Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.jhazmat.2023.132125
Document author version
Title (Primary) Fe-zeolites for the adsorption and oxidative degradation of nitroaromatic compounds in water
Author Gawel, A.; Sühnholz, S.; Georgi, A.; Kopinke, F.-D.; Mackenzie, K. ORCID logo
Source Titel Journal of Hazardous Materials
Year 2023
Department TUCHEM
Volume 459
Page From art. 132125
Language 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.
Persistent UFZ Identifier
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