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Contributo in rivista
Tipo: Articolo in rivista
Titolo: Seasonal Distribution, Source Identification, and Toxicological Risk Assessment of Polycyclic Aromatic Hydrocarbons (PAHs) in Sediments from Wadi El Bey Watershed in Tunisia.
Anno di pubblicazione: 2017
Autori: Gdara, Imen; Zrafi, Ines; Balducci, Catia; Cecinato, Angelo; Ghrabi, Ahmed
Affiliazioni autori: Water Researches and Technologies Center Borj-Cedria Technopark, BP 273-8020, Soliman, Tunisia. firstname.lastname@example.org.
Abstract: Surface sediments were collected from the Watershed of Wadi El Bey in Tunisia to evaluate the degree of polycyclic aromatic hydrocarbons (PAHs) contamination. Sediments were collected during different seasons in 14 sites that received wastes from domestic effluent, industrial discharge, and agricultural drainage wastes. Twenty-six individual PAHs were analyzed. The total PAH contents (Sigma PAHs) in surface sediments showed wide variability, ranging from 6.89±0.05 to 340±0.1ngg-1. The 4-, 5-, and 6-ring compounds were the most abundant PAHs detected at the majority of sites. Diagnostic concentration ratios between pairs of PAHs and molecular indices, calculated with the purpose of drawing information about pollution sources, indicated that PAHs were of both petrogenic and pyrolytic origins. Toxic contaminants concentrations were determined according to the numerical effect-based sediment quality guidelines (SQGs). PAH levels did not exceed the SQGs, indicating that PAHs seem to pose low and occasional toxicity risks. Total carcinogenicity and mutagenicity (TEQBaP and MEQBaP) ranged from 0.08 to 65ng and from 0.02 to 135.0ngg-1 of dry weight, respectively. Among the seven carcinogenic PAHs, BaP accounted for the majority of the potency and could potentially be used as a unique indicator of PAH toxicity. This study provides a baseline to promote environmental protection programs and pollution monitoring/control in Watershed and coastal areas.
Lingua abstract: inglese
Pagine da: 488
Pagine a: 510
Pagine totali: 23
Archives of environmental contamination and toxicology
Numero volume: 73
Numero fascicolo: 3
Referee: Sì: Internazionale
Stato della pubblicazione: Published version
Indicizzato da: ISI Web of Science (WOS) 
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