Pore structure and adsorption properties of stone active carbons prepared by physicochemical and chemical activation methods
Active carbons (ACs) with diverse microporous and developed mesoporous structures were prepared by chemical and phisochemical activation methods from walnut shells, fruit stones, and grape seeds. The surface chemistry was studied by chemical titration and spectroscopy in the IR, UV, visible, and near IR regions. The ACs prepared by chemical activation contain carboxyl and phosphate groups, which impart acidic properties to the surface. Basic functional groups are mainly formed on the ACs prepared by physicochemical activation. The AC surface has a complicated chemical composition, which results in high adsorpion activity.
Key wordsstone active carbons physicochemical and chemical activations pore structure surface chemistry adsorption properties
Unable to display preview. Download preview PDF.
- 1.T. Lupascu, Activated Carbons from Vegetal Raw Material, Stiinta, Chisinau, 2004, 224 p.Google Scholar
- 2.G. A. Petukhova, N. S. Polyakov, and T. G. Lupashcu, Izv. Akad. Nauk, Ser. Khim., 1995, 1934 [Russ. Chem. Bull., 1995, 44, 1854 (Engl. Transl.)].Google Scholar
- 3.T. Lupascu, L. Monahova, and V. Gonciar, Revue Roumaine de Chimie, 1994, 39, 909.Google Scholar
- 4.Enterosorbtsiya [Enterosorption], Ed. N. A. Belyakov, Center of Sorption Technologies, Leningrad, 1991, 328 pp. (in Russian).Google Scholar
- 5.V. V. Strelko, Yu. F. Korovin, N. T. Kartel’, and A. V. Shcherbitskii, Zh. Prikl. Khim., 1984, 1225 [J. Appl. Chem. USSR, 1984 (Engl. Transl.)].Google Scholar
- 6.T. G. Lupashcu, G. A. Petukhova, R. Nastas, and N. S. Polyakov, Tez. dokl. IX Vseros. simp. “Sovremennye problemy organizatsii poristykh struktur i adsorbtsionnogo razdeleniya veshchestv” [Abstrs IX All-Russia Symp. “Modern Problems of Organization of Pore Structures and Adsorption Separation of Substances] (Klyaz’ma, April 19–23, 2004), Moscow, 2004, 48 (in Russian).Google Scholar
- 8.D. A. Kolyshkin and K. K. Mikhailova, Aktivnye ugli. Svoistva i metody ispytanii. Spravochnik [Active Carbons. Properties and Testing Methods], Khimiya, Leningrad, 1972 (in Russian).Google Scholar
- 9.L. J. Bellamy, Advances in Infrared Group Frequencies, Methuen and Co. LTD, Bungay-Suffolk, 1968.Google Scholar
- 10.N. S. Polyakov, G. A. Petukhova, Ros. Khim. Zh., Moscow, 1995, 39, 7 [Mendeleev Chem. J., 1995, 39 (Engl. Transl.)].Google Scholar
- 11.M. M. Dubinin, L. I. Kataeva, N. S. Polyakov, and V. F. Surovikin, Izv. Akad. Nauk SSSR, Ser. Khim., 1987, 1453 [Bull. Russ. Acad. Sci. USSR, Div. Chem. Sci., 1987, 26, 1341 (Engl. Transl.)].Google Scholar
- 12.L. Sommer, Analytical Absorption Spectrophotometry in the Visible and Ultraviolet, Akademiai Kiado, Budapest, 1989, 311 pp.Google Scholar
- 13.Pribory i metody analiza v blizhnei infrakrasnoi oblasti [Instruments and Methods of Analysis in the Near-Infrared Region], Khimiya, Moscow, 1977, 280 pp. (in Russian).Google Scholar