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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Novel catalytic photochemical and hydrothermal treatment processes for acid dye wastewater.

The purpose of the present study was to evaluate the catalytic effect of a heteropoly acid, namely H4SiW12O40, on aqueous Acid Orange 7, a well-known, representative textile monoazo dye applied to nylon fabrics, in sub-critical water (T = 160 degrees C-290 degrees C; P = 0.6-3.0 MPa, pH = 2.6) and under near-UV-VIS light irradiation (isopropanol: water ratio = 1:10: pH = 2.8). SiW12O40-catalyzed photochemical Acid Orange 7 bleaching was also explored in the presence of two dye assisting chemicals as well as in simulated acid dye wastewater at its natural, acidic pH under otherwise identical reaction conditions. Though less explored than TiO2-mediated, heterogeneous photocatalytic treatment, heteropolyacid-catalyzed thermal and/or photoatalytic re-mediation could be an attractive alternative for the degradation of refractory, colored compounds using relatively mild wet oxidation operating conditions or even natural solar light.[1]

References

  1. Novel catalytic photochemical and hydrothermal treatment processes for acid dye wastewater. Arslan-Alaton, I. Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering. (2003) [Pubmed]
 
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