Trichloroethylene adsorption from aqueous solutions by activated carbons
| Autor: | Nadezhda S. Golubeva, T. A. Krasnova, I. V. Timoshchuk, N. V. Gora, Oxana V. Belyaeva, A. K. Gorelkina |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Sorbent Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Inorganic Chemistry Adsorption Materials Chemistry medicine Porosity Aqueous solution Renewable Energy Sustainability and the Environment Process Chemistry and Technology Organic Chemistry Microporous material 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical state chemistry Chemical engineering Ceramics and Composites 0210 nano-technology Carbon Activated carbon medicine.drug |
| Zdroj: | Carbon Letters. 30:281-287 |
| ISSN: | 2233-4998 1976-4251 |
| DOI: | 10.1007/s42823-019-00096-y |
| Popis: | We studied trichloroethylene (TCE) adsorption from aqueous solutions in equilibrium conditions by activated carbons (AC). They differ in raw materials, porous structure characteristics and chemical state of the surface. TCE adsorption isotherms were found to have a concave shape, which is characteristic of a sorbent—sorbate weak interaction. It can be a result from electrostatic repulsion of organic matter molecule from polar groups on carbon surface and adsorbed water molecules. The basic parameters of adsorption were calculated by the Dubinin–Radushkevich equation. We determined that for AG-OV-1 and SKD-515 in the coordinates of the Dubinin–Radushkevich equation, there are two linear plots suggesting adsorption in pores of different sizes or reorientation of adsorbate molecules on the activated carbon surface. The efficiency of TCE removal by the activated carbons was evaluated. To reduce the TCE to the maximum allowable, the lowest sorbent consumption was observed for AC with the highest values of surface area and micropore volume. However, the high cost and hydrophobicity of these adsorbents make it impractical to use them in adsorption columns with a fixed layer. We offered an adsorbent that reasonably combines extraction efficiency, ease of operation and economic feasibility. |
| Databáze: | OpenAIRE |
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