用脸谱图对太子河本溪市区段河流沉积物中重金属污染进行评价的研究

本文将沉积学原理及国际上新发展的两种重金属污染评价方法与多变量的图表示法——脸谱图相结合,对太子河本溪市区段河道沉积物中重金属的污染状况及潜在生态危害进行了综合性的评价研究。从脸谱图上可以直观地看出各采样点重金属的污染情况和潜在生态危害程度。从研究结果可以看出,太子河本溪市区段河道沉积物中重金属的污染是很严重的。

Use the Faces Graph to Evaluate Heavy Metal Pollution in Sediment at Benxi Section of Taizi River

One of the graphical representation of multivariate factors, Chernoff's faces method, is combined with two methods evaluating the heavy metal pollution in sediment and used for checking up on the state of heavy metal pollution in Benxi section of Taizi River.According to the principle that the contents of heavy metals in sediment of a river can indicate the state of heavy metal pollution in the river, 29 samples of sediment are collected from different places of the Benxi section of Taizi River and the contents of seven heavy metal elements, including Cu, Hg, Pb, Cr, Cd, Zn and As, in each of the 29 samples are determined respectively. Then, two methods evaluating the heavy metal pollution, geoaccumulation index method and potential ecological risk index method, are used for calculating and processing the determined data. The both determined data and calculated data are further processed by self-compiled computer program and the corresponding faces are drawn by a printer linked up with a microcomputer. The polluting levels of different heavy metals in each of 29 samples can be directly represented by features on the faces.Tee result of analysis for these data and faces shows that the state of pollution caused by heavy metals in Benxi section of Taizi River is rather serious. According to the degree of the pollution, the sequence of these heavy metals is Cu>Pb>Hg>Cd>As>Zn>Cr, and the degree of pollution of Cu and Pb has been very serious.