EFFECT OF INORGANIC AND ORGANIC LIGANDS ON THE MECHANISM OF CADMIUM SORPTION TO GOETHITE - ROLE OF COMPLEXATION AND ADSORPTION
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dc.contributor.author | Collins C.R. | |
dc.contributor.author | Ragnarsdottir K.V. | |
dc.contributor.author | Sherman D.M. | |
dc.date.accessioned | 2021-01-09T05:51:37Z | |
dc.date.available | 2021-01-09T05:51:37Z | |
dc.date.issued | 1999 | |
dc.identifier | https://elibrary.ru/item.asp?id=184836 | |
dc.identifier.citation | Geochimica et Cosmochimica Acta, 1999, , 19, 2989-3002 | |
dc.identifier.issn | 0016-7037 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/22503 | |
dc.description.abstract | Extended X-ray Absorption Fine Structure (EXAFS) spectroscopic data for Cd2+ sorbed on goethite in the presence of phosphate, sulphate and humate indicate that cadmium is surrounded by a first shell of ~6 +/- 1 O atoms at 2.3 +/- 0.1 #9. A second shell of approximately 2 Fe atoms at 3.8 +/- 0.1 #9 is also observed. These interatomic distances suggest that Cd2+ is inner-spherically bound by bidentate double-corner-sharing adsorption on the (110) surface of goethite. In contrast, Cd2+ appears to form a precipitate in the presence of citrate and oxalate. The enhancement of Cd2+ adsorption in the presence of sulphate and phosphate is solely by electrostatic interaction, implying that the ligands sorb to sites other than those occupied by Cd2+. No ternary complexes are observed in the presence of these 2 inorganic ligands. | |
dc.title | EFFECT OF INORGANIC AND ORGANIC LIGANDS ON THE MECHANISM OF CADMIUM SORPTION TO GOETHITE - ROLE OF COMPLEXATION AND ADSORPTION | |
dc.type | Статья |
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