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以我国中南地区几种主要地带性土壤为材料，比较了物理、化学方法的浓缩效果，结合Ｘ－射线分析，探讨了高梯度磁场分选（ＨＧＭＳ）后土壤胶体的矿物类型、氧化铁种类的变化。结果表明：ＨＧＭＳ处理后，土壤粘粒层状硅酸盐矿物含量相对减少，高岭含量减小的幅度较大，而２∶１型矿物含量变化幅度较小；ＨＧＭＳ处理后，氧化铁矿物中的Ｇ／（Ｇ＋Ｈ）基本上不发生变化；对以２∶１型层状硅酸盐为主的土壤粘粒，用ＨＧＭＳ方法处理得到的氧化铁矿物含量高于用５ｍｏｌ／ＬＮａＯＨ溶液处理得到的氧化铁矿物含量
In this paper, the effects of enrichment by physical and chemical methods were compared with several major zonal soils in central and southern China. The mineralogical types and soil types of soil colloids after high gradient magnetic field separation (HGMS) were discussed by X-ray analysis Variety. The results showed that the contents of clay minerals in the soil clay decreased, the contents of kaolinite decreased obviously, but the content of 2:1 minerals changed little after HGMS treatment. After HGMS treatment, the content of iron oxide minerals (G + H) did not change. For the clay with 2:1 type layered silicate, the content of iron oxide obtained by HGMS method was higher than that treated by 5mol / L NaOH solution The resulting iron oxide mineral content