利用磁信息研究潮滩重金属污染的探讨

本文以长江口潮滩沉积物的系统磁性测量为基础,对照化学分析和粒度分析等数据,初步探讨了潮滩沉积物的磁性特征与重金属元素含量的相关联系及其机理,建立了重金属元素含量与磁参数的定量关系模型,并揭示了长江口潮滩重金属污染的空间特征及其与沉积环境的联系。本项工作成功地探索了利用磁信息研究潮滩重金属污染的技术路线和应用前景,指出了在一定区域内,利用适量样品的磁性测量与重金属元素分析数据,建立其定量回归模型的可行性。从而可以在区域污染调查中,通过广泛的磁数据测量,由经验公式定量地估算不同滩地部分的重金属元素含量,以全面了解潮滩重金属污染的空间分布,分析其规律和机理。由于磁测方法具有快速、简便、经济、易行等特点,它为大范围的潮滩重金属污染研究提供了一项实用有效的辅助手段。

A PRELIMINARY STUDY ON TIDAL FLAT HEAVY METAL POLLUTION FROM MAGNETIC MEASUREMENTS

This paper presents a magnetic data based study on heavy metal pollution in tidal flat of Yangtze River Delta. Mineral magnetic measurements were carried out on sediment samples taken from the surface of tidal flat and these results were used to compare with those from chemical and particle size analysis. A strong correlation between magnetic parameter and heavy metal contents in sediments was indicated and the regression models were established. Thses models express the numerical relationships between magnetmic parameters and Cu, Zn, Pb concentrations, which can be used to estimate Cu, Zn and Pb contents of the sediments by the magnetic data at different sites of the tidal flat. The spatial pattern of heavy metal pollution and its mechanism were also discussed in this study.Magnetic measurement is of exceptional promise as a complementary method for detailed, large scaled survey or monitoring of heavy metal pollution in the tidal flat by virtue of their rapidness, relative cheapness, ease of use and non-destructive nature.