Trace elements in major marketed marine bivalves from six northern coastal cities of China: Concentrations and risk assessment for human health

Abstract

a b s t r a c tOne hundred and fifty nine samples of nine edible bivalve species (Argopecten irradians, Chlamys farreri, Crassostrea virginica, Lasaea nipponica, Meretrix meretrix, Mytilus edulis, Ruditapes philippinarum, Scapharca subcrenata and Sinonovacula constricta) were randomly collected from eight local seafood markets in six big cities (Dalian, Qingdao, Rizhao, Weifang, Weihai and Yantai) in the northern coastal areas of China for the investigation of trace element contamination. As, Cd, Cr, Cu, Hg, Pb and Zn were quantified. The risk of these trace elements to humans through bivalve consumption was then assessed. Results indicated that the concentrations of most of the studied trace element varied significantly with species: the average concentration of Cu in C. virginica was an order of magnitude higher than that in the remaining species; the average concentration of Zn was also highest in C. virginica; the average concentration of As, Cd and Pb was highest in R. philippinarum, C. farreri and A. irradians, respectively. Spatial differences in the concentrations of elements were generally less than those of interspecies, yet some elements such as Cr and Hg in the samples from different cities showed a significant difference in concentrations for some bivalve species. Trace element concentrations in edible tissues followed the order of Zn4Cu 4As 4Cd 4Cr4 Pb 4Hg generally. Statistical analysis (one-way ANOVA) indicated that different species examined showed different bioaccumulation of trace elements. There were significant correlations between the concentrations of some elements. The calculated hazard quotients indicated in general that there was no obvious health risk from the intake of trace elements through bivalve consumption. But care must be taken considering the increasing amount of seafood consumption.

Temporal and spatial distribution of semicarbazide in western Laizhou Bay

“…During the last decade, several studies have investigated metal contaminants in surface water, sediment, as well as aquatic organisms along the north coast of the Shandong Peninsula (Liang et al, 2004;Wang et al, 2005;Xu et al, 2013;Gao et al, 2014;Li and Gao, 2014). In the present study, chemical analysis of oyster tissues was performed to identify contaminant conditions, and several physiological parameters and biomarkers indicative of oxidative stress, neurotoxicity and genotoxicity were also investigated to assess the health status of selected organisms.…”

“…The north coast of the Shandong Peninsula, located along the southern Bohai Sea, is one of the most important economic zones and industrial clusters in Northeast China. Heavy metals distribution and contamination in the surface seawater and sediment (Xu et al, 2013;Gao et al, 2014) as well as bivalve species (Liang et al, 2004;Wang et al, 2005;Li and Gao, 2014) have been documented in this region. However, there is little information about biological effects-based monitoring of such metal contamination in this region.…”

Biochemical performance of native and introduced clam species living in sympatry: The role of elements accumulation and partitioning

“…Also, Mora et al (2004) found low concentrations of As in sediments from Gulf and Gulf of Oman and high concentration in bivalves (Pinctada radiata, Crassostrea virginica, Saccostrea cucullata, Mytilus edulis). According to Li and Gao (2014), R. philippinarum from northern coastal of China was one of the bivalve species that accumulated higher concentrations of As when compared with C. gigas and M. edulis.…”

An integrative biomarker approach to assess the environmental stress in the north coast of Shandong Peninsula using native oysters, Crassostrea gigas

“…The north coast of the Shandong Peninsula, located along the southern Bohai Sea, is one of the most important economic zones and industrial clusters in Northeast China. Heavy metals distribution and contamination in the surface seawater and sediment (Xu et al, 2013;Gao et al, 2014) as well as bivalve species (Liang et al, 2004;Wang et al, 2005;Li and Gao, 2014) have been documented in this region. However, there is little information about biological effects-based monitoring of such metal contamination in this region.…”