PCDD/F and dioxin-like PCB bioaccumulation by Manila clam from polluted areas of Venice lagoon (Italy).
POP bioaccumulation pathways in the clam Tapes philippinarum were examined for two years from juveniles to adult size. Two polluted sites, one with sandy sediment, the other muddy were compared with a reference site characterized by low contamination levels. Juvenile clams coming from a hatchery were reared both on the sediment and in nets suspended at 30 cm from the bottom. POP changes in clam tissue were related to the concentrations recorded in sediments and in the particulate matter during the entire fattening period. Results provided interesting data on the relationships between environmental contamination and bioaccumulation. Contrary to studies on the decontamination times of the clams collected in polluted areas, this work investigates the preferential clam bioaccumulation pathways during growth under different environmental conditions. In general POP bioaccumulation resulted to be correlated to concentrations in SPM rather than in sediments and was higher in S-clams rather than in B-clams.
Department of Environmental Sciences, Informatics & Statistics, University Ca' Foscari of Venice, Calle Larga, Santa Marta, 2137, 30123 Venice, Italy. Electronic address: sfrisoad@unive.it.
Adriano
A
Sfriso
Chiara
C
Facca
Stefano
S
Raccanelli
D000818:Animals; D001572:Benzofurans / Q000378:metabolism*; D049872:Bivalvia / Q000378:metabolism*; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins / Q000378:metabolism; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry; D006801:Humans; D007558:Italy; D011078:Polychlorinated Biphenyls / Q000378:metabolism*; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000378:metabolism*
D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004147:Dioxins; D000072317:Polychlorinated Dibenzodioxins; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls
Bioaccumulation pathway; DLPCBs; PCDD/Fs; Tapes philippinarum; Venice lagoon