Adsorption of copper and cobalt from fresh and marine systems

Details Adsorption of copper and cobalt from fresh and marine systems Adsorption of copper and cobalt from fresh and marine systems

Nov 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975gecoa..39.1531o&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 39, Issue 11, pp.1531-1543

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Scientific paper

The adsorption of copper and cobalt from aqueous solution on to illite and other substrates has been studied as a function of pH, solution composition and solid phase concentration. The results are interpreted in terms of a model whereby the trace metals are adsorbed in exchange for surface bound H + ions. Adsorption varies with solution ionic strength and the concentrations of complex forming ligands; both of these parameters tend to reduce the trace metal adsorption. The Cu 2+ is two orders of magnitude more reactive toward solid surfaces than Co 2+ , which is consistent with the general reactivities of these two metal ions. It is also found that Mg 2+ interferes with adsorption, presumably by competing with the trace metals for the surface sites. A quantitative model was developed which describes adsorption of these metals from natural waters ranging from river water to sea water as a function of pH, complexing ligands and magnesium activity.

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