椒江口海域重金属含量分布及在沉积物和生物体中的富集

Distribution of heavy metals and enrichment of it in sediment and organisms in Jiaojiang Estury

研究了椒江口海水、沉积物和生物体中7种重金属的浓度水平,评价了各种重金属在沉积物和生物体内的富集情况。结果表明,表层海水中重金属Cr、Cu、Pb、Cd、Zn、As和Hg的平均浓度分别为0.57、7.37、1.89、0.18、36.99、1.57、0.018μg.L-1;表层沉积物中重金属Cr、Cu、Pb、Cd、Zn、As和Hg的浓度分别为30.11、30.62、32.61、0.106、68.56、2.48、0.027×10-6;生物体内除了鲻鱼中未检出Zn外,七种重金属在缢蛏、鲻鱼体内均有检出,且缢蛏中重金属含量明显高于鲻鱼体内重金属的含量。Cr、Cu、Pb、Zn、As在沉积物中富集系数高于生物体内,Cr、Zn、Hg、Pb在鲻鱼中的富集系数大于缢蛏中。

The concentrations of heavy metals in seawater, sediment and organisms are determined in Jiao jiang Estury. The enrich- ment of heavy metals in sediment and in organisms is analyzed. The results are as following： The concentrations of Cr, Cu, Pb, Cd, Zn, As and Hg were 0. 57,7. 37 ,1. 89,0.18 ,36. 99,1. 57,0. 018μg · L^-1 in the seawater, respectively. They are 30. 11,30.62, 32.61,0. 106,68.56,2, 48,0. 027 × 10^-6 in the sediment（ dry weight）, respectively. Except Zn, other heavy metals are determined in the organisms. The concentrations of heavy metals are more in razor clam than in the mullet. The Kocof Cr, Cu, Pb, Zn, As are more in the sediment than in the organisms. The Koc of Cd, Zn, Hg are more in the mullet than in razor clam.