title: Quantitative mineralogical composition of complex mineral wastes--contribution of the Rietveld method.
abstract: The objective of the work presented in this paper is the quantitative determination of the mineral composition of two complex mineral wastes: a sewage sludge ash (SSA) and a municipal solid waste incineration fly ash (MSWIFA). The mineral compositions were determined by two different methods: the first based on calculation using the qualitative mineralogical composition of the waste combined with physicochemical analyses; the second the Rietveld method, which uses only X-ray diffraction patterns. The results obtained are coherent, showing that it is possible to quantify the mineral compositions of complex mineral waste with such methods. The apparent simplicity of the Rietveld method (due principally to the availability of software packages implementing the method) facilitates its use. However, care should be taken since the crystal structure analysis based on powder diffraction data needs experience and a thorough understanding of crystallography. So the use of another, complementary, method such as the first one used in this study, may sometimes be needed to confirm the results.
authors: Université de Toulouse, UPS, INSA, LMDC, 135, Avenue de Rangueil, F-31 077 Toulouse Cedex 4, France.
authors: P-Y
authors: PY
authors: Mahieux
authors: J-E
authors: JE
authors: Aubert
authors: M
authors: M
authors: Cyr
authors: M
authors: M
authors: Coutand
authors: B
authors: B
authors: Husson
mesh_terms: D000465:Algorithms; D002244:Carbon / Q000737:chemistry*; D060729:Coal Ash; D018360:Crystallography, X-Ray / Q000379:methods; D017745:Incineration; D016018:Least-Squares Analysis; D008855:Microscopy, Electron, Scanning / Q000379:methods; D008903:Minerals / Q000737:chemistry; D008962:Models, Theoretical; D052638:Particulate Matter / Q000737:chemistry*; D011208:Powders; D012037:Refuse Disposal / Q000379:methods; D012722:Sewage; D012984:Software; D018505:Waste Management / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D060729:Coal Ash; D008903:Minerals; D052638:Particulate Matter; D011208:Powders; D012722:Sewage; D002244:Carbon