Spatial and Temporal Heavy Metal Concentration (Cu,Pb, Zn,Hg, Fe,Mn, Hg) in Sediments of the Mar Piccolo in Taranto (Ionian Sea,Italy) |
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Authors: | Petronio Bianca Maria Cardellicchio Nicola Calace Nicoletta Pietroletti Marco Pietrantonio Massimiliana Caliandro Lucia |
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Affiliation: | (1) Department of Chemistry, University “La Sapienza”, p.le A Moro 5, 00185 Rome, Italy;(2) CNR-Institute for Coastal Marine Environment, Taranto Section, via Roma 3, 74100 Taranto, Italy;(3) National Institute for Protection and Research of the Environment (ISPRA), via Curtatone 3, 00100 Rome, Italy;(4) Laboratory of Chemometrics and Environmental Applications, (ISPRA), via di Casalotti 300, 00166 Rome, Italy;(5) ENEA, Rome, Italy |
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Abstract: | The Mar Piccolo (surface area of 20.72 km2) is located in the Northern area of the Taranto town (Ionian Sea, Italy). It is an inner, semi-enclosed basin with lagoon features connected with the Mar Grande through two channels which are very important for water exchange. Mar Piccolo basin is subjected to urbanization, industry, agriculture, aquaculture and commercial fishing. Hence, it is important to have a temporal picture both of heavy metal content and of organic carbon and their distribution (hydrophobic fraction, hydrophilic fraction, humic compounds) to check the progress of pollution in time. Three sediment cores collected on the basis of the pollution sources have been analyzed. Both heavy metal and organic carbon concentrations underline the fact that the anthropogenic input is different in the three sites, and that in time the amount of pollutants coming into the Mar Piccolo have changed in different ways. The high amount of organic hydrophilic compounds present in sediments, both due to the small water depth and to the high accumulation rate, make the sediment site high in oxygen consumption due to a considerable chemical and biochemical transformations of organic matter. |
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