Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.jhazmat.2023.132125
Volltext Autorenversion
Titel (primär) Fe-zeolites for the adsorption and oxidative degradation of nitroaromatic compounds in water
Autor Gawel, A.; Sühnholz, S.; Georgi, A.; Kopinke, F.-D.; Mackenzie, K. ORCID logo
Quelle Journal of Hazardous Materials
Erscheinungsjahr 2023
Department TUCHEM
Band/Volume 459
Seite von art. 132125
Sprache englisch
Topic T7 Bioeconomy
Abstract Nitroaromatic compounds (NACs) are prominent explosives. In this context, these toxic substances were released into the environment and cause long-lasting groundwater contamination. In preparation of a possible in-situ remediation, colloidal Fe-zeolites were investigated for their capabilities as adsorbents and oxidation catalysts. It was shown that the Fe-zeolites FeBEA35 and FeFAU55 are potent inorganic adsorbents for NACs and simultaneously capable of activating H2O2 as Fenton-like oxidation catalysts. Adsorption isotherms of 15 NACs on both zeolites were measured to evaluate the option of coupling adsorptive contaminant enrichment with oxidative degradation. The faujasite-type zeolite FeFAU55 showed a distinct S-type adsorption behaviour and reached significantly higher NAC loadings of > 20 wt%. For FeBEA35, L-type adsorption isotherms and maximum loadings qmax of about 4 wt% were obtained. Degradation of all NACs, monitored by nitrate formation, was observed. Apparent rate constants of the NACs with hydroxyl radicals in a homogeneous, stoichiometric Fenton reaction were related to the heterogeneous system to examine the role of adsorption on the oxidative degradation. Beneficial influence of the adsorption on the oxidation rates was identified. The results of this work open up promising prospects for future application of Fe-zeolites for the in-situ remediation of NAC-contaminated groundwater.
dauerhafte UFZ-Verlinkung
Gawel, A., Sühnholz, S., Georgi, A., Kopinke, F.-D., Mackenzie, K. (2023):
Fe-zeolites for the adsorption and oxidative degradation of nitroaromatic compounds in water
J. Hazard. Mater. 459 , art. 132125 10.1016/j.jhazmat.2023.132125