Abstract
The physicochemical and surface properties of steelmaking flue dust were characterized by transmission electron microscopy, BET specific surface area, chemical composition analysis, X-ray diffraction analysis, thermogravimetry and differential scanning calorimetry, potentiometric titration, zeta potential and metal ion adsorption. The results show that the dust consists mostly of spherical shaped iron and calcium oxides fine particles, the surface of the dust is negatively charged at pH > 3. The dissolution of iron oxides can be used as a resource of Fe(II) and Fe(III) ions, together with hydrogen peroxide through a Fenton like process to degrade organic dyes in waste water treatment; The existence of calcium oxide gives the dust a high capacity to neutralize strong acid in solution; Owing to the negatively charged surface, large surface area and high alkalinity the dust can also be used as a cheap and very efficient adsorbent for removing metal ions from waste water.
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