Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1021/es303885y
Title (Primary) Hydrophobic Fe-zeolites for removal of MTBE from water by combination of adsorption and oxidation
Author Gonzalez-Olmos, R.; Kopinke, F.-D.; Mackenzie, K. ORCID logo ; Georgi, A.
Source Titel Environmental Science & Technology
Year 2013
Department TUCHEM
Volume 47
Issue 5
Page From 2353
Page To 2360
Language englisch
UFZ wide themes RU3;
Abstract Several zeolites were evaluated as adsorbents for the removal of MTBE from water in a screening process. It was observed that the SiO2/Al2O3 molar ratio is a decisive factor for the adsorption properties, at least in the case of ZSM5 zeolites. ZSM5 zeolites with SiO2/Al2O3 ratios >200 were found to provide the best sorption properties for MTBE. To design a combined sorption/reaction method, regeneration of the loaded zeolites by selected advanced oxidation processes (AOP) was studied: (1) Fenton treatment using H2O2 with dissolved iron salts and (2) heterogeneous Fenton-like oxidation with Fe immobilized on the zeolites. The first was ineffective in regenerating loaded zeolites. However, heterogeneous catalysis using Fe species immobilized on the zeolite by liquid ion exchange was markedly more effective. Although these hydrophobic zeolites have a low ion exchange capacity, resulting in iron loadings of ≤0.09 wt %, it was possible to obtain sufficiently active catalysts. Hydrophobic Fe-zeolites can therefore be regarded as promising materials for the removal of MTBE from water, since they allow the combination of efficient adsorption and oxidative degradation of MTBE by H2O2. In contrast to the homogeneous catalysis by dissolved iron ions, these heterogeneous catalysts work at near-neutral pH and can be easily reused. Fe-zeolites as adsorbents/catalysts showed a good stability in both batch and column experiments.
Persistent UFZ Identifier
Gonzalez-Olmos, R., Kopinke, F.-D., Mackenzie, K., Georgi, A. (2013):
Hydrophobic Fe-zeolites for removal of MTBE from water by combination of adsorption and oxidation
Environ. Sci. Technol. 47 (5), 2353 - 2360 10.1021/es303885y