摘要
本文应用碘铋酸铯沉淀法测定了厦门西港和九龙江口沉积物中的^(137)Cs,并计算了厦门西港Ⅰ、Ⅱ和九龙江口三个站位的沉积速率,分别为4.33,4.85和0.43cm/a。^(137)Cs法与^(210)Pb法在测定近岸海洋现代沉积速率的一致性,表明^(137)Cs法是一种有意义的参照方法。^(137)Cs法测定的沉积速率略低,与沉积物再悬浮造成的^(137)Cs再迁移和重新分布有关。厦门西港^(137)Cs沉积通量高于九龙江口,表明厦门西港不利于泥沙和污染物质向外排出。
The concentration of 137Cs in the sediments in the Xiamen Western Harbour and the Jiulong River estuary were measured with the method of the precipitation of Cs3Bi2Ig.The consistence between the 137Cs method and 210Pb method in recent sedimentation rates in the coastal marine environments suggested that 137Cs method is significant reference.Sedimentation rates derived from 137Cs method are somewhat lower than that devived from 210Pb method,owing to the remobilization and redistribution of 137Cs by resuspension of the sediments.The sedimentation fluxes of 137Cs in the harbour were greater than that in the estuary,indicating the silt and pollutants could not be easily removed from the harbour.
出处
《海洋通报》
CAS
CSCD
北大核心
1991年第3期63-68,共6页
Marine Science Bulletin
