Determination of phosphate phases in sewage sludge ash-based fertilizers by Raman microspectroscopy
Christian Vogel1, Christian Adam, Don McNaughton
1Monash University, School of Chemistry, Wellington Road, 3800 VIC Clayton, Australia.
Applied Spectroscopy
|September 27, 2013
Abstract:
The chemical form of phosphate phases in sewage sludge ash (SSA)-based fertilizers was determined by Raman microspectroscopy. Raman mapping with a lateral resolution of 5 × 5 μm(2) easily detected different compounds present in the fertilizers with the help of recorded reference spectra of pure substances. Quartz and aluminosilicates showed Raman bands in the range of 450-520 cm(-1). Phosphates with apatite structure and magnesium triphosphate were determined at around 960 and 980 cm(-1), respectively. Furthermore, calcium/magnesium pyrophosphates were detected in some samples.
