Spectroscopic investigation in the mid- and far-infrared regions of phosphorus fertilizers derived from thermochemically treated sewage sludge ash
- Inorganic phosphorus and nitrogen-phosphorus-potassium (NPK) fertilizers based on phosphates from thermochemically treated sewage sludge ash were analyzed using mid-infrared (mid-IR) and far-infrared (FIR) spectroscopy. The different compounds present in the fertilizers were qualitatively determined with the help of recorded reference spectra of pure substances. Differentiation between various phosphates and other compounds such as sulfates, nitrates, and oxides was possible using combined interpretation of the mid-IR and FIR spectra. The results are in agreement with previous X-ray diffraction (XRD) measurements of the same samples. The main phosphate phases detected were NH4H2PO4, MgHPO4·3H2O, Mg3(PO4)2, Ca5(PO4)5Cl, CaHPO4·2H2O, Ca(H2-PO4)2·H2O, and AlPO4. Furthermore, K2SO4, NH4NO3, Fe2O3, and SiO2 were identified in the IR spectra. However, ammonium and sulfate compounds were only identified in the mid-IR region but were not detectable in the FIR region.
Autor*innen: | Christian VogelORCiD, Anka Kohl, Christian AdamORCiD |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Applied spectroscopy |
Jahr der Erstveröffentlichung: | 2011 |
Verlag: | Society for Applied Spectroscopy |
Verlagsort: | Frederick, Md. |
Jahrgang/Band: | 65 |
Ausgabe/Heft: | 3 |
Erste Seite: | 265 |
Letzte Seite: | 271 |
Freie Schlagwörter: | Far-infrared spectroscopy; Fertilizer; Mid-infrared spectroscopy; P-fertilizer; Phosphorus compounds; Sewage sludge ash |
DOI: | 10.1366/10-06168 |
ISSN: | 0003-7028 |
ISSN: | 1943-3530 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 21.02.2011 |