Electrochemical degradation of industrial textile dye disperse yellow 3: Role of electrocatalytic material and experimental conditions on the catalytic production of oxidants and oxidation pathway

Salazar, Ricardo; Ureta-Zañartu, María Soledad; González-Vargas, Camilo; Brito, Christiane do Nascimento; Martínez‐Huitle, Carlos A.

doi:10.1016/j.chemosphere.2017.12.092

Cited by 74 publications

(22 citation statements)

References 33 publications

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“…In this experiment, as the pH value increases from acidic to alkaline the percentage of color removal decreases, which represents an inversely proportional relationship graph pattern. Those achieved results are similar to previous studies, which indicate high accuracy of this experiment [22]. Those results can be explained as the dye solution is at acidic condition such as pH 3, the electrostatic attraction increases as the adsorbent with positive charge surface interact with negatively charged dye solution.…”

Section: Batch Studiessupporting

confidence: 90%

Adsorption of azo and anthraquinone dye by using watermelon peel powder and corn peel powder: equilibrium and kinetic studies

2019

Biointerface Res Appl Chem

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Clean water is an essential element for the survival of humans and nature. However, the tremendous growth in industrialization has degraded the water quality by introducing pollutants such as dyes into the main water bodies such as rivers. In this research, the locally collected agricultural wastes such as watermelon peel (Citrullus lanatus) and corn peel (Zea Mays) were tested on two types of synthetics dyes such Remazol Brilliant Violet 5R (RBV5) and Remazol Brilliant Blue R (RBBR). From the screening test, the watermelon peel achieved the highest color removal percentage with 44.8% and followed by corn's peel with 18.89%. Both adsorbents were selected for the batch adsorption test by varying the parameters. Based on the results achieved from the batch adsorption test, the optimum removal of dye particles was achieved at the lowest concentration of dye solutions. The optimum pH value to achieve a high percentage of color removal is at pH3, which is acidic. In this case, the 3 g of adsorbent dosage achieved the highest percentage of color removal compared to 5 g. This could due to insufficient contact time. In addition, the chemical and physical characteristics of the adsorbents were analyzed using FESEM and FTIR respectively. By analyzing the surface texture and functional group, differences in the adsorbents before and after adsorption were noticed. Besides that, based on the obtained R 2 values from the linear plotting, the Temkin isotherm model and pseudo-second-order kinetic model fitted well compared to other isotherm and kinetic models. In conclusion, the watermelon peel and corn peel are capable of removing dye particles in the industrial effluent under selective conditions with low cost while being environmentally friendly.

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Section: Batch Studiessupporting

confidence: 90%

Adsorption of azo and anthraquinone dye by using watermelon peel powder and corn peel powder: equilibrium and kinetic studies

2019

Biointerface Res Appl Chem

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“…Electrochemical advanced oxidation processes (EAOPs) as an alternative treatment technique for organic-contaminated wastewater has been extensively developed and studied in the last two decades due to their versatility, environmental compatibility, high energy efficiency and amenability to automation [1][2][3][4]. The oxidative degradation and efficient removal of organic pollutant in EAOPs is achieved by means of in-situ generated hydroxyl radical ( % OH), which is a very reactive nonselective reagent and strong oxidant (second strongest oxidant known after fluorine) [5][6][7][8]. Among EAOPs, anodic oxidation (AO) and electro-Fenton (EF) processes in which % OH are generated either at the surface of the high-oxygen overpotential anode (M) via water oxidation (Eq.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of plasma elaborated sub-stoichiometric titanium oxide (Ti4O7) ceramic electrode for advanced electrochemical degradation of paracetamol in different electrolyte media

Ganiyu

Oturan

Raffy

et al. 2019

Separation and Purification Technology

117

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This paper investigates the behavior of conductive Ti 4 O 7 ceramic anode in different electrolytes during the degradation of the anti-inflammatory drug paracetamol (PCM) by advanced electrochemical oxidation processes mainly anodic oxidation with generation of H 2 O 2 (AO-H 2 O 2) and electro-Fenton (EF). Regardless of the medium, better degradation and mineralization efficiency was always observed with EF compared to AO-H 2 O 2. The degradation of PCM was carried out by hydroxyl radical (% OH) produced on the anode surface from water oxidation and mediated oxidation in the solution from oxidant species generated at the anode such as sulfate radicals and active chlorine species depending on the supporting electrolytes used, as well as % OH generated homogeneously in the solution by electrochemically assisted Fenton's reaction. Faster degradation was observed in Cl − compared to other media, but the solution was poorly mineralized. Highest total organic (TOC) removal efficiency with excellent degradation rate was attained in SO 4 2− with either process, thus remain the best medium for advanced electrochemical wastewater treatment. Comparative studies with dimensional stable anode (DSA) and boron-doped diamond anode (BDD) showed similar trend of degradation and TOC removal efficiency with DSA anode achieving low mineralization power compared to Ti 4 O 7 anode, whereas BDD showed slightly better efficiency than Ti 4 O 7 in all electrolytes studied. The analysis of concentration of generated active chlorine species, especially ClO − , during AO-H 2 O 2 decreased in the order: DSA > Ti 4 O 7 > BDD. Therefore, the Ti 4 O 7 electrode was found to be a promising anode material for an efficient treatment of PCM in SO 4 2− , NO 3 − and ClO 4 − media but less effective in Cl − medium.

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“…Depending on the nature of the anode, the AO process can oxide organic pollutants dissolved in water in two ways: (i) a direct oxidation at the anode surface promotes partial conversion on oxidized or biodegradable compounds; ii) an indirect oxidation converts pollutants into CO 2 and H 2 O by means of strong oxidant species produced on the anode surface, such as . OH, persulfate and ozone, among others . In the presence of chlorides, the oxidation of organic compounds is mainly caused by the occurrence of active chlorine species like hypochlorous acid and hypochlorite, produced by the following reactions (Equations (2), (3) and (4)):<…”

Section: Introductionmentioning

confidence: 99%

“…The most common DSA‐type anode in wastewater treatment is Ti/Ru 0.3 Ti 0.7 O 2 (DSA‐Cl 2 ) due to its high catalytic activity, high stability to anodic corrosion and mechanical steadiness, as well as high electrocatalytic activity for chlorine evolution as a consequence of the surface redox reactions taking place at transition metal ions that act as active sites for the absorption of chlorine atoms . Several studies have addressed the effects of dye concentration, pH, supporting electrolyte, electrode material and current density on dye removal efficiency,− but limited works analyze intermediates, by‐products and dye degradation mechanisms …”

Section: Introductionmentioning

confidence: 99%

Decolorization and Degradation of a Mixture of Industrial Azo Dyes by Anodic Oxidation Using a Ti/Ru_0.3Ti_0.7O₂ (DSA‐Cl₂) Electrode.

et al. 2019

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The electrochemical treatment of wastewaters from the textile industry is a promising alternative for the elimination of organic pollutants. This study approach the decolorization and chemical oxygen demand (COD) removal from synthetic water (0.91 mM Acid Yellow 25 dye ‐ and ‐ 0.42 mM Acid Blue 29 dye), by anodic oxidation (AO) in batch mode using a Ti/Ru0.3Ti0.7O2 (DSA‐Cl2) electrode as anode and an AISI 304 stainless steel plate as cathode. The influence of pH (3, 7 and 10), type of supporting electrolyte (50 mM Na2SO4, 50 mM NaCl and 100 mM NaCl) and applied current density (10 < j < 80 mA cm–2) on COD removal and mineralization current efficiency was analyzed. The best AO test in terms of energy consumption was performed at pH 7, 50 mM NaCl and j=30 mA cm–2, obtaining a complete decolorization and COD removal. These operating parameters have an energy consumption between 0.41 and 0.82 kWh m–3. High performance liquid chromatography (HPLC‐MS/MS) analyses indicated the presence of several organic intermediates and carboxylic acids.

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Electrochemical degradation of industrial textile dye disperse yellow 3: Role of electrocatalytic material and experimental conditions on the catalytic production of oxidants and oxidation pathway

Cited by 74 publications

References 33 publications

Adsorption of azo and anthraquinone dye by using watermelon peel powder and corn peel powder: equilibrium and kinetic studies

Adsorption of azo and anthraquinone dye by using watermelon peel powder and corn peel powder: equilibrium and kinetic studies

Efficiency of plasma elaborated sub-stoichiometric titanium oxide (Ti4O7) ceramic electrode for advanced electrochemical degradation of paracetamol in different electrolyte media

Decolorization and Degradation of a Mixture of Industrial Azo Dyes by Anodic Oxidation Using a Ti/Ru_0.3Ti_0.7O₂ (DSA‐Cl₂) Electrode.

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Electrochemical degradation of industrial textile dye disperse yellow 3: Role of electrocatalytic material and experimental conditions on the catalytic production of oxidants and oxidation pathway

Cited by 74 publications

References 33 publications

Adsorption of azo and anthraquinone dye by using watermelon peel powder and corn peel powder: equilibrium and kinetic studies

Adsorption of azo and anthraquinone dye by using watermelon peel powder and corn peel powder: equilibrium and kinetic studies

Efficiency of plasma elaborated sub-stoichiometric titanium oxide (Ti4O7) ceramic electrode for advanced electrochemical degradation of paracetamol in different electrolyte media

Decolorization and Degradation of a Mixture of Industrial Azo Dyes by Anodic Oxidation Using a Ti/Ru0.3Ti0.7O2 (DSA‐Cl2) Electrode.

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Decolorization and Degradation of a Mixture of Industrial Azo Dyes by Anodic Oxidation Using a Ti/Ru_0.3Ti_0.7O₂ (DSA‐Cl₂) Electrode.