Decolorization of mono-azo dyes in wastewater by advanced oxidation process: A case study of acid red 1 and acid yellow 23

Shu, Hung‐Yee; Huang, Ching‐Rong; Chang, Ming-Chin

doi:10.1016/0045-6535(94)90060-4

Cited by 156 publications

(79 citation statements)

References 11 publications

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“…al., 1994). In alkaline condition, H 2 O 2 will decompose into water and oxygen rather than hydroxyl radicals (Shu et al, 1994, Galindo et al, 1998. This causes the lower decolourization rates of azo dyes at higher pH values because the concentration of OH • is reduced under these conditions.…”

Section: Effect Of Initial Phmentioning

confidence: 99%

Photooxidation of a reactive azo-dye from the textile industry using UV/H2O2 technology: process optimization and kinetics

Sudarjanto

Keller-Lehmann

Keller

2005

J. of Wat. & Envir. Tech.

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The homogeneous advanced oxidation process of UV/H 2 O 2 was utilized to decolourize CI Reactive Red 195A (RR195A) as one of the most used dyes in the textile industry in Queensland. The UV radiation source was a lowpressure mercury arc lamp (60W emitting at 253.7nm). In this study, the effects of initial hydrogen peroxide (H 2 O 2 ) dosage, dye concentration, pH and temperature were examined to find out the optimum operating conditions of the treatment process. Complete decolourization was achieved in the relatively short time of 20-30 minutes irradiation. Faster decolourization was achieved at low pH and high temperature. The removal rate increased with increasing initial concentration of H 2 O 2 up to an optimum value. The decolourization reaction was found to follow at least initially first order kinetics with respect to the dye concentration. However, even after near complete removal of the active dye from the solution, approximately 60% of the COD was still remaining, indicating only partial breakdown of the dye molecule. In general, the result indicates that the UV/H 2 O 2 technology proved to have good potential for removing dyestuff from wastewater but further treatment might be necessary to achieve complete mineralization of the organic intermediates.

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Section: Effect Of Initial Phmentioning

confidence: 99%

Photooxidation of a reactive azo-dye from the textile industry using UV/H2O2 technology: process optimization and kinetics

Sudarjanto

Keller-Lehmann

Keller

2005

J. of Wat. & Envir. Tech.

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“…A eficiência do ozônio na redução da cor tem sido comprovada em diversos trabalhos, mesmo quando os corantes estão presentes em matrizes complexas, como, por exemplo, efluentes industriais têxteis. Shu et al (1994) e Lin e Liu (1994) observaram uma excelente descoloração de efluentes têxteis em tempos reduzidos de ozonização. Por outro lado, a eficiência do ozônio não foi tão elevada com relação à diminuição da concentração do carbono orgânico total do efluente.…”

Section: Ozonização Convencionalunclassified

Tratamento de efluente da atividade automotiva por ozonização convencional e catalítica

Salla¹,

Paula²,

Pinheiro³

2016

RDAE

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ResumoA lavagem de veículos gera efluentes que conferem alto potencial poluidor aos cursos hídricos. As potencialidades dos processos de ozonização convencional e catalítica na presença de carvão ativado foram avaliadas no tratamento desse efluente, com taxa de aplicação superficial de 0,6.10 -3 m 3 /s.m 2 . Em pH ácido, in natura e básico para o efluente, foram avaliados os parâmetros: cor verdadeira, turbidez e DQO. A fim de avaliar o real potencial oxidativo da matéria orgânica pelo processo de ozonização, os estudos de arraste de gases voláteis por meio do borbulhamento de ar comprimido geraram proporções mínimas de arraste. O processo de ozonização convencional apresentou-se eficiente na descoloração do efluente, porém com baixa redução de matéria orgânica. Na ozonização catalítica, as eficiências na redução aumentaram para todos os parâmetros analisados, sugerindo ao carvão ativado elevada capacidade de catalisação na decomposição do ozônio molecular em radical hidroxila e na atuação como adsorvente, não sendo possível, com base nos experimentos realizados, distinguir o mecanismo preponderante. Palavras

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“…Therefore, a good pretreatment of the aqueous stream should be necessary for UV based AOPs . Decolorisation and treatment of textile effluent were investigated in most studies (Shu et al, 1994, Galindo & Kalt, 1998, , Arslan and Balcıoğlu, 1999, Ince, 1999, Neamtu et al, 2002, Cisneros, 2002, Mohey El-Dein et al, 2003, Azbar et al, 2004, Shu & Chang, 2005. According to these studies, the use of H 2 O 2 /UV process seems to show a satisfactory COD (70-95%) and colour(80-95%) removal performance.…”

Section: S M U C H L E S R E a C T I V E T H A N H Y D R O X Y L R mentioning

confidence: 99%

Decolorisation of Textile Dyeing Effluents Using Advanced Oxidation Processes

Yonar¹

2011

Advances in Treating Textile Effluent

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Decolorization of mono-azo dyes in wastewater by advanced oxidation process: A case study of acid red 1 and acid yellow 23

Cited by 156 publications

References 11 publications

Photooxidation of a reactive azo-dye from the textile industry using UV/H2O2 technology: process optimization and kinetics

Photooxidation of a reactive azo-dye from the textile industry using UV/H2O2 technology: process optimization and kinetics

Tratamento de efluente da atividade automotiva por ozonização convencional e catalítica

Decolorisation of Textile Dyeing Effluents Using Advanced Oxidation Processes

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