摘要
离子扩散是土壤物质迁移传输的重要形式,影响整个地球化学物质循环。本文综述了土壤中离子扩散的基本理论,对表征土壤中离子扩散快慢的参数(扩散活化能和离子扩散系数)进行了详细的阐述。其中水分状况、孔隙度、温度、离子种类、pH、土壤电荷性质等都对离子扩散系数产生影响。最后,展望了考虑外电场中离子扩散方程来描述土壤中的离子扩散过程是一个新的方向。
Ion diffusion is an important style of mass transport in soil, which may control the movement of mass on the earth. Current findings of the theory on ion diffusion in soils and ion diffusion coefficient and diffusion activation energy are here in summarized and reviewed. Researchers have revealed that many factors influence the diffusion coefficient, e.g. water content, soil texture, pH, CEC and so on. The research of ion diffusion in soil as considering the effect of electric field from soil particle surface, application in practice and future trends are presented.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第6期1467-1472,共6页
Chinese Journal of Soil Science
基金
国家自然科学基金(40371061)
重庆市教委科技项目(KJ091206)
重庆文理学院科研启动基金共同资助
关键词
土壤
离子扩散
Soil
Ion Diffusion
