Assessment of Hg, Cd, Pb and Cr accumulations in razor clam (Solen marginatus) from the Homa Lagoon

In this study; the accumulation of Hg, Cd, Pb, and Cr were investigated seasonally in razor clams (Solen marginatus) from the Homa Lagoon. The highest heavy metal concentrations were found in summer which is spawning period. When detected Hg, Cd and Pb levels were compared with provisional tolerable weekly intake (PTWI), Turkish Food Codex and European Regulations values, no potential health risk was found. However, heavy metal pollution in razor clam from the Homa Lagoon should be monitored due to excessive Cr concentrations in respect to PTWI value

Assessment of trace metal concentrations and human health risk in clam (Tapes decussatus) and mussel (Mytilus galloprovincialis) from the Homa Lagoon (Eastern Aegean Sea)

Seasonal variations of tracemetal concentrations (Hg, Cd, Pb, Cr, Zn, and Cu) were investigated in the hepatopancreas and soft tissues (remaining parts of bivalves such as gill, mantle, foot, and muscle) of Tapes decussatus and Mytilus galloprovincialis from theHomaLagoon. The highest metal concentrations were recorded frequently in February and July in M. galloprovincialis and T. decussatus, respectively. Tracemetal levels (exceptZn) in the hepatopancreaswere higher than those in soft tissue for both bivalves. The results showed that the mean concentrations of Hg, Cd, and Zn for M. galloprovincialis were higher compared to T. decussatus in both tissues. The metal concentrations in both bivalves from the Homa Lagoon were generally below the values of provisional tolerable weekly intake (PTWI) estimates, in terms of human health risk. According to hazardquotient(HQ), Crvalues forbothspeciesandCdvalues for only M. galloprovincialis were found greater than one. Also, total hazard index (THI) values were greater than one in both bivalves, having a potential risk for consumers