Peat moss-derived biochar for sonocatalytic applications
| Autor: | Jeonggwan Kim, Jeehyeong Khim, Younggyu Son, Beomguk Park |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Peat
Acoustics and Ultrasonics 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis Inorganic Chemistry chemistry.chemical_compound Biochar Rhodamine B Chemical Engineering (miscellaneous) Environmental Chemistry Radiology Nuclear Medicine and imaging Charcoal Rhodamines Organic Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Ultrasonic Waves chemistry Chemical engineering visual_art visual_art.visual_art_medium Degradation (geology) Environmental Pollutants 0210 nano-technology Dispersion (chemistry) Pyrolysis |
| Zdroj: | Ultrasonics Sonochemistry. 42:26-30 |
| ISSN: | 1350-4177 |
| DOI: | 10.1016/j.ultsonch.2017.11.005 |
| Popis: | Peat-moss derived biochar was used as a sonocatalyst for the degradation of rhodamine B (RhB) at different ultrasonic frequencies (40 kHz and 300 kHz). The biochar was prepared by pyrolysis of peat-moss at 300 °C under N2-saturated conditions. High removal efficiency was achieved when biochar (1000 mg L−1) was used as a sonocatalyst in the 40 kHz system, and high removal could be achieved by pre-adsorption and radical oxidation reactions on the surface of the biochar. This was validated in experiments employing radical scavengers. Sonochemiluminescence images and real images of the systems with no biochar, 100 mg L−1 biochar, and 1000 mg L−1 biochar also supported this observation. On the other hand, the addition of the biochar was less effective than expected for the degradation of RhB at 300 kHz. This was due to low dispersion of the biochar in solution in the high frequency system, where relatively weaker sonophysical effects could be obtained. |
| Databáze: | OpenAIRE |
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