中国北方海域扇贝重金属含量的比较与质量评价

Heavy metal contents and quality evaluation of scallop in northern China seas

于2005年10～11月在大连湾、秦皇岛、莱州湾、烟台、威海、胶州湾、胶南7个海域,进行了海湾扇贝(Argopecten irradians)和栉孔扇贝(Chlamys farreri)As,Hg,Pb,Cu,Zn5种重金属含量的调查。重金属含量的测定采用原子吸收法进行。结果表明:(1)重金属含量存在着组织差异性,贝边的含量高于贝柱;(2)取自同一海域的栉孔扇贝重金属含量高于海湾扇贝;(3)5种重金属的平均含量排序为:Zn>Cu>As>Pb>Hg;(4)胶州湾栉孔扇贝Zn有超标现象,贝柱和贝边中的含量分别是限量标准的1.24倍和1.59倍;Hg,Pb,As和Cu均未超标。

Argopecten irradians and Chlamys farreri were collected in 7 mariculture areas in northem China seas, including Dalian Bay, Qinhuangdao, Laizhou Bay, Yantai, Weihai, Jiaozhou Bay and Jiaonan from Oct. to Nov., 2005. Contents of five kinds of heavy metals including As, Hg, Pb, Cu and Zn were investigated via atomic absorption spectrophotometry. The results indicated as follows： （1） The heavy metal contents in scallop leftover were usually higher than that in scallop adductor; （2） In the same area, the heavy metal contents in C. farreri were higher than that in A. irradians; （3） The average contents of five heavy metals can be arranged as： Zn〉Cu〉As〉Pb〉Hg; （4） In Jiaozhou Bay, the Zn contents in the adductor and leftover of C. farreri were 1.24 and 1.59 times that of legal limit, respectively, whereas in other areas, the levels of five heavy metals were below the legal limit.