Degradation of synthetic dye in water by solution plasma process
| Autor: | Ratana Rujiravanit, Jun Kang, Nagahiro Saito, Tetsunori Morishita, Tomonaga Ueno, Gasidit Panomsuwan |
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| Rok vydání: | 2016 |
| Předmět: |
Chromatography
Atmospheric pressure Advanced oxidation process 02 engineering and technology Plasma 010501 environmental sciences 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Absorbance chemistry.chemical_compound Reaction rate constant chemistry Wastewater Rhodamine B Degradation (geology) 0210 nano-technology 0105 earth and related environmental sciences |
| Zdroj: | Journal of the Korean Society of Marine Engineering. 40:888-893 |
| ISSN: | 2234-7925 |
| DOI: | 10.5916/jkosme.2016.40.10.888 |
| Popis: | In this study, the solution plasma process was utilized with the aim of degrading synthetic dyes in water at atmospheric pressure. The experiments were conducted in a batch-type reactor consisting of a symmetric wire-wire electrode configuration with rhodamine B (RhB) as the target synthetic dye. The effects of the plasma treatment time and initial dye concentration on the RhB degradation were investigated by monitoring the change in absorbance of RhB solutions. The RhB solutions turned lighter in color and finally colorless with prolonged plasma treatment time, indicating the destruction of dye molecules. The RhB solutions were found to have degraded, following the first-order kinetic process. However, for high initial RhB concentrations, another kinetic process or factor seems to play a dominant role at the initial degradation stage. The fitted first-order rate constant decreased as the initial concentration increased. This result suggests that the degradation behavior and kinetic process of the RhB solution strongly depends on its initial concentration. The RhB degradation is considered to be due to a combination of factors, including the formation of chemically oxidative species, as well as the emission of intense UV radiation and high-energy electrons from the plasma. We believe that the solution plasma process may prove to be an effective and environment-friendly method for the degradation or remediation of synthetic dye in wastewater. |
| Databáze: | OpenAIRE |
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