A SURFACE PRECIPITATION MODEL FOR THE SORPTION OF CATIONS ON METAL-OXIDES
A SURFACE PRECIPITATION MODEL FOR THE SORPTION OF CATIONS ON METAL-OXIDES
复制标题
DOI：
10.1016/0021-9797(85)90400-x
复制
发表时间：
1985-01-01
影响因子：
9.9
通讯作者：
MOREL, FMM
中科院分区：
文献类型：
--
作者：
FARLEY, KJ;DZOMBAK, DA;MOREL, FMM
提出了一种新的金属氧化物表面阳离子吸附模型，该模型考虑了表面反应和沉淀之间的连续性。该模型扩展了表面络合的方法，通过考虑沉淀在固体上所描述的形成的固溶体，其组成之间的原始固体和吸附阳离子的纯沉淀物连续变化。证明了表面沉淀模型描述金属阳离子在无定形氢氧化铁上的平衡吸附的能力。该模型也可以扩展到描述阳离子竞争和阴离子吸附。
A new model for the sorption of cations on metal oxides is formulated which allows for a continuum between surface reactions and precipitation. The model extends the surface complexation approach by considering precipitation on the solid to be described by the formation of a solid solution whose composition varies continuously between that of the original solid and a pure precipitate of the sorbing cation. The ability of the surface precipitation model to describe the equilibrium sorption of metal cations on amorphous iron hydroxide is demonstrated. The model can also be extended to describe cation competition and anion sorption.