Modelling the solid-solution partitioning of metals in environmental systems

摘要

Metal behaviour in environmental systems is strongly dependent upon speciation, the distribution of a metal among different chemical forms (Florence, 1977; Tessier and Turner, 1995). Speciation is dependent upon the reactions of metal ions with dissolved and particulate chemical species. These range in complexity from small ionic species such as the chloride ion, to highly complex molecules such as humic substances, particulate matter such as clays, and living organisms like algae and bacteria. Complex molecules and solid phases may be polyfunctional, possessing a large number of chemical sites that interact with metal ions to different extents.