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Publikationstyp
Wissenschaftlicher Artikel
Erscheinungsjahr
2020
Specific adsorption sites and conditions derived by thermal decomposition of activated carbons and adsorbed carbamazepine
Specific adsorption sites and conditions derived by thermal decomposition of activated carbons and adsorbed carbamazepine
Autor:innen
Herausgeber
Quelle
Scientific Reports
10 (2020)
10 (2020)
Schlagwörter
Chemische Verfahrenstechnik, Bautechnik, Werkstoffkunde
Zitation
EISENTRAUT, Paul, Daniel DITTMANN, Caroline GOEDECKE, Ulrike BRAUN und Aki Sebastian RUHL, 2020. Specific adsorption sites and conditions derived by thermal decomposition of activated carbons and adsorbed carbamazepine. Scientific Reports [online]. 2020. Bd. 10 (2020). DOI 10.60810/openumwelt-1480. Verfügbar unter: https://openumwelt.de/handle/123456789/3080
Zusammenfassung englisch
The adsorption of organic micropollutants onto activated carbon is a favourable solution for the treatment of drinking water and wastewater. However, these adsorption processes are not sufficiently understood to allow for the appropriate prediction of removal processes. In this study, thermogravimetric analysis, alongside evolved gas analysis, is proposed for the characterisation of micropollutants adsorbed on activated carbon. Varying amounts of carbamazepine were adsorbed onto three different activated carbons, which were subsequently dried, and their thermal decomposition mechanisms examined. The discovery of 55 different pyrolysis products allowed differentiations to be made between specific adsorption sites and conditions. However, the same adsorption mechanisms were found for all samples, which were enhanced by inorganic constituents and oxygen containing surface groups. Furthermore, increasing the loadings led to the evolution of more hydrated decomposition products, whilst parts of the carbamazepine molecules were also integrated into the carbon structure. It was also found that the chemical composition, especially the degree of dehydration of the activated carbon, plays an important role in the adsorption of carbamazepine. Hence, it is thought that the adsorption sites may have a higher adsorption energy for specific adsorbates, when the activated carbon can then potentially increase its degree of graphitisation. © The Author(s) 2020