Decolorization of antraquinone dye Reactive Blue 181 solution by UV/H2O2 process

Baştürk, Emine; Karataş, Mustafa

doi:10.1016/j.jphotochem.2014.11.003

Cited by 107 publications

(34 citation statements)

References 35 publications

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“…Thermodynamic calculation results were shown in Table The results stated that

Δ_{normalr} H_{m}^{Θ}

values of the two chemical reactions are negative, which was conformed to the exothermic nature of the process . Therefore, increasing the reaction temperature was unfavorable for the two reactions from the thermodynamic point of view.…”

Section: Reaction Mechanismmentioning

confidence: 91%

Wet removal of sulfur dioxide and nitrogen oxides from simulated flue gas by ca(ClO)₂ solution

Zhou

Fan

et al. 2015

Env Prog and Sustain Energy

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To study the simultaneous removal of Sulfur Dioxide (SO2) and Nitrogen Oxides (NOx) from simulated flue gas by wet method, a bubbling device containing calcium hypochlorite (Ca(ClO)2) solution was used in the experiments. In the first place, thermodynamic analysis was conducted to determine the depth of reaction process, and the reaction mechanism of desulfurization and denitration was proposed. After that, experimental results exhibited that SO2 could be removed by Ca(ClO)2 solution completely while the removal efficiency of NOx was 41.2%. Moreover, on the basis of high SO2 removal efficiency, the effects of various factors on the removal efficiency of NOx, such as: the height of liquid layer, Ca(ClO)2 concentration, reaction temperature, initial pH value, O2 percent, SO2 concentration, and additives were investigated, respectively. Finally, simultaneous removal of SO2 and NOx under the optimized conditions were investigated, SO2 removal efficiency of 100% and NOx removal efficiency of 85.9% were achieved. The analysis of reaction products indicated that the main anions in the liquid phase were SO42‐ and NO3−. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1586–1595, 2015

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“…Thermodynamic calculation results were shown in Table The results stated that

Δ_{normalr} H_{m}^{Θ}

Section: Reaction Mechanismmentioning

confidence: 91%

Wet removal of sulfur dioxide and nitrogen oxides from simulated flue gas by ca(ClO)₂ solution

Zhou

Fan

et al. 2015

Env Prog and Sustain Energy

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“…Os corantes da classe antraquinona possuem elevada estabilidade devido à presença de grupos aromáticos. 44 Aliado a isso, a complexidade e a estabilidade química dos corantes estudados também contribuem para os valores de remoção de COT baixos e a energia elétrica consumida para sua mineralização. Faouzi et al, 45 usando anodo de Si/ DDB, mostraram que a eletrooxidação de dois corantes distintos pode implicar a remoção concomitante da demanda química de oxigênio (DQO) e COT, dependendo do peso molecular e da estrutura quími-ca dos corantes.…”

Section: Figura 3 Decaimento Relativo (A) Absorbância (B) áRea Cromaunclassified

Electrochemical Oxidation of Reactive Black 5 and Blue 19 Dyes Using a Non Commercial Boron-Doped Diamond Electrode

Vasconcelos¹,

Souza²,

Guaraldo³

et al. 2016

Química Nova

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respectively azo and anthraquinone textile dyes, by electrochemical oxidation using a non commercial boron doped diamond electrode supported on titanium metallic with a relation between B and C equal to 15,000 ppm. Pt was used as counter electrode and Ag/AgCl (sat) was the reference electrode. The variables investigated to optimize the degradation were support electrolyte concentration (0.05, 0.1 and 0.2 mol L -1 of K 2 SO 4 ), temperature (25, 35 and 45 ºC) and pH (2.5 and 10) by applying a current density of 75 mA cm -2. Total decolorization was observed in all electrochemical conditions studied. The highest rates of mineralization and chromatographic area removal were attained at high support electrolyte concentration due to the increase of conductivity, which caused more generation of hydroxyl radicals. RP5 was degraded at lower electrolysis time than RA19 with smaller requirement of electric charge. The mineralization rate increased in acid medium and at higher temperature since the increase in temperature favors the generation reactions of persulfate. These conditions led to the highest levels of current efficiencies and lower energy consumed.Keywords: boron-doped diamond electrode; Reactive Black 5; Reactive Blue 19; decolorization; hydroxyl radical; persulfate. INTRODUÇÃOOs corantes sintéticos são compostos de extrema importância para o setor industrial, principalmente, para as indústrias têxteis que são responsáveis pela enorme descarga de efluentes contendo corantes e outros resíduos indesejáveis, sendo potenciais poluidoras ambientais. 1-4Os efluentes têxteis apresentam alta demanda química e biológica de oxigênio, elevada salinidade e intensa coloração devido à presença de corantes, os quais são fotolítica e quimicamente estáveis, podem exibir toxicidade aguda e serem carcinogênicos e/ou mutagênicos. Sendo assim, quando os corantes são descartados incorretamente no meio ambiente podem ocasionar problemas ambientais e, sobretudo, ser nocivos à saúde humana e dos animais. 5,6 Os corantes reativos, por exemplo, são solúveis em água, aniôni-cos e ligam-se às fibras do tecido por meio de ligações covalentes, pela reação de adição nucleofílica do grupo vinilsulfona ao grupo hidroxila da celulose, o que confere ao tecido tingido alta estabilidade da cor adquirida. 7,8 Entretanto, esses corantes apresentam baixa eficiência de fixação às fibras devido à competitividade de duas reações, a primeira sendo do grupo reativo vinilsulfona com as fibras e a segunda a reação de hidrólise do grupo vinilsulfona produzindo o 2-hidroxietilsulfona, que não se fixa a fibra e é perdido no efluente.9 As Figuras 1a e 1b ilustram as estruturas moleculares de dois corantes reativos, o Reativo Preto 5 (RP5) e o Azul (RA19), respectivamente, que apresentam como grupo reativo a sulfatoetilsulfonila.O corante RP5, com grupo cromóforo azo, é um dos corantes mais utilizados no tingimento de algodão, no qual emprega-se, aproximadamente, 40 g do corante dissolvidos em 70 a 150 L de água para cada kg de algodão tingido. 10 No entanto, ...

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“…Although azo dyes represent approximately 70% of all dyes used by the textile industry, anthraquinone dyes constitute the second largest class of textile dyes after azo dyes . These dyes can be hardly degraded in the environment because of their resistance to the oxidizing agents, light, and water . Recently, the decolorization of anthraquinone dyes using chloroperoxidase and horseradish peroxidase (HRP) as biocatalysts has attracted much attention because biodegradation is very effective and it is an important step for the complete removal of the pollutant .…”

Section: Introductionmentioning

confidence: 99%

Immobilization of horseradish peroxidase on ZnO nanowires/macroporous SiO₂ composites for the complete decolorization of anthraquinone dyes

Sun

Jin

Jiang

et al. 2017

Biotech and App Biochem

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A zinc oxide (ZnO) nanowires/macroporous silicon dioxide composite was used as support to immobilize horseradish peroxidase (HRP) simply by in situ cross-linking method. As cross-linker was adsorbed on the surface of ZnO nanowires, the cross-linked HRP was quite different from the traditional cross-linking enzyme aggregates on both structure and catalytic performance. Among three epoxy compounds, diethylene glycol diglycidyl ether (DDE) was the best cross-linker, with which the loading amount of HRP with pI of 5.3 reached as high as 118.1 mg/g and specific activity was up to 14.9 U/mg-support. The mass loss of HRP cross-linked with DDE was negligible during 50-H leaching at 4 °C, and the thermal stability of the immobilized HRP was also quite good. The catalytic performance of immobilized HRP to decolorize anthraquinone dye was explored by using Reactive Blue 19 (RB 19) and Acid Violet 109 (AV 109) as model substrates. The results indicated that the immobilized HRP exhibited high decolorization efficiency and good reusability. The decolorization efficiency reached 94.3% and 95.9% for AV 109 and RB 19 within the first 30 Min, respectively. A complete decolorization of these two dyes has been realized within 2-3 H by using this new biocatalysis system.

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Decolorization of antraquinone dye Reactive Blue 181 solution by UV/H2O2 process

Cited by 107 publications

References 35 publications

Wet removal of sulfur dioxide and nitrogen oxides from simulated flue gas by ca(ClO)₂ solution

Wet removal of sulfur dioxide and nitrogen oxides from simulated flue gas by ca(ClO)₂ solution

Electrochemical Oxidation of Reactive Black 5 and Blue 19 Dyes Using a Non Commercial Boron-Doped Diamond Electrode

Immobilization of horseradish peroxidase on ZnO nanowires/macroporous SiO₂ composites for the complete decolorization of anthraquinone dyes

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Decolorization of antraquinone dye Reactive Blue 181 solution by UV/H2O2 process

Cited by 107 publications

References 35 publications

Wet removal of sulfur dioxide and nitrogen oxides from simulated flue gas by ca(ClO)2 solution

Wet removal of sulfur dioxide and nitrogen oxides from simulated flue gas by ca(ClO)2 solution

Electrochemical Oxidation of Reactive Black 5 and Blue 19 Dyes Using a Non Commercial Boron-Doped Diamond Electrode

Immobilization of horseradish peroxidase on ZnO nanowires/macroporous SiO2 composites for the complete decolorization of anthraquinone dyes

Contact Info

Product

Resources

About

Wet removal of sulfur dioxide and nitrogen oxides from simulated flue gas by ca(ClO)₂ solution

Wet removal of sulfur dioxide and nitrogen oxides from simulated flue gas by ca(ClO)₂ solution

Immobilization of horseradish peroxidase on ZnO nanowires/macroporous SiO₂ composites for the complete decolorization of anthraquinone dyes