Photocatalytic Decolorization of Commercial Acid Dyes using Solar Irradiation
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2009
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Resumo |
This work investigates the solar heterogeneous photocatalytic degradation of three commercial acid dyes: Blue 9 (C.I. 42090), Red 51 (C.I. 45430), and Yellow 23 (C.I. 19140). TiO(2) P25 from Degussa was used as the photocatalyst. The dyes were completely degraded within 120 min of treatment in the following increasing order of removal rate: Blue 9 < Yellow 23 < Red 51. The photocatalytic color removal process was well described by a two-first-order in-series reaction, followed by another first-order reaction. Photolytic experiments showed that this process is quite inefficient and highly selective towards Red 51 only. The dyes` solution was completely decolorized and organic matter removals up to 99% were achieved with photocatalysis. The lack of selectivity and the possibility of using solar light to excite the photocatalyst are promising results regarding the feasibility of this technology. FAPERJ FAPERJ |
Identificador |
WATER AIR AND SOIL POLLUTION, v.204, n.1/Abr, p.79-87, 2009 0049-6979 http://producao.usp.br/handle/BDPI/31827 10.1007/s11270-009-0028-6 |
Idioma(s) |
eng |
Publicador |
SPRINGER |
Relação |
Water Air and Soil Pollution |
Direitos |
restrictedAccess Copyright SPRINGER |
Palavras-Chave | #Photocatalysis #TiO(2) #Acid dye #Solar #Decolorization #AZO DYES #FOOD-ADDITIVES #VISIBLE-LIGHT #DEGRADATION #TIO2 #ERYTHROSINE #OXIDATION #SURFACES #WATER #ADSORPTION #Environmental Sciences #Meteorology & Atmospheric Sciences #Water Resources |
Tipo |
article original article publishedVersion |