首钢工业区土壤剖面重金属含量及其结合态的磁指示作用的研究

Magnetic properties as a proxy for contents and forms of heavy metal:case study on a core form Shougang industrial areas

对取自首都钢铁厂附近的土壤样芯进行了重金属含量、形态分析和的磁学测量.探讨了利用磁参数追踪和指示重金属污染和有机结合态和铁锰氧化结合态重金属的可行性.结果表明:土壤样芯中Cu、Pb、Zn、Fe和Mn的含量与χ、SIRM和ARM存在着十分相似的垂向变化特征,且相关关系显著(0.98>R>0.86).进一步对磁化率和Cu、Pb、Zn、Fe和Mn各结合态进行相关分析表明:五种元素的有机结合态与铁锰结合态和磁化率呈显著相关关系(0.98>R>0.56),而交换态和残渣态重金属与磁化率基本不存在相关关系.反映了磁性矿物和和重金属在赋存状态的本质联系.表明了磁性测量可作为工业区土壤重金属污染及有机结合态与铁锰结合态重金属记录信息提取的辅助手段.

Contents and the each form of Pb, Cu, Zn, Cd, Fe, Mn and magnetic parameters＇ values （χ, ARM, SIRM） were measured on a soil core collected near Shougang iron plant. Whether the parameters values can he used as a proxy for heavy metal contents and forms were discussed. The results showed that vertical variations of magnetic parameters were in good agreement with the contents of heavy metals and there is a very significant correlation between magnetic parameters and elevated concentrations of element （Correlation coefficient （0. 98〉 R〉 0. 86）. The correlation between the heavy metal forms and magnetic susceptibility were further analyzed. The results showed that there was a significant correlation between magnetic susceptibility and Fe-Mn oxide and the organically bound of heavy metals, Which showed that there was a basic connection between magnetic mineral and heavy metal form. It indicated magnetic measurement can be as a efficiency method to provide the polluting information.