High efficiency decolorization of azo dye Reactive Black 5 by Ca-Al particles

This work studies the degradation of azo dye Reactive Black 5 by Ca-Al metallic particles prepared by melt-spinning and ball-milling. The morphology and the phase structure of the metallic powders were characterized and the decolorization efficiency of Reactive Black 5 solutions were assessed by mon...

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Bibliographic Details
Published in:Journal of environmental chemical engineering 2017-12, Vol.5 (6), p.6107-6113
Main Authors: Ben Mbarek, Wael, Pineda, Eloi, Escoda, Lluïsa, Suñol, Joan J., Khitouni, Mohamed
Format: Article
Language:English
Subjects:
Ball milling
Colorants
Colorants, pintures i vernissos
Coloring matter
Compostos intermetàl·lics
Decolorization
Enginyeria química
Indústries químiques
Order-disorder in alloys
Rapid solidification
Reactive black 5
Tractament
Transicions ordre-desordre (Aliatges)
Àrees temàtiques de la UPC
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Summary:This work studies the degradation of azo dye Reactive Black 5 by Ca-Al metallic particles prepared by melt-spinning and ball-milling. The morphology and the phase structure of the metallic powders were characterized and the decolorization efficiency of Reactive Black 5 solutions were assessed by monitoring the dye degradation by ultraviolet-visible absorption spectrophotometry. The decolorization process using the Ca-Al powders showed fast kinetics and high efficiency. 40mgL−1 dye solution was successfully decolorized in 1min using 0.1g/100mL of Ca65Al35 powder, suggesting it as an effective, low-cost means for degradation of azo-compounds.
ISSN:2213-3437
2213-3437
DOI:10.1016/j.jece.2017.11.032