Modification of cation-exchange properties of activated carbon by treatment with nitric acid
| Autor: | Walter P. Eatherly, Fred H. Sweeton, Edward W. Hagaman, C. Gary Westmoreland, H.R. Child, James S. Johnson, Kurt A. Kraus |
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| Rok vydání: | 1986 |
| Předmět: |
chemistry.chemical_classification
Chromatography Organic Chemistry Inorganic chemistry Ion chromatography chemistry.chemical_element General Medicine Carbon-13 NMR Neutron scattering Biochemistry Analytical Chemistry Acid strength chemistry.chemical_compound chemistry Nitric acid medicine Carbon Activated carbon medicine.drug |
| Zdroj: | Journal of Chromatography A. 354:231-248 |
| ISSN: | 0021-9673 |
| DOI: | 10.1016/s0021-9673(01)87025-4 |
| Popis: | The uptake of inorganic cations by high-surface-area activated carbon can be increased by an order of magnitude by controlled exposure to high concentrations of nitric acid at elevated temperatures. Distribution coefficients of cations are also increased. Acid strength of the functional groups from the nitric acid treatment is greater than those of the starting material. Surface area measurements and small- angel neutron scattering indicate that the increase in effective ion-exchange capacity is not accompanied by gross changes in the structure of the material. 13C NMR on solid samples suggests that the concentration of carboxyl and phenolic functional groups in the carbon is increased by the treatment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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