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Adsorption of carbon dioxide on goethite (α-FeOOH) surfaces, and its implications for anion adsorption

1975; Royal Society of Chemistry; Volume: 71; Linguagem: Inglês

10.1039/f19757101623

2050-5655

James Russell, E. Paterson, A. R. Fraser, V. C. Farmer,

Clay minerals and soil interactions

Carbon dioxide is strongly adsorbed as CO2–3 on moist goethite surfaces, but as both CO2–3 and HCO–3 on dry surfaces. On the basis of a model of the surface, sites for the adsorption of the carbonate species are suggested where these ions would play a role in redistributing surface charge. A similar role is proposed for strongly adsorbed anions such as phosphate.