| Autor: |
da Silva, F. P., Casellato, A., da Fonseca, F. V. |
| Předmět: |
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| Zdroj: |
International Journal of Environmental Science & Technology (IJEST); Jan2024, Vol. 21 Issue 2, p1605-1618, 14p |
| Abstrakt: |
Coordination compounds are formed by the reaction between ligands in the presence of one or more metal centers. In the present work, a copper(II) complex (CuL) was synthesized and evaluated as a catalyst in a Fenton-like reaction for the degradation of organic pollutants, using the reactive dye Drimaren Red X-6BN (DRX-6BN) as a model substrate, in the absence of light. Kinetic studies with DRX-6BN and soluble chemical oxygen demand removal were developed under the condition of a face-centered cube central composite design (CCD) (CCDoptimum) and its variations. The model obtained by CCD proved to be reliable for predicting the results in the studied ranges. The highest reaction rate (kapp = 4.05 × 10–2 min−1) and DRX-6BN removal (90.17 ± 0.52%) were reached at pH 8.82 ± 0.05 and initial hydrogen peroxide (H2O2) and CuL concentrations of 1.17 × 10–2 and 2.67 × 10–4 mol L−1, respectively. Concerning the mechanism, degradation involves dye adsorption onto CuL and oxidation by hydroxyl radicals (·OH) mainly. Mineralization after 60 min was around 50 and 60% under various conditions. The catalyst was significantly stable after storage and could be reused for three cycles, losing about 20% of the total activity. These results suggest that CuL is a promising catalyst for Fenton-like reactions for the degradation of pollutants. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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