| Autor: |
Shailesh S. Sable, Anett Georgi, Sandra Contreras, Francesc Medina |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Water-Energy Nexus, Vol 4, Iss , Pp 95-102 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2588-9125 |
| DOI: |
10.1016/j.wen.2021.06.001 |
| Popis: |
Two types of iron-containing zeolites with different surface hydrophobicity, Fe-ZSM5 (SiO2/Al2O3 = 26) and Fe-ZSM5 (SiO2/Al2O3 = 236) were studied as adsorbents and catalysts for oxidation of phenol by means of a Fenton-like process at ambient conditions and nearly neutral pH, with and without in-situ generation of H2O2. Adsorption of phenol is more favorable on high silica Fe-ZSM5 (236) zeolite due to its higher surface hydrophobicity. Palladium (Pd) immobilization on Fe-ZSM5 zeolites has a positive impact on phenol degradation with a synergistic role of Pd and Fe (II)/(III) for activation of H2O2. The best result for phenol conversion and mineralization was observed over both hydrophilic and hydrophobic 0.1 wt.% Pd/Fe-ZSM5 with commercial H2O2 achieving ≥ 90% conversion of phenol (100 mg/L) in 4 h and 60–63% mineralization in 6 h with 5 g/L catalyst and 5 g/L H2O2. In addition, Pd/Fe-ZSM5 can be used for in-situ formation of H2O2 using formic acid as H-source and externally supplied oxygen. The combination of these processes provided by this adsorbent/catalyst material is exploitable for on-site oxidative regeneration of zeolite adsorbents. This study shows that Fe-containing zeolites are promising catalysts for a combined approach of adsorption/oxidative degradation of phenol by commercial or in-situ produced H2O2. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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