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Title (Primary) Hydrothermal treatment for regeneration of activated carbon loaded with organic micropollutants
Author Sühnholz, S.; Kopinke, F.-D.; Weiner, B.;
Journal Science of the Total Environment
Year 2018
Department TUCHEM;
Volume 644
Language englisch;
POF III (all) T41;
Keywords Activated carbon; Hydrothermal treatment; Wastewater treatment; Organic pollutants
Abstract Hydrothermal treatment (HT) at 200 °C and 240 °C for 4 and 16 h was studied for the regeneration of granular activated carbon (AC) loaded with a range of organic micropollutants having a broad range of physico-chemical properties. Carbamazepine, diazinon, diclofenac, estrone, iohexol, metoprolol and sulfamethoxazole were fully converted. Limits were seen for the conversion of caffeine, ibuprofen and perfluorooctanesulfonate (PFOS). However, the degree of degradation was enhanced for the latter compounds in the adsorbed state as compared to experiments in aqueous solution. The methodology was tested in five loading and regeneration cycles for selected compounds with no change of the degradation potential and of the AC properties. In particular, the surface properties of the AC did not deteriorate upon HT as determined by the specific surface area (from BET isotherms), the point of zero charge, and the surface functional groups (from diffuse reflectance IR spectroscopy). As the total concentration of the loaded pollutants was minimized by HT, this method could be considered as a new low temperature regeneration technology for spent AC.
ID 20993
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=20993
Sühnholz, S., Kopinke, F.-D., Weiner, B. (2018):
Hydrothermal treatment for regeneration of activated carbon loaded with organic micropollutants
Sci. Total Environ. 644 , 854 - 861