Distribution of Mercury and Other Heavy Metals in Core Sediments of the Northern Adriatic Sea |
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| Authors: | Fabbri Daniele Gabbianelli Giovanni Locatelli Clinio Lubrano Debora Trombini Claudio Vassura Ivano |
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| Institution: | 1. Laboratorio di Chimica Ambientale, Scienze Ambientali, Universitá di Bologna, via Marconi 2, Ravenna, Italy
2. Laboratorio di Oceanografia, Scienze Ambientali, Universitá di Bologna, P.za Kennedy, Ravenna, Italy
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| Abstract: | Seven sediment cores were collected along a transect about20 km off from the mouth of the Po River, in the northernAdriatic Sea (Italy). Cores were characterised by differentdepositional sequences associated with late Pleistocene-Holocene lowstand (LST), transgressive (TST) and highstand (HST) system tracts. Sediment samples were analysed for mercury, copper, nickel, chromium, manganese and iron, aswell as for total organic matter. Metal distributiongenerally showed vertical and spatial variability ascribed tograin size effects with no significant anthropogenicperturbation. Conversely, mercury showed vertical profilescharacterised by surface enrichment, with concentrations inthe upper layer (50–230 ng g-1) exceeding 3–11 times the background value of 20 ng g-1 determined in bottomcores. Surface maxima were attributed to anthropogenic mercurydelivered mainly by the Po River. |
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