Generally, soils possess net electric charge which could attract metal cation.We could use of this property to adsorb metal cations or replace inorganic cations and remove heavy metal contamination.

• 由于一般土壤大多带阴电荷，所以可用来吸附金属阳离子，并利用此特性进行土壤中重金属污染之吸持或取代去除。