Photocatalytic degradation of various types of dyes (Alizarin S, Crocein Orange G, Methyl Red, Congo Red, Methylene Blue) in water by UV-irradiated titania

Lachheb, Hinda; Puzenat, E.; Houas, Ammar; Ksibi, Mohamed; Elaloui, Elimame; Guillard, C.; Herrmann, Jean-Marie

doi:10.1016/s0926-3373(02)00078-4

Cited by 1,391 publications

(532 citation statements)

References 24 publications

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“…(Lachheb et al 2002;Karkmaz et al 2004). To treat textile wastewater containing azo dyes, one objective is to decolorize recalcitrant azo dyes by destroying the chromophore azo bond to improve its biodegradability.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Acid Blue 161 by Fenton and photo-Fenton processes

Trovó

Hassan²,

Sillanpää

et al. 2015

Int. J. Environ. Sci. Technol.

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Degradation kinetics of azo dye, Acid Blue 161 (AB161), by Fenton and photo-Fenton processes in aqueous solution was investigated. At pH 3.5, the effects of H 2 O 2 , Fe 2? , and H 2 O 2 /Fe 2? molar ratios, on the AB161 decolorization kinetic rates, were evaluated. Experimental results confirmed that the optimal H 2 O 2 /Fe 2? molar ratio of 12 is close to the theoretical value of 11 as predicted by previously developed model. The influence of azo bond loading (L azo bond ), from 0.25 to 1.0, and pH values from 2.5 to 4.0 were evaluated on AB161 decolorization kinetic rates. A correlation between the natural logarithm of the decolorization rates and L azo bond was established at the different pH values. The decolorization rate increased linearly with decreasing L azo bond , in the order of pH: 3.5 [ 3.0 [ 2.5 [ 4.0. UV radiation of Fenton processes increases degradation of AB161 more than 40 % due to the regeneration of Fe 2? through photo-catalytic reactions. This phenomenon was confirmed by measuring H 2 O 2 concentration during the photo-Fenton processes. The results suggest that Fenton processes can effectively decolorize or degrade wastewater containing azo dye, AB161. Photo-Fenton processes may further increase the degradation efficiency of AB161 by 40 %.

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Section: Introductionmentioning

confidence: 99%

Degradation of Acid Blue 161 by Fenton and photo-Fenton processes

Trovó

Hassan²,

Sillanpää

et al. 2015

Int. J. Environ. Sci. Technol.

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“…Remediation of MB using photocatalysis has been widely reported and has become a standard model for the assessment of novel catalysts and novel photocatalytic reactors [19][20][21][22]. In this work a novel photocatalytic reactor (ref) was assessed for the remediation of MB (10µM) in the presence of TiO 2 catalyst (10g, 20g, 30g, 40g).…”

Section: Resultsmentioning

confidence: 99%

Remediation of oily wastewater from an interceptor tank using a novel photocatalytic drum reactor

Salu

Adams

Robertson

et al. 2011

Desalination and Water Treatment

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“…6,7 The current interest in ZnO is based on its high spectral response in both UV and visible region which presumably, in some studies, resulted in higher efficiency of photocatalytic degradation well over TiO 2 . [8][9][10][11][12] Based on the aforementioned, ZnO photocatalysis has been proposed as an alternative in the removal of various aqueous pollutants including phenolic compounds. [13][14][15][16][17][18][19][20] Even though benzoquinone has been reported as an intermediate of the degradation of aromatic compounds from different organic classes the case of 1,4-benzoquinone individually as potential pollutant has not yet been paid much attention.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of 1,4-benzoquinone in aqueous ZnO dispersions

Abdollahi¹,

Abdullah²,

Gaya³

et al. 2012

J. Braz. Chem. Soc.

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O presente artigo relata a degradação UV-assistida de 1,4-benzoquinona em suspensões ZnO. As variáveis estudadas incluem a concentração de 1,4-benzoquinona, fotocatalisador, pH e carbono orgânico total. A concentração de 1,4-benzoquinona e o carbono orgânico residual foram medidos usando espectrofotômetro UV-Visível e analisador TOC, respectivamente. Os resultados mostraram que a fotodegradação da 1,4-benzoquinona foi independente do pH. A fotoatividade do ZnO foi máxima na concentração de 1,0 g L -1 e em níveis de 100 mg L -1 de 1,4-benzoquinona. Na faixa de pH 4-10 mais de 80% de 1,4-benzoquinona pode ser removida. ZnO demonstrou capacidade de reutilização no processo.The present paper reports the UV-assisted degradation of 1,4-benzoquinone in ZnO suspensions. The variables studied include the concentration of 1,4-benzoquinone, photocatalyst, pH and the total organic carbon. The concentration of 1,4-benzoquinone and residue organic carbon were measured using UV-Visible spectrophotometer and TOC analyzer, respectively. The results showed that 1,4-benzoquinone photodegradation was independent of pH. The photoactivity of ZnO was maximum at 1.0 g L -1 concentration and at 100 mg L -1 1,4-benzoquinone levels. Within pH 4-10 more than 80% of 1,4-benzoquinone can be removed. ZnO has demonstrated reusability in the process.

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Photocatalytic degradation of various types of dyes (Alizarin S, Crocein Orange G, Methyl Red, Congo Red, Methylene Blue) in water by UV-irradiated titania

Cited by 1,391 publications

References 24 publications

Degradation of Acid Blue 161 by Fenton and photo-Fenton processes

Degradation of Acid Blue 161 by Fenton and photo-Fenton processes

Remediation of oily wastewater from an interceptor tank using a novel photocatalytic drum reactor

Photocatalytic degradation of 1,4-benzoquinone in aqueous ZnO dispersions

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