title: Relationship among parameters of lake polluted sediments evaluated by multivariate statistical analysis.
abstract: In the attempt to assess the relationship and interdependency among sediment toxic pollutants, in particular heavy metals, polycyclic aromatic hydrocarbons (PAH), and linear alkyl sulfonates (LAS) and some of the sediment typical components: inorganic carbon (IC), organic material (OM) and acid volatile sulphides (AVS), multivariate techniques of statistical analysis have been applied to a set of chemical data obtained by the analysis of the sediments of the Trasimeno Lake, a central Italy lake characterized by a large surface (128 km(2)) and a low mean depth (about 4.5 m). The results of principal component analysis (PCA) show interrelationships between: OM content and PAH, Pb, and Cu concentrations of the sediments, LAS and AVS, and AVS and IC. The effect of the different sampling periods on sediment composition and contamination level, and the clustering of the sampling sites as a consequence of pollutant load are also shown. The principal component bi-plot of the variables and samples indicates that PAH have the greatest influence on the separation of samples in the different sampling periods.
authors.affiliation: Dipartimento di Scienze Biochimiche e Biotecnologie Molecolari, Sezione di Scienze Igienistiche ed Ambientali, Università degli Studi di Perugia, Via del Giochetto, Perugia 06126, Italy.
authors.forename: A
authors.initials: A
authors.lastname: De Bartolomeo
authors.forename: L
authors.initials: L
authors.lastname: Poletti
authors.forename: G
authors.initials: G
authors.lastname: Sanchini
authors.forename: B
authors.initials: B
authors.lastname: Sebastiani
authors.forename: G
authors.initials: G
authors.lastname: Morozzi
mesh_terms: D000476:Alkanesulfonates / Q000032:analysis; D002244:Carbon / Q000032:analysis; D004785:Environmental Pollutants / Q000032:analysis*; D005618:Fresh Water / Q000032:analysis*; D019015:Geologic Sediments / Q000032:analysis*; D007558:Italy; D019216:Metals, Heavy / Q000032:analysis; D015999:Multivariate Analysis; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis; D025341:Principal Component Analysis; D013440:Sulfides / Q000032:analysis
chemical_list: D000476:Alkanesulfonates; D004785:Environmental Pollutants; D019216:Metals, Heavy; D011084:Polycyclic Aromatic Hydrocarbons; D013440:Sulfides; D002244:Carbon