| Title | Twenty-year sediment contamination trends in some tributaries of Lake Maggiore (Northern Italy): relation with anthropogenic factors |
| Abstract | Lake tributaries collect contaminants from the watershed, which may accumulate in lake sediments over time and may be removed through the outlets. DDx, PCB, PAH, PBDE, and trace element (Hg, As, Cd, Ni, Cu, Pb) contamination was analyzed over 2001-2018 period in sediments of the 5 main tributaries and of the outlet of Lake Maggiore (Northern Italy). Sediment cores were collected in two points of the lake, covering 1995-2017 period. Concentrations were compared to Sediment Quality Guidelines (PECs), potential sources and drivers (land use, population numbers, industrial activities, hydrology) were analyzed, and temporal trends were calculated (Mann-Kendall test). PCB, PBDE, Pb, Cd, and Hg contamination derives mainly from heavy urbanization and industry. Cu and Pb show a temporal decreasing trend in the basin, likely as result of improved wastewater treatments and change in use. A recent PAH increase in the whole lake may derive from a single point source. A legacy DDx and Hg industrial pollution is still present, due to high persistence in sediments. Values of DDx, Hg, Pb, and Cu above the PECs in lake sediments and/or in the outlet show potential risk for aquatic organisms. Results highlight the key role of tributaries in driving contamination from the watershed to the lake through sediment transport. |
| Source | Environmental science and pollution research international 28 (28), pp. 38193–38208 |
| Keywords | Contamination trendLake MaggioreOrganic micropollutantsSedimentsTicino RiverTrace elements |
| Journal | Environmental science and pollution research international |
| Editor | Springer, Berlin, Germania |
| Year | 2021 |
| Type | Articolo in rivista |
| DOI | 10.1007/s11356-021-13388-6 |
| Authors | Marziali, Laura; Guzzella, Licia; Salerno, Franco; Marchetto, Aldo; Valsecchi, Lucia; Tasselli, Stefano; Roscioli, Claudio; Schiavon, Alfredo |
| Text | 458491 2021 10.1007/s11356 021 13388 6 Scopus 2 s2.0 85102936224 Contamination trend Lake Maggiore Organic micropollutants Sediments Ticino River Trace elements Twenty year sediment contamination trends in some tributaries of Lake Maggiore Northern Italy relation with anthropogenic factors Marziali, Laura; Guzzella, Licia; Salerno, Franco; Marchetto, Aldo; Valsecchi, Lucia; Tasselli, Stefano; Roscioli, Claudio; Schiavon, Alfredo Istituto di Ricerca sulle Acque, Italy; Leibniz Institute of Freshwater Ecology and Inland Fisheries; Universita degli Studi di Milano Bicocca; CNR Water Research Institute IRSA Lake tributaries collect contaminants from the watershed, which may accumulate in lake sediments over time and may be removed through the outlets. DDx, PCB, PAH, PBDE, and trace element Hg, As, Cd, Ni, Cu, Pb contamination was analyzed over 2001 2018 period in sediments of the 5 main tributaries and of the outlet of Lake Maggiore Northern Italy . Sediment cores were collected in two points of the lake, covering 1995 2017 period. Concentrations were compared to Sediment Quality Guidelines PECs , potential sources and drivers land use, population numbers, industrial activities, hydrology were analyzed, and temporal trends were calculated Mann Kendall test . PCB, PBDE, Pb, Cd, and Hg contamination derives mainly from heavy urbanization and industry. Cu and Pb show a temporal decreasing trend in the basin, likely as result of improved wastewater treatments and change in use. A recent PAH increase in the whole lake may derive from a single point source. A legacy DDx and Hg industrial pollution is still present, due to high persistence in sediments. Values of DDx, Hg, Pb, and Cu above the PECs in lake sediments and/or in the outlet show potential risk for aquatic organisms. Results highlight the key role of tributaries in driving contamination from the watershed to the lake through sediment transport. 28 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85102936224 origin=inward Twenty year sediment contamination trends in some tributaries of Lake Maggiore Northern Italy relation with anthropogenic factors articolo Marziali2021_Article_Twenty yearSedimentContaminati 1 .pdf Articolo in rivista Springer 0944 1344 Environmental science and pollution research international Environmental science and pollution research international Environ. sci. pollut. res. int. Environmental science and pollution research international. Environmental science and pollution research international Print Environmental science and pollution research Print ESPR Print lucia.valsecchi VALSECCHI LUCIA stefanotasselli TASSELLI STEFANO aldo.marchetto MARCHETTO ALDO liciamaria.guzzella GUZZELLA LICIA MARIA claudiogiovanni.roscioli ROSCIOLI CLAUDIO GIOVANNI franco.salerno SALERNO FRANCO laura.marziali MARZIALI LAURA |
