胶州湾双壳类壳体中重金属元素的累积

Accumulation of heavy metals in bivalves shells of Jiaozhou Bay

从胶州湾沿岸的7个取样点采集黄渤海近海常见的菲律宾蛤仔(Ruditapes philippinarum)、褶牡蛎(Oystrea densela-mellosa)和紫贻贝(Mytilus galloprovincialis)三种双壳类软体动物,利用电感耦合等离子体质谱法(ICP-MS)对壳体中的重金属元素进行了测定以及数理统计,结果表明:双壳类壳体中Cr、Cu、Zn、Hg、Pb和Cd的平均含量分别为(269.33,1115.37,4845.81,6.89,19.47和366.06)×19-9,含量顺序Zn>Cu>Cd>Cr>Pb>Hg,与水体中的重金属含量顺序基本一致;三类双壳类壳体中重金属含量存在明显的种间差异性,多数重金属在菲律宾蛤仔壳体中含量高,而在褶牡蛎、紫贻贝壳体中含量较低;三类双壳类壳体对重金属具有相似的富集趋势,对Zn和Cu累积明显,富集系数达102数量级,其次为Pb,富集系数介于10~20之间,Cd的富集系数最低,小于10。

Three popular species of bivalves including clam(ruditapes philippinarum),oyster(oystrea denselamellosa) and mussel(mytilus galloprovincialis) in Yellow Sea were sampled at seven sites in Jiaozhou Bay.The main heavy metals contents of Cr,Cu,Zn,Hg,Pb and Cd in the shells were measured by ICP-MS method,and the average contents are(269.33,1115.37,4845.81,6.89,19.47 and 366.06)×19-9,respectively.The trend of these metals contents in bivalve shell is Zn>Cu>Cd>Cr>Pb>Hg,which coincides with the heav...