Antimony in incineration bottom ash – Leaching behavior and conclusions for treatment processes
- Antimony (Sb) is used in industrial products mainly as flame retardant in plastic material. Due to such additives in plastics, about a half of Sb ends up in municipal solid waste incineration at the end-of-life and consequently in relevant amounts in the generated bottom ash. In contact with water, the initial leachability is low, as antimonates form sparingly soluble compounds with Ca2+. Following the carbonation of the incineration bottom ash (IBA) during the proceeding ageing the pH in the leachates decreases. With decreasing concentration of Ca in the eluate the solution equilibrium changes and antimonates dissolve. In Germany it is intended to regulate Sb in IBA with the planned implementation of the so called Mantelverordnung (MantelVO, containing provisions on the utilisation of mineral waste) in the near future. The limit values set in the draft might be critical for IBA and therefore pose a risk for the utilisation of the mineral fraction of IBA in the well-establishedAntimony (Sb) is used in industrial products mainly as flame retardant in plastic material. Due to such additives in plastics, about a half of Sb ends up in municipal solid waste incineration at the end-of-life and consequently in relevant amounts in the generated bottom ash. In contact with water, the initial leachability is low, as antimonates form sparingly soluble compounds with Ca2+. Following the carbonation of the incineration bottom ash (IBA) during the proceeding ageing the pH in the leachates decreases. With decreasing concentration of Ca in the eluate the solution equilibrium changes and antimonates dissolve. In Germany it is intended to regulate Sb in IBA with the planned implementation of the so called Mantelverordnung (MantelVO, containing provisions on the utilisation of mineral waste) in the near future. The limit values set in the draft might be critical for IBA and therefore pose a risk for the utilisation of the mineral fraction of IBA in the well-established recycling routes.…
Autor*innen: | Ute KalbeORCiD, Christian VogelORCiD, Franz-Georg SimonORCiD |
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Dokumenttyp: | Beitrag zu einem Tagungsband |
Veröffentlichungsform: | Graue Literatur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | SUM 2020 Proceedings |
Jahr der Erstveröffentlichung: | 2020 |
Organisationseinheit der BAM: | 4 Material und Umwelt |
4 Material und Umwelt / 4.3 Schadstofftransfer und Umwelttechnologien | |
Herausgeber (Institution): | International Waste Working Group (IWWG) |
Erste Seite: | 1 |
Letzte Seite: | 4 |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Sanitär- und Kommunaltechnik; Umwelttechnik |
Freie Schlagwörter: | Antimony; Bottom ash; Leaching |
Themenfelder/Aktivitätsfelder der BAM: | Umwelt |
Umwelt / Circular Economy | |
Veranstaltung: | SUM 2020 – 5th Symposium on Urban Mining and Circular Economy |
Veranstaltungsort: | Online meeting |
Beginndatum der Veranstaltung: | 18.11.2020 |
Enddatum der Veranstaltung: | 20.11.2020 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 23.11.2020 |
Referierte Publikation: | Nein |