Degradation and toxicity depletion of RB19 anthraquinone dye in water by ozone-based technologies
| Autor: | Maria Laura Fiasconaro, Carlos Alberto Martin, Maria Eugenia Lovato |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Ozone Ultraviolet Rays 0211 other engineering and technologies Anthraquinones 02 engineering and technology 010501 environmental sciences Mass spectrometry Photochemistry 01 natural sciences Anthraquinone Gas Chromatography-Mass Spectrometry Water Purification chemistry.chemical_compound Toxicity Tests Coloring Agents Degradation pathway 0105 earth and related environmental sciences Water Science and Technology 021110 strategic defence & security studies Mineralization (soil science) Anthraquinone dye Aliivibrio fischeri Solutions chemistry Toxicity Gas chromatography Water Pollutants Chemical |
| Zdroj: | Water science and technology : a journal of the International Association on Water Pollution Research. 75(3-4) |
| ISSN: | 0273-1223 |
| Popis: | This research investigated the discoloration and mineralization of Reactive Blue 19 (RB19) anthraquinone dye by single ozonation, single UV radiation and ozonation jointed with UV radiation (O3/UV). The problem was approached from two points of view: with the objective of color removal or the mineralization of solution. In each case, the optimum operating conditions were different. Ozonation was the most effective treatment for color removal, while the combined O3/UV treatment was for mineralization. Major intermediates of the dye degradation were identified by gas chromatography/mass spectrometry and a degradation pathway was proposed. In addition, a clear decrease of the toxicity of the dye was achieved at the end of the experiments. The effect of initial dye concentration, pH, ozone dose, and UV radiation on the degradation of the dye and decrease of total organic carbon was investigated, in order to establish the optimal operating conditions to achieve discoloration, mineralization or a combination of both. |
| Databáze: | OpenAIRE |
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