泉州湾表层沉积物中重金属的地球化学特征

GEOCHEMISTRY OF HEAVY METALS IN SURFACE SEDIMENT OF QUANZHOU BAY, FUJIAN

本工作据1984年福建海岸带调查采集的样品,测定了泉州湾表层沉积物及其酸可溶部分中Fe,Mn,Cu,Pb,Zn,Cc和Ni的含量,讨论了它们的分布趋势、相互关系和主要来源。

The contents of Fe, Mn, Cu, Zn, Pb, Co and Ni in the surface sediments and acid-soluble fraction collected in the Quanzhou Bay, FuJian in 1984 were determined, their distributions and relationship are discussed in this paper. It has been found that the heavy metal contents in the sediments are Fe: 1.57%—4.15%, mean 3.54%; Mn:(466—806)×10^(-6), mean 623×10^(-6), Cu:(14.5—25.4)×10^(-6),Mean 21.0×10^(-6), Pb:(37.8—85.2)×10^(-6), mean 52.0×10^(-6);Zn: (110—448)×10^(-6), mean 220×10~6; Co: (22.8—44.7)×10^(-6), mean 35.8×10^(-6); Ni: (32.4—49.4)×10^(-6), mean 33.9×10^(-6) respectively. The contents of Pb and Zn in the sediments are higher than those of normal sediments and not controlled either byFe-Mn oxide or organic matter, and their distributions decreases from inside to outside of the Bay, indicating the regional geochemical characteristics which may be affected by the small metal mines along the Fujian Coast. Mn and Pb mostly exist in the acide-soluble fraction and Fe, Cu, Zn, Co and Ni in acid-insoluble fraction. And the results show that there may be a quasi-equilibrium between variour forms of metals in the sediments.