Characterization and Application of Magnetic Biochars from Corn Stalk by Pyrolysis and Hydrothermal Treatment
| Autor: | Huang Jichuan, Huanjia Lin, Yang Linxiang, Wu Xuena, Xu Peizhi, Peng Zhiping, Tu Yuting |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Langmuir
Environmental Engineering Materials science Aqueous solution Waste management 010405 organic chemistry lcsh:Biotechnology Bioengineering Sorption 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Hydrothermal circulation 0104 chemical sciences Adsorption Chemical engineering lcsh:TP248.13-248.65 Biochar Magnetic biochar Corn stalk Pyrolysis Hydrothermal treatment Phosphate Fourier transform infrared spectroscopy 0210 nano-technology Waste Management and Disposal |
| Zdroj: | BioResources, Vol 12, Iss 1, Pp 1077-1089 (2016) |
| ISSN: | 1930-2126 |
| Popis: | Two novel magnetic biochar composites (FeC-H and FeC-P) were synthesized using corn stalks and ferrous sulfate through hydrothermal method and traditional pyrolysis, respectively. The samples were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), vibrating sample magnetometer, and particle size analyzer. Batch experiments were conducted to investigate the ability of those samples to absorb aqueous phosphate. FeC-H had lower surface area than FeC-P, but more hydrophilic functional groups were detected on the rough surface of FeC-H. The impregnated iron was present as Fe3O4 in the prepared magnetic biochar composites. The introduced Fe3O4 resulted in high performance of magnetic separation and also played the role as adsorption sites for phosphate. FeC-H and FeC-P demonstrated higher sorption capacity than bare Fe3O4 due to the highly dispersed and smaller crystalline sizes of Fe3O4 particles loaded in corn stalk derived-biochar support. FeC-H had the best performance, with Langmuir adsorption capacity as high as 5.04 mg/g for phosphate. These results indicate that the magnetic biochar composites prepared from corn stalks by hydrothermal method (FeC-H) have potential as a high-efficiency and cost-effective adsorbent for phosphorus removal from wastewater. |
| Databáze: | OpenAIRE |
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