Fabrication of magnetic activated carbons from corn cobs using the pickle liquor from the surface treatment of iron and steel
| Autor: | Steven Harrington, Yanqing Ma, Fang Wang, Yan-qiu Dang, Xun Tian |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Carbonization Materials Science (miscellaneous) Kinetics 02 engineering and technology Hematite 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Endothermic process 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Chemical engineering visual_art Monolayer Methyl orange visual_art.visual_art_medium General Materials Science 0210 nano-technology Magnetite |
| Zdroj: | New Carbon Materials. 33:303-309 |
| ISSN: | 1872-5805 |
| DOI: | 10.1016/s1872-5805(18)60340-3 |
| Popis: | Corn cobs were impregnated with the pickle liquor from the surface treatment of iron and steel at ambient temperature for 24 h, dried at 393 K for 12 h and carbonized at 573, 773 and 973 K for 1 h to obtain magnetic activated carbons (MACs). The adsorption of methyl orange (MO) onto the MACs was investigated under different conditions. Results show that the surface area of the MACs increases with carbonization temperature from 423.5 to 784.8 m2 g−1. The MACs consist of hematite (Fe2O3) and magnetite (Fe3O4). The MAC obtained at 973 K has the highest MO monolayer adsorption capacity of 555.56 mg g−1 at 298 K in a water sample containing MO dye. The adsorption is endothermic and obeys pseudo-first-order kinetics. The MACs can be easily separated from the dye water by an external magnet. |
| Databáze: | OpenAIRE |
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