| Autor: |
Abielaala, Loubna, Aouad, Hakima, Mesnaoui, Mohamed, Musso, Jean A. |
| Zdroj: |
Sustainable Environment Research; 2011, Vol. 21 Issue 3, p195-201, 7p, 1 Black and White Photograph, 1 Chart, 8 Graphs |
| Abstrakt: |
The environmental problems of fly ashes from incineration of waste of infectious risk cares (WIRC) so called hospital waste are brought out by several researchers around the world. In the past few years, they have been concerned with problems of storage and use of these ashes. We propose glass forming as a method of storage and recovery after presenting the general characteristics of these ashes. Using X-ray diffraction and chemical analyses, it was found that the fly ashes from WIRC consisted mainly of iron chlorides. Qualitative and quantitative analyses using inductively coupled plasma and scanning electron microscopy allowed the identification of copper, zinc, lead, cadmium and other trace elements. Based on the difference in water solubility of fly ashes constituents, we have separated them into a soluble fraction in which iron chlorides are the major compounds, with a significant amount of cadmium and an insoluble fraction rich in Fe(OH)3 with a large amount of copper and zinc. The fly ash components were stabilized in a phosphate matrix by a glass forming technique. The obtained glass has a significant chemical durability which allows it to be a good candidate for the storage and trapping trace metals containing in the incinerated waste. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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