Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Long-term persistence of sedimentary copper contamination in Lake Orta: Potential environmental risks 20 years after liming |
| Abstract | Lake Orta, northern Italy, has suffered from severe copper pollution and human-induced acidification between the 1920s and the 1990s because of discharges from a rayon factory and electroplating industries located in its water basin. Following liming operations in the late 1990s, the chemical quality of the water column has been restored and signs of, still ongoing, biological recovery observed. Examination of two sediment cores collected close to the main historical Cu discharge and in the central part of the Lake shows that Cu concentrations in the uppermost layers of bottom sediments remain 10 to 40-fold higher than background levels. Past studies demonstrated the toxic potential of Lake Orta sediments to a variety of organisms at Cu concentrations comparable to present ones. Comparison with published results suggests that current level of Cu contamination may still pose a risk to sediment-ingesting organisms and slow down further ecological recovery of Lake Orta. Particular attention should be given to understand the effects of dietary ingestion of Cu from sediments which, unlike in previous ecotoxicological studies, may now represent the main route of Cu exposure for sediment-ingesting benthic organisms. |
| Source | Journal of limnology (Testo stamp.) 75 (2S), pp. 107–119 |
| Keywords | Copper contaminationFossil diatomsLake OrtaLegacy pollutionPaleoecotoxicology |
| Journal | Journal of limnology (Testo stamp.) |
| Editor | Istituto per lo Studio degli Ecosistemi., Verbania Pallanza, Italia |
| Year | 2016 |
| Type | Articolo in rivista |
| DOI | 10.4081/jlimnol.2016.1232 |
| Authors | Vignati, Davide A L; Bettinetti, Roberta; Marchetto, Aldo |
| Text | 357892 2016 10.4081/jlimnol.2016.1232 Scopus 2 s2.0 84964854761 Copper contamination Fossil diatoms Lake Orta Legacy pollution Paleoecotoxicology Long term persistence of sedimentary copper contamination in Lake Orta Potential environmental risks 20 years after liming Vignati, Davide A L; Bettinetti, Roberta; Marchetto, Aldo Consiglio Nazionale delle Ricerche; Universita degli Studi dell Insubria; Consiglio Nazionale delle Ricerche; Universite de Lorrain Lake Orta, northern Italy, has suffered from severe copper pollution and human induced acidification between the 1920s and the 1990s because of discharges from a rayon factory and electroplating industries located in its water basin. Following liming operations in the late 1990s, the chemical quality of the water column has been restored and signs of, still ongoing, biological recovery observed. Examination of two sediment cores collected close to the main historical Cu discharge and in the central part of the Lake shows that Cu concentrations in the uppermost layers of bottom sediments remain 10 to 40 fold higher than background levels. Past studies demonstrated the toxic potential of Lake Orta sediments to a variety of organisms at Cu concentrations comparable to present ones. Comparison with published results suggests that current level of Cu contamination may still pose a risk to sediment ingesting organisms and slow down further ecological recovery of Lake Orta. Particular attention should be given to understand the effects of dietary ingestion of Cu from sediments which, unlike in previous ecotoxicological studies, may now represent the main route of Cu exposure for sediment ingesting benthic organisms. 75 Published version http //www.scopus.com/record/display.url eid=2 s2.0 84964854761 origin=inward articolo jol2016.pdf materiale supplementare JoL2016supp.pdf Articolo in rivista Istituto per lo Studio degli Ecosistemi. 1129 5767 Journal of limnology Testo stamp. Journal of limnology Testo stamp. J. limnol. Testo stamp. Journal of limnology. Testo stamp. aldo.marchetto MARCHETTO ALDO TA.P02.014.002 Impatto dei cambiamenti globali sugli ecosistemi acquatici |