Glass bead/x-ray fluorescence spectrometry of the sludge incineration ashes generated in sewage processing
was developed for the determination of ten major components (Na2O, MgO, Al2O3, SiO2, P2O5, K2O, CaO,
TiO2, MnO, Fe2O3) and five minor elements (Zn, Cu, Cr, As, Pb). Sewage sludge ashes consisted of rockforming
minerals and phosphate crystals that had been used for phosphorus removal. Ash samples were
melted and molded with lithium tetraborate to 35 mm diameter glass disks in a PtAu crucible. Analytical
results of ten major components and five minor elements agreed well with the recommended values of a
phosphate rock standard reference material (NIST SRM 694). Elemental compositions of sewage sludge
ash from seven sewage-processing plants in Japan were determined using this method. Concentrations
of Fe2O3, SiO2, and CaO, along with loss of ignition in sewage sludge ash mutually differed among the
sewage-processing plant products. Seasonal variations in concentrations of ten major components and
five minor components of ash samples produced from October 2001 to September 2002 were determined
using the proposed method. Concentrations of SiO2increased with the inflow of gravel by rainfall, thereby
decreasing concentrations of P2O5 originating from excreta and microorganisms. Copyright 2008 John
Wiley & Sons, Ltd. KATANAX K1全自动电热融熔机 KATANAX K2全自动电热融熔机
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