氧化铁是土壤中常见的氧化物,其中较为普遍的是针铁矿和赤铁矿,在某些土壤中也含有纤铁矿和无定形氧化铁。它们通常以极小的颗粒单独存在,或以胶膜状包裹在其它矿物颗粒的外面,有较大的比表面积,易受环境的影响,因此具有较高的活性,并对许多土壤的物理化学性质产生重要的影响。某些重金属离子和某些污染物进入土壤后的动向和 Iron oxide is a common oxide in soils. The more common ones are goethite and hematite, and some soils also contain lepidocrocite and amorphous iron oxide. They are usually present as very small particles, or as a film-like coating on the outside of other mineral particles, have a large specific surface area, are susceptible to the environment, and therefore have high activity and are of many soil physicochemical Nature has a significant impact. Some heavy metal ions and some pollutants into the soil after the action and