土壤中铁铝氧化物与黏土矿物交互作用的研究进展

铁铝氧化物与黏土矿物是土壤中最重要、最活跃的固相组分之一,一般占土壤质量的90%以上,它们之间的交互作用直接影响土壤界面活性、理化性质和肥力状况.本文以铁铝氧化物和黏土矿物胶结过程中的一些表观特征变化为出发点,重点阐述了交互作用前后对土壤理化性质的影响,以及宏观表现到微观交互作用的机理,并提出了宜加强二者交互作用的界面特性、非晶形向晶形转化过程等的研究,以期揭示土壤退化、团聚体形成、元素的保蓄与释放、土壤污染物的调控等土壤的基本属性问题.

Advancement in the Study on Interactions between Iron-aluminum (Hydro-) Oxides and Clay Minerals in Soil

Iron-aluminum (hydro) oxides and phyllosilicates are two most important and active solid components in soil, accounting for over 90 percent in soil mass. Interactions between the two in the soil directly affect interface activity, physico-chemical properties, and fertility of the soil. Based on variation of some apparent characteristics displayed during the process of cementation of iron-aluminum (hydro) oxides with clay minerals in soil, effects of their interactions on physico-chemical properties of the soil were elucidated, and mechanisms of the interactions in both macro- and micro-scales discussed. It is proposed that more efforts be made to study interface characteristics and process of the transformation from non-crystal to crystal, in an attempt to further understanding of some soil basic problems, such as soil degradation, aggregate formation, element adsorption and desorption, control of soil pollutants, etc..