厦门港湾表层沉积物中重金属的富集和来源探讨

DISTRIBUTION AND SOURCES OF HEAVY METALS IN SEDIMENTS FROM THE XIAMEN HARBOUR

本文比较了厦门港湾的浔江、西港和九龙江口等3个区表层沉积物及其酸可溶部分中Fe,Mn,Cu,Zn,Pb,Co和Ni的含量,分析了各组分之间的相互关系,探讨了各重金属元素的主要来源。

The total and acid-soluble contents of Fe,Mn,Cu,Zn,Pb,Co and Ni in the sediments from three regions of the Xiamen Harbour,i.e.the Xun Jiang,the Xigang Harbour and the Jiutong Jiang Mouth,have been measured and the chemical components have been correlated to each other.The metal contents from the three regions are found to follow the order,the Jiulong Jiang Mouth≈tne Xigaag Harbour>the Xun Jiang.The metal speciation in the Jiulong Jiang Mouth is also similar to that in the Xigang Harbour but differs from that in the Xun Jiang.A significant enrichment of Pb and Zn has been observed in the sediment from the Xiamen Harbour.Three major sources contribute differently to the heavy metals in the harbour sediments:for Pb,riverine anthropogenic input>urban waste>weathering;for Zn,urban waste≥riverine anthropogenic input>weathering;for Fe,Mn,Cu,Co and Ni,weathering>urban waste>riverine anthropogenic input.The recent accumulation of metals in the Xiamen Harbour decreases as Zn,Pb>Cu>Fe,Mn,Co and Ni.The siltation of navigational channel in the Xigang Harbour can be attributed to a certain degree to the silt input from the Jiulong Jiang River.