松花江上游水体沉积物中若干重金属元素的自然背景值

Background Values of Certain Heavy Metal Elements in the Sediments of the Upper Reach of Songhua River

以松花江上游水体具有代表性的柱状沉积物样品作为研究对象,对不同深度沉积物样品重金属含量进行测定,研究流域工业化以前的沉积物样品重金属背景值。结果表明,松花江工业化前沉积物重金属元素含量均呈正态分布。各重金属元素背景值平均值为镉1.72μg/g,铜15.83μg/g,铅23.26μg/g,镍62.16μg/g,锌63.25μg/g,锰329.07μg/g,铁0.63%。与松花江其他支流沉积物背景值相比较,Pb、Cd、Ni的含量明显较高,可能与所研究流域富含铅、镉、镍等矿产有关。

Using sediment core samples representative of the upper reach of Songhua river as objects, the content of heavy metals from the sediment samples at different depths was determined and the background values of pre-industrial sediment samples were studied. The results showed that the content of all the heavy metals in the pre-industrial sediment samples presented a normal distribution. The average background values of the heavy metals in the pre-industrial sediments were as follows： Cd 1.72 μg/g, Cu 15.83 μg/g, Pb 23.26 μg/g, Ni 62. 16 μg/g, Zn 63.25 μg/g, Mn 329.07 μg/g and Fe 0.63%. Compared with the background values of the heavy metals in the sediments of other tributaries of Songhua river, the content of Pb, Cd and Ni in the upper reach was significantly higher, probably resulting from being rich in Pb, Ca, Ni and other minerals in the re-search region.