Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-29703 Zeitschriftenartikel Peplinski, Burkhard; Adam, Christian; Adamczyk, Burkart; Müller, Ralf; Schadrack, Reinhard; Michaelis, Matthias; Emmerling, Franziska; Reuther, H.; Menzel, Michael Evidence of formation of the tridymite form of AlPO4 in some municipal sewage sludge ashes Evidence is provided that the tridymite component observed in the X-ray diffraction patterns of some sewage sludge ashes (SSAs) should not be interpreted as the tridymite modification of SiO2 but as the tridymite form of AlPO4. This proof is based on a combined X-ray Powder Diffraction (XRD), X-ray fluorescence (XRF) and Mossbauer spectroscopy investigation of two SSAs produced at two fluidized bed incineration facilities, located in different municipalities and operated differently. The structural and chemical characterization was carried out on the 'as received' SSA samples as well as on the residues of these two SSAs pretreated by leaching in citric acid. In addition, direct proof is presented that the tridymite form of AlPO4 does crystallize from X-ray amorphous precursors under conditions that mimic the huge heating rate and short retention time (just seconds at T ≈ 850 °C) typical for fluidized bed incinerators. Swarthmore, Pa. JCPDS 2013 Powder diffraction 28 S2 S425 S435 10.1017/S0885715613000869 2016-02-20 OPUS4-24297 Zeitschriftenartikel Peplinski, Burkhard; Adam, Christian; Reuther, H.; Vogel, Christian; Adamczyk, Burkart; Menzel, Michael; Emmerling, Franziska; Simon, Franz-Georg First identification of the tridymite form of AlPO4 in municipal sewage sludge ash Sewage sludge and sewage sludge ashes (SSA) are produced in huge amounts at municipal waste water treatment plants (WWTP) all around the world and have become an issue for many urbanized areas. To deal with this unceasing mass flow in an ecologically and economically responsible way a comprehensive chemical and structural characterization of all types of SSA is needed. X-ray powder diffraction (XRD) is one of the most promising analytical methods for this task. Although, there has been ample chemical evidence showing that many SSA contain aluminium phosphate as a major component up to now no aluminium phosphate or aluminium-rich mixed phosphate phase has been reported to be identified by XRD in a SSA produced at a mono-incineration facility. The outcome of the present com-bined XRD and Mossbauer spectroscopy investigation provides comprehensive evidence closing this gap for the first time. München Oldenbourg 2011 Zeitschrift für Kristallographie 1 443 448 10.1524/zkpr.2011.0067 2016-02-19