of 0.49 μg 1−1 for the others. For Cd, the greater number of samples had a content lower than 0.05 μg 1−1. For the others the mean concentration was 0.13 μg 1−1. The Ni had a mean concentration of 0.93 μg 1−1 and the average Cu content was 1.43 μg 1−1. Our data are in agreement with the values published by authors who have employed the same analytical technique. We observed that the offshore samples present a concentration lower than that in the nearshore samples. |
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