Carboxyl-functionalized biochar derived from walnut shells with enhanced aqueous adsorption of sulfonamide antibiotics
| Autor: | Zehua Zhao, Siying Lv, Xinxiang Geng, Shihai Cui, Jing Yang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
0208 environmental biotechnology Juglans 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Hydrophobic effect symbols.namesake Adsorption X-ray photoelectron spectroscopy Spectroscopy Fourier Transform Infrared Biochar Freundlich equation Fourier transform infrared spectroscopy Waste Management and Disposal 0105 earth and related environmental sciences Sulfonamides Aqueous solution Chemistry General Medicine Anti-Bacterial Agents 020801 environmental engineering Kinetics Charcoal symbols Raman spectroscopy Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | Journal of Environmental Management. 280:111749 |
| ISSN: | 0301-4797 |
| DOI: | 10.1016/j.jenvman.2020.111749 |
| Popis: | The novel HNO3-modifitied biochar (NBC) was synthesized from walnut shell. The NBC was characterized from scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectrum. The NBC was then used in the adsorption of sulfadiazine, sulfamethazine and sulfachloropyridazine from aqueous solution. The material surface has carbon/oxygen-contained groups, which is benefit for the adsorption. The results showed the adsorption ability of NBC on three sulfonamides were 32, 46, and 40 mg g−1, respectively. The kinetic was found to follow the Elovich model and the isotherm conformed Freundlich. Adsorption was more favorable at weak acidic solution. The interactions mainly include π - π EDA, electrostatic interaction, Lewis acid-base interaction, hydrophobic interaction and H-bond. |
| Databáze: | OpenAIRE |
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