不同粒径铁锰结核的地球化学特征的研究

Research on the Geochemical Character of Different Sizes of Iron-anganese Nodules

[目的]了解一些重金属元素在土壤中的迁移、溶解和沉淀及影响条件。[方法]对黎塘岩溶区不同粒径铁锰结核的颜色及元素含量进行了研究。[结果]结果表明,该区域的铁锰结核主要是高铁低锰的结核;对于不同粒径的氧化物含量各不相同,同一粒径的氧化物含量中以氧化铁为主;而在重金属含量中,该区域的铁锰结核主要是富集Cr(VI)、Pb等几种元素。[结论]研究结果对植物的吸收、作物营养的有效性和土壤的改良等都具有重要的意义。

The magration, dissolution and precipitation of some heavy metal elements in soil and the effects of condition on it were explored. [ Method] The color and element of different sizes of iron-nmnganese nodules in the Litang Karst area were studied. [ Results ] The results showed that the nodules with high contain of iron and low contain of manganese was main iran-manganese nodules in the region;the oxide content varied with the variation of nodule size and the oxide content in the same size mainly was iron oxide. In heavy roetals, Cr （VI）, Pb and other several dements were rich in iron-manganese nodule in the region. [Conclusion] The result was of great significance in the plant-absorbing,the effectiveness of crop nutrition and soil improvemerit.