海口湾表层沉积物重金属分布特征

Distribution Characteristics of Heavy Metals Concentration in Surface Sediments of Haikou Bay

针对2018年10月海南省海口市20个站位表层沉积物中6种重金属Cu、 Pb、 Zn、 Cd、 Cr、 As的含量进行调查,探讨它们的分布特征,对重金属含量进行单因子指数评价。结果表明,该海域表层沉积物Cu的含量范围(2.68~47.06)×10^-6,平均值16.21×10^-6;Pb的含量范围(12.05~49.51)×10^-6,平均值28.36×10^-6;Zn的含量范围(18.33~236.05)×10^-6,平均值64.90×10^-6;Cd的含量范围(0.10~1.01)×10^-6,平均值0.29×10^-6;Cr的含量范围(14.23~84.37)×10^-6,平均值52.82×10^-6;As的含量范围(2.22~16.05)×10^-6,平均值10.38×10^-6,重金属含量以17、 18号站位为最高值。除了17号Cu、 Zn、 Cd、 Cr以及18号站位Cd,其他站位的沉积物质量均满足海洋功能区的要求。

Based on the investigation on 6 heavy metals(Cu、Pb、Zn、Cd、Cr、As)at 20 sotes in Haikou Bay in October 2018,the distribution of heavy metals were analyzed,heavy metals content was evaluated with single factor index method.Results showed that copper(Cu)content was measured between 2.68×10^-6 and 47.06×10^-6 with average 16.21×10^-6,lead(Pb)content between 12.05×10^-6 and 49.51×10^-6 with average 28.36×10^-6,zinc(Zn)content between 18.33×10^-6 and 236.05×10^-6 with average 64.90×10^-6,cadmium(Cd)content between 0.10×10^-6 and 1.01×10^-6 with average 0.29×10^-6,Chromium(Cr)content between 14.23×10^-6 and 84.37×10^-6 with average 52.82×10^-6,arsenic(As)content between 2.22×10^-6 and 16.05×10^-6 with average 10.38×10^-6.The content of heavy metals highest value at site 17 and 18.Except that the Cu、Zn、Cd、Cr content of site 17 and the Cd content of site 18 does not conform to the functional zoning,the sediment quality of other stations conform the marine environmental requirements of the functional zoning.