深圳湾表层沉积物中重金属的分布

Heavy metals in surface sediments of Shenzhen Bay

本文在1986年4月至1989年1月间深圳湾12次环境调查资料的基础上,报道了6个调查站的表层沉积物中6种重金属元素(Cu、Pb、Zn、Cd、Cr、N(?))的含量及其时空分布特征,以及表层沉积物中重金属的含量与环境因子的相关分析结果,并且对该湾表层沉积物中重金属的污染程度作出了评价,为今后深圳湾环境质量综合评价提供了背景资料。

The concentrations of 6 heavy metals (Cu,Pb,Zn,Cd,Cr and Ni)in the surface sediments collected during April 1986 January 1989 from Shenzhen Bay were determined. The range and average of mass fractions (D. W. ) for Cu, Pb, Zn,Cd, Cr and N(?) were (12. 6～92. 1)×10^(-6), 35. 8×10^(-6); (32. 5～86. 9)×10^(-(?))51. 1× 10^(-6); (71. 2～265. 7)×10^(-6), 124. 0× 10^(-6); (0. 3～2. 6) ×10^(-6), 1. 2 × 10^(-6); (22. 5～76. 0)×10^(-6),46.1×10^(-6)and(14. 5～33. 2)×10^(-6),26.1×10^(-6) respectively. Significant correlations were found between the contents of heavy metals in the surface sediments and those of organic matters in the surface sediments and,those of COD in water. According to the values of the Pollution Evaluation Standard for Surface Sediments recommended by the Techical Group of National Coastal Zone Pollution Comprehensive Survey,the People's Republi(?) of China,the surface sediments from Shenzhen Bay were polluted by Cu,Pb,Zn and Cd.