Chemical or electrochemical techniques, followed by ion exchange, for recycle of textile dye wastewater

Raghu, S.; Basha, C. Ahmed

doi:10.1016/j.jhazmat.2007.03.087

Cited by 276 publications

(95 citation statements)

References 35 publications

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“…As a result, larger amounts of hydroxyl radicals arise through the following sequence of equations (equations [5][6][7][8] 21 reported similar results: they achieved 37% TOC removal during the photoelectrocatalysis of solution of RB-4. Carneiro et al 14 showed that photoelectrocatalysis of a Reactive Orange 16 solution on a TiO 2 thin film irradiated with UV light removes a good amount of TOC (56%).…”

Section: Current Density Effect On the Photoassisted Electrochemical mentioning

confidence: 99%

“…[6][7][8] Nevertheless, these plants generate a large amount of wastewater that has to undergo physical and biological treatment before their discharge into the environment. 9 Unfortunately, these effluents are highly toxic: the natural physical appearance and water coloration change even at very low concentrations of contaminants, which negatively affects photosynthetic processes and consequently, the aquatic ecosystem.…”

Section: Introductionmentioning

confidence: 99%

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Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA^®-Type Electrode

Silva

Andrade

2015

Journal of the Brazilian Chemical Society

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We investigated the photoelectrochemical oxidation of the dye Reactive Blue 4 in the presence of a DSA ® -type electrode of nominal composition Ti/Ru 0.3 Ti 0.7 O 2 under ultraviolet radiation, aiming to enhance the degradation yields of this dye. We conducted the photoelectrocatalytic treatment under galvanostatic control, using an 80 W mercury vapor lamp as the UV source. We also compared unassisted electrooxidative processes and photocatalytic processes with photoelectrochemical oxidation, to gain better insight into the employed advanced oxidation processes and to evaluate their applicability. The photoelectrooxidative process conducted at 37.8 mA cm -2 promoted fast color removal in the tested solution. The chemical oxygen demand and total organic carbon decreased by approximately 64.7 and 42.7%, respectively. High performance liquid chromatography, gas chromatography coupled to mass spectrometry helped to identify the intermediate compounds produced along the photoelectrochemical process, namely phthalic anhydride, phthalimide, phthalide, 1,3-indanone, and benzoic acid.

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Section: Current Density Effect On the Photoassisted Electrochemical mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA^®-Type Electrode

Silva

Andrade

2015

Journal of the Brazilian Chemical Society

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“…According to this procedure, the standard solution was prepared by dissolving 0.1 g of the dye in 1000 mL of distilled deionized water at ambient conditions (pH 7 and 25°C). Then, a set of nine solutions with Remazol blue dye concentrations of 10,20,30,40,50,60,70,80 and 100 mg L −1 were ) as shown in Fig. 4.…”

Section: Standard Curvementioning

confidence: 99%

“…However, these methods concentrate the dye pollutants and necessitate secondary treatment. On the other hand, degradation involving biological processes is not efficient as the synthetic dyes in the effluent are highly structured polymers with low biodegradability [9][10] . Use of conventional dye wastewater treatment methods are becoming increasingly challenging for existing plants due to recent guidelines adopted by water authorities.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Remazol Brilliant Blue Dye Effluent by Advanced Photo Oxidation Process in TiO2/UV and H2O2/UV reactors

Verma¹,

Ghaly²

2008

American J. of Engineering and Applied Sciences

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Advanced oxidation processes involving TiO 2 /UV and H 2 O 2 /UV were evaluated for their potential use in decolorization of textile dye effluents. A coil photo reactor, consisting of UV radiation source and a spiral coil coated with TiO 2, was used to treat synthetic effluent of Remazol Brilliant Blue dye. The TiO 2 coating was performed using the sol-gel technique. The effects of UV radiation, TiO 2 coatings and dye concentration were studied and the results were compared to dye treatment involving H 2 O 2 . The maximum dye removal efficiencies were 7.3, 12.2 and 12.5 % for uncoated, single coat and dual coat of TiO 2 , respectively. The decolorization efficiency was inversely related to dye concentration of the effluent. The treatments with UV only, TiO 2 only, UV+TiO 2 , H 2 O 2 only and UV+H 2 O 2 resulted in color reduction of 7.6, 2.3, 12.5, 4.1 and 99.9 % respectively. The maximum decolorization occurred in ≤ 100 min in all cases. The temperature varied from 29.2 to 54.7°C for UV+TiO 2 treatment and no change in reactor temperature was observed when UV was not used.

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“…A EC tem hoje uma ampla gama de aplicações, dentre as quais se destacam: efluentes têxteis (RAGHU et al, 2007, RAJU et al, 2008, águas residuais de lavanderias (GE et al, 2004), remoção de íon fluoreto (SHEN et al,2003) e tratamentos de efluentes de curtumes (MURUGANANTHAN et al, 2004, ESPINOZA-QUIÑONES, et al, 2009.…”

Section: Introductionunclassified

Planejamento Experimental Do Processo De Eletrocoagulação No Tratamento De Chorume De Aterro Sanitário.

Porto¹,

Yassue²,

Theodoro³

et al. 2014

Anais Do X Congresso Brasileiro De Engenharia Química

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RESUMO -O objetivo deste trabalho é aplicar o processo de eletrocoagulação (EC), no tratamento de chorume de aterro sanitário. Este é um efluente de alta carga orgânica e que provoca alguns males ambientais, e com isso, processos de tratamento sempre estão sendo investigados. A coleta do efluente bruto foi realizada no aterro sanitário da cidade de Cascavel -Pr. O processo foi realizado em escala laboratorial e para avaliar as melhores condições de processo do sistema, foi aplicado um planejamento experimental 3³ completo. Para realização dos experimentos EC, em batelada, foi utilizado um reator de material plástico com uma capacidade de 2 litros de efluente para ser tratado, provido de uma torneira para fácil escoamento do lodo gerado após o tratamento de EC. Os eletrodos, tipo colmeia, foram confeccionados com placas de ferro, com uma largura de 5 cm, altura de 15 e espessura de 3 mm. A distância entre as 6 placas de ferro foi de 2,5 cm. A eficiência do processo foi avaliada com base na redução de demanda química de oxigênio (DQO), cor e turbidez. Os parâmetros operacionais avaliados no reator de eletrocoagulação foram: o pH inicial, tempo e intensidade de corrente. O processo mostra-se eficiente para o tratamento de chorume, devido a facilidade e baixo custo de operação. A maior eficiência na redução dos poluentes verificada no processo de eletrocoagulação foi de 75, 82 e 60% para turbidez, cor e DQO respectivamente, sendo remoções satisfatórias para o tratamento.Palavras chave: EFICIÊNCIA, REMOÇÃO, PARÂMETROS. INTRODUÇÃOA produção de resíduos está cada vez mais acentuada, e com isso a eliminação deles em aterro sanitário é uma parte importante e essencial em todo mundo.Porém, um dos mais graves problemas ambientais relacionados ao aterro é a geração de lixiviados durante o processo de decomposição pela água da chuva que percolam, atingindo as camadas do solo.O chorume é um líquido escuro, de odor desagradável, contendo alta carga orgânica e inorgânica. A composição química e microbiológica do chorume é bastante

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Chemical or electrochemical techniques, followed by ion exchange, for recycle of textile dye wastewater

Cited by 276 publications

References 35 publications

Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA^®-Type Electrode

Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA^®-Type Electrode

Treatment of Remazol Brilliant Blue Dye Effluent by Advanced Photo Oxidation Process in TiO2/UV and H2O2/UV reactors

Planejamento Experimental Do Processo De Eletrocoagulação No Tratamento De Chorume De Aterro Sanitário.

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Chemical or electrochemical techniques, followed by ion exchange, for recycle of textile dye wastewater

Cited by 276 publications

References 35 publications

Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode

Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode

Treatment of Remazol Brilliant Blue Dye Effluent by Advanced Photo Oxidation Process in TiO2/UV and H2O2/UV reactors

Planejamento Experimental Do Processo De Eletrocoagulação No Tratamento De Chorume De Aterro Sanitário.

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Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA^®-Type Electrode

Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA^®-Type Electrode