Decolorization of Congo red via hydrodynamic cavitation in combination with Fenton’s reagent
| Autor: | Mohammad-Taghi Sadeghi, Soroush Baradaran, Zahra Askarniya |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Process Chemistry and Technology
General Chemical Engineering Yield efficiency Energy Engineering and Power Technology 02 engineering and technology General Chemistry 010501 environmental sciences 021001 nanoscience & nanotechnology Residence time distribution 01 natural sciences Industrial and Manufacturing Engineering Congo red chemistry.chemical_compound chemistry Reagent Cavitation Response surface methodology 0210 nano-technology Fenton's reagent 0105 earth and related environmental sciences Nuclear chemistry |
| Zdroj: | Chemical Engineering and Processing - Process Intensification. 150:107874 |
| ISSN: | 0255-2701 |
| DOI: | 10.1016/j.cep.2020.107874 |
| Popis: | Congo red is a highly toxic diazoic dye used in textile industries. In this work, the decolorization of Congo red was performed using hydrodynamic cavitation (HC) individually and in combination with H2O2, FeSO4, and Fenton process. Response surface methodology (RSM) was used to design experiments and model the influence of parameters and interactions. Solution initial pH (3–10), H2O2 concentration (0−1000 mg L−1), and FeSO4 concentration (0−50 mg L -1) were selected as the parameters of the experimental investigation. A maximum decolorization of 70 % was achieved using HC in combination with Fenton’s reagent at a H2O2 concentration of 1000 mg L−1, a FeSO4 concentration of 25 mg L−1, and an initial pH of 3 within 60 min. A synergistic coefficient of 3.22 and a yield efficiency of 8.3 × 10-3 mg kJ-1 were obtained for the combined process of HC and Fenton’s reagent. The flow behavior of the HC reactor was investigated using the residence time distribution (RTD) analysis for the first time, and the results demonstrate that the tank-in-series model with two tanks almost fits the HC reactor. |
| Databáze: | OpenAIRE |
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