Analysis of Identification Characteristics and Identification Examples of Hazardous Waste Aluminum-ash Residue
In this study,the elementary composition and phase analysis of 208 aluminum-ash residue samples were carried out,and the identification characteristics of aluminum-ash residue were summarized as follows:aluminum-ash residue is mainly composed of aluminum(Al),silicon(Si),magnesium(Mg),sodium(Na),chlorine(Cl)and other elements.The main phase characteristics of aluminum ash residue identification are alumina(Al2O3),aluminum nitride(AlN)and magnesium aluminum spinel(MgAl2O4),and the phase compositions of aluminum ash residue from different sources are different.This study also used the methods of element correlation analysis and phase composition statistics to distinguish the content and phase composition differences of Al,Si,F,Na and Cl elements from different aluminum ash residue samples collected respectively from storage points,landfill points and aluminum smelting points,so as to further infer the sources of aluminum ash residue.At the same time,according to the above identification characteristics and comparisons with aluminum ash residue samples,it is inferred that the 5 unidentified substances collected are aluminum ash residue samples from landfill sites.The main identification characteristics of aluminum ash residue obtained through analyzing,along with relevant identification examples in this study can provide a reliable reference for correctly identifying aluminum-ash residue and combating hazardous waste transfer and landfill.
aluminum ash residueidentification characteristicsphase componentsidentification case
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