河道底泥重金属污染程度评价模式探讨

Explore on evaluation model about heavy metal pollution of river sediment

河道底泥重金属污染已成为当今世界环境污染中危害最大、最难解决的问题之一,逐渐受到大家的重视。合理的评价方法是人们治理污染流域的前提和指导,对于反映河道底泥污染程度至关重要。文中用地积累指数法反映底泥重金属的富集程度;用污染负荷指数法反映重金属对底泥环境的贡献率;用潜在生态危害指数法进行环境生态评价。通过实验来验证方法的合理性,以确定合理的评价模式。

Heavy metal pollution of river sediment has become the world＇s most harmtul environmental pollution and one of most difficult problems, and attracted more and more attentions. A practical method of evaluating the heavy metal pollution of river sediments is the premise for people to treat the polluted river, and also is important for us to get the information to what extent the sediments has been polluted by the heavy metals. In this article, we used the Index of Geo - accumulation to reveal the heavy metals enrichment degree of the river sediments, and Pollution Load Index to measure the contribution rate of the heavy metals to the sediment environment, and Potential Ecological Risk Index to assess the ecological environment. We testified the rationality of these methods by experiments and finally determined a practical evaluation model.