Heavy metal content and lithological properties of recent sediments in the Northern Adriatic |
| |
Authors: | R Donazzolo O Hieke Merlin L Menegazzo Vitturi B Pavoni |
| |
Institution: | Dipartimento di Scienze Ambientali, Facoltà di Chimica Industriale, Dorsoduro, 2137, 30123 Venezia, Italy |
| |
Abstract: | Heavy metal (Hg, Pb, Cd, Cu, Cr, Ni, Co, Zn and Fe) concentrations, textural characters and mineralogical compositions have been determined on 246 surface sediment samples from the Northern Adriatic Italian sea area. The relationship between the heavy metals content and the pelite (< 63 μm fraction) percentage has been studied. All the metals resulted accumulated in the fine fraction with the following percentages (Hg, 95%; Zn, 86%; Pb, 82%; Cu, 79%; Cd, 74%; Ni, 70%; Cr, 65%; Co, 65% and Fe, 64%). The specific surface area has been measured on 44 samples and correlated to metal values. A fairly good (50% and more variation explained) linear correlation co-efficient has been found for Ni and Cu in the entire area, less significant correlation for other metals. In order to discriminate between natural and anthropogenic origin the metal concentrations on the whole sediment has been normalized on the basis of the pelite percentage. In the areal distributions drawn with the corrected values, zones contaminated by industrial discharges have been identified mainly in front of the lagoon of Venice. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|