Electro-oxidative decolorization and treatment of model wastewater containing Acid Blue 80 on boron doped diamond and platinum anodes

Kuchtová, Gabriela; Chýlková, Jaromíra; Váňa, Jiří; Vojs, Marián; Dušek, Libor

doi:10.1016/j.jelechem.2020.114036

Cited by 28 publications

(5 citation statements)

References 34 publications

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“…3.1.). These results show that the BDD electrode is not pH sensitive in this case and it shows its superiority over other processes that require pH adjustment [35,39]. It was observed that the TOC amount could be reduced to a maximum of 5025 mg/L at pH 5.0 which is very close to the original pH value of wastewater.…”

Section: Initial Ph Effectmentioning

confidence: 55%

“…One of the most important parameters in EO is current. In the studies conducted in the past years, it has been observed that the current has a direct effect on the removal of COD and TOC [39][40][41]43]. To examine the effect of current, it was decided to conduct experiments at 3.0A (500 A/m 2 ), 4.5A (750 A/m 2 ), and 6.0A (1000 A/m 2 ) by adjusting the temperature to 25 o C. The amount of TOC was reduced up to 4782 mg/L in 3.0 A, up to 4610 mg/L in 4.5 A, and up to 3867 mg/L in 6.0 A.…”

Section: Current Effectmentioning

confidence: 99%

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Treatment of Embroidery Wastewater Containing Poly (Vinyl Alcohol) by Electrooxidation Process

Gengeç

Bozbaş

Ayhan

2022

Preprint

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Due to its high poly(vinyl) alcohol (PVA) concentration, Embroidery industry wastewater is very resistant to biodegradation and classical methods such as coagulation, and adsorption. On the other hand, high chemical consumption is required in chemical oxidation processes. In this study, wastewater containing PVA was treated by an electrooxidation process with Boron Doped Diamond (BDD) electrodes for the first time in literature. The effects of pH (2.0–8.0), temperature (25–45 ̊C), current (3.0–6.0 A), electrolyte concentration (NaCl of 3.0–8.0 g/L), and oxidation time (0-600 min) were determined. The total organic carbon (TOC) concentration in the wastewater was decreased from 6584 mg/L to 159.10 mg/L (97.6%) at pH 5.01, 6.0 A, 3.0 g/L of electrolyte concentration, 25°C, and 10 hours. In addition, the removal mechanism of the process was elucidated by using HPSEC, FT-IR, UV-VIS, and Fluorescence Spectroscopy methods. Characterization studies showed that the high amount of PVA in the embroidery process wastewater is degraded and the halogens have attached to the part of the polymer where the structure has deteriorated through oxidation. Raw wastewater contains a wide range of pollutants (103-1010 Da). The results showed that the EO process is not a pollutant-selective technique in terms of molecular weight and it shows its superiority over other processes.

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Section: Initial Ph Effectmentioning

confidence: 55%

Section: Current Effectmentioning

confidence: 99%

Treatment of Embroidery Wastewater Containing Poly (Vinyl Alcohol) by Electrooxidation Process

Gengeç

Bozbaş

Ayhan

2022

Preprint

View full text Add to dashboard Cite

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“…The material of the anode can influence the electrochemical mechanism and the produced material (Särkkä et al 2015). Lead and lead oxide (Awad & Abo Galwa 2005), boron-doped diamond (Koparal et al 2007;Zhu et al 2018;Kuchtová et al 2020), dimensionally stable anode (DSA) (Tavares et al 2012;Zhang et al 2012), and activated carbon cloth (ACC) (Cukierman 2013) electrodes were used as a base for the electrode in the EO process. Graphite electrodes had the attention of the researchers because of their low cost, low resistivity, chemical inertness and good conductivity (Kariyajjanavar et al 2013a(Kariyajjanavar et al , 2013b.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the electrochemical oxidation of textile wastewater by graphite electrodes by response surface methodology and artificial neural network

Saleh

Yildirim

Işık

et al. 2021

Water Science and Technology

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In this study, electrochemical oxidation of combed fabric dyeing wastewater was investigated using graphite electrodes. The response surface methodology (RSM) was used to design the experiments via the central composite design (CCD). The planned experiments were done to track color changes and chemical oxygen demand (COD) removal. The experimental results were used to develop optimization models using RSM and the artificial neural network (ANN) and they were compared. The developed models by the two methods were in good agreement with the experimental results. The optimum conditions were found at 150 A/m2, pH 5, and 120 min. The removal efficiencies for color and COD reached 96.6% and 77.69%, respectively. The operating cost at the optimum conditions was also estimated. The energy and the cost of 1 m3 of wastewater required 34.9 kWh and 2.58 US$, respectively. The graphite electrodes can be successfully utilized for treatment of combed fabric dyeing wastewater with reasonable cost.

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“…This is because the BDD electrode has incomparable advantages over other electrodes (graphite, Pt, and DSA), such as wide electrochemical window, corrosion resistance, low adsorption, and it can produce a large number of •OH that indirectly oxidate azo dyes instead of releasing oxygen (reactions (1)-( 3)) (Wang et al, 2000;Panakoulias et al, 2010;Wachter et al, 2015;Soni et al, 2017). Previous research has shown that the BDD electrode's influence on the •OH of an electrocatalytic system depends on the operating parameters, such as current density, supporting electrolyte and concentration, solution pH, temperature, and pollutant concentration (Kuchtova et al, 2020). However, to improve the degradation efficiency of single electrochemical oxidation (EO), high current density and extended electrolysis time are usually adopted, which limiting its promotion and application in the industry, as shown in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Improved electrochemical oxidative degradation of Reactive Red 24 dye by BDD anodes coupled with nitrate: operating parameters, kinetics, and degradation pathways

Tang¹,

He²,

Guo³

et al. 2021

Preprint

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The electrochemical oxidation (EO) process coupled with BDD anode and nitrate was used to improve Reactive Red 24 (RR24) removal efficiency in wastewater treatment. The effects of operating parameters on the decolorization efficiency of RR24 were discussed, and the optimal operating parameters were obtained as follows: 45 mA cm− 2, 100 mM SO42−, 7 mM NO3−, 60°C, pH 5.88, and 100 mg L− 1 RR24 initial concentration. The energy consumption for 100% decolorization within 15 min is 0.92 kWh m− 3, and the total organic carbon (TOC) reaches 51.35% within 90 min. Through the effect of quenchers on RR24 decolorization efficiency, various active species in the EO process were studied. It was found that •OH was closely related to the decolorization degradation of RR24, reaching a contribution rate of 99.47%. Finally, we propose the degradation pathways of RR24 by UV-Vis spectrum and LC-MS test. In summary, the proposed treatment process could be applied to treat RR24 dyes as an efficient method.

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Electro-oxidative decolorization and treatment of model wastewater containing Acid Blue 80 on boron doped diamond and platinum anodes

Cited by 28 publications

References 34 publications

Treatment of Embroidery Wastewater Containing Poly (Vinyl Alcohol) by Electrooxidation Process

Treatment of Embroidery Wastewater Containing Poly (Vinyl Alcohol) by Electrooxidation Process

Optimization of the electrochemical oxidation of textile wastewater by graphite electrodes by response surface methodology and artificial neural network

Improved electrochemical oxidative degradation of Reactive Red 24 dye by BDD anodes coupled with nitrate: operating parameters, kinetics, and degradation pathways

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