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Hattori, S.; Doi, Masao; Takahashi, Eietsu; Kurosu, Takeshi; Nara, Miyuki; Nakamatsu, Shuji; Nishiki, Yoshinori; Furuta, Tsuneto; Iida, Masamori

doi:10.1023/a:1022945714152

Cited by 50 publications

(20 citation statements)

References 25 publications

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“…This behaviour confirms that dye degradation is via its reaction with electrogenerated ·OH radicals on BDD surface [19,20,27,28]. On the other hand, as shown in Fig.…”

Section: Hazen Coloursupporting

confidence: 81%

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Electrochemical Degradation of Remazol Red BR and Novacron Blue C-D Dyes Using Diamond Electrode

et al. 2011

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In this paper, the treatment of dye solutions containing Remazol Red BR (RRB) and Novacron Blue C-D (NB) by anodic oxidation using boron-doped diamond (BDD) anodes has been investigated. Galvanostatic electrolyses of RRB and NB solutions have led to the complete decolourisation and chemical oxygen demand (COD) removal at different operating conditions (current density, pH and temperature). Energy requirements for removing colour during galvanostatic electrolyses of RRB and NB synthetic solutions depend mainly on operating conditions; for example for RRB, it passes from 3.30 kWh m −3 at 20 mA cm −2 to 4.28 kWh m −3 at 60 mA cm −2 (pH=1); 17.25 kWh m −3 at 20 mA cm −2 to 28.87 kWh m −3 at 60 mA cm −2 (pH=4.5); 13.50 kWh m −3 at 20 mA cm −2 to 37.80 kWh m −3 at 60 mA cm −2 (pH=8). Additionally, colour and COD removal rates were favoured when an increase on the temperature was attained, decreasing the energy consumption requirements. According to the experimental results obtained, the electrochemical oxidation process is suitable for depuration wastewaters containing these textile dyes, due to the electrocatalytic properties of BDD anode.

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“…This behaviour confirms that dye degradation is via its reaction with electrogenerated ·OH radicals on BDD surface [19,20,27,28]. On the other hand, as shown in Fig.…”

Section: Hazen Coloursupporting

confidence: 81%

“…2, 3 and 4). This behaviour indicates dye degradation through its reaction with electrogenerated ·OH radicals on BDD surface [19,20,27,28]. In contrast to the complete solutions decolourization, it seems that the decolourisation time mainly depends on the applied current density and pH conditions.…”

Section: Colour Removalmentioning

confidence: 99%

Electrochemical Degradation of Remazol Red BR and Novacron Blue C-D Dyes Using Diamond Electrode

et al. 2011

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“…36 For that, they hypothesized a possible participation of dissolved oxygen. Therefore, they studied the electrochemical behavior of several aqueous solutions containing dissolved oxygen or not (aerated, 18 O 2 decrease, confirming that oxygen dissolved in the solution is involved in AA oxidation. In this way, Comninellis, Baltruschat, and colleagues proposed an original and additional mechanism for the electrochemically induced oxidation of organic compounds via molecular oxygen dissolved in aerated solutions on BDD electrodes, as shown in Figure 2.…”

Section: Mineralization Of Organics By Molecular Oxygenmentioning

confidence: 92%

“…45 Helmut Baltruschat (Universität Bonn, Germany), along with Christos Comninellis (Ecole Polytechnique Fédérale de Lausanne, Switzerland) and colleagues showed that organics mineralization on BDD electrodes does not only involve hydroxyl radicals but also molecular oxygen present in air/oxygen-saturated aqueous organic solutions. The direct evidence for this process was found during EO of an acetic acid (AA) solution saturated with isotopically labelled 18 O. The underlying motivation was the understanding why ICE values on BDD were sometimes higher than 100%, during organics EO (Figure 1).…”

Section: Mineralization Of Organics By Molecular Oxygenmentioning

confidence: 99%

Electrocatalysis in wastewater treatment: recent mechanism advances

Martínez‐Huitle¹,

Andrade²

2011

Quím. Nova

114

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Recebido em 23/9/10; aceito em 4/12/10; publicado na web em 25/3/11Over 50 years, several scientists and industries have developed new alternatives for wastewater treatment and remediation. Recently, electrochemical technology has been largely developed mainly because of its versatility and environmental compatibility. Scientific contributions about role of the electrode material have allowed determining that the influence of material in the selectivity is an important parameter. However, to interpret this behavior, comprehensive physical chemistry models for organics destruction, related to electrochemical phenomena and material surfaces, were proposed in the last decades. So, this paper presents a critical and comprehensive review about the principles and recent mechanism advances in electrocatalysis for wastewater treatment.

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“…They demonstrated the feasibility of Amaranth oxidation because its degradation by reduction is low. Also, Hattori et al worked on the electrochemical treatment in the degradation of Amaranth; they found that Amaranth was easier to be oxidized than reduced [14]. Karkmaz et al investigated the Amaranth degradation by advanced oxidation process, using activated TiO 2 powder in a photoreactor, they determined the kinetics of Amaranth degradation in this system [15].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and Photoelectrochemical Decoloration of Amaranth Dye Azo Using Composited Dimensional Stable Anodes

Salazar‐Gastélum¹,

Reynoso‐Soto²,

Lin³

et al. 2013

JEP

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In this paper we report the results of our experimental work conducted to decoloration of a well-known highly toxic Amaranth dye by electrochemical and photoelectrochemical methods. Used throughout this investigation were two different Dimensional Stable Anode (DSA) electrodes, namely, IrO 2 -Ru 2 O-SnO 2 -TiO 2 /Ti and Ru 2 O-SnO 2 -TiO 2 /Ti. The experimental results show that IrO 2 -Ru 2 O-SnO 2 -TiO 2 /Ti electrode has higher performance on amaranth decoloration than Ru 2 O-SnO 2 -TiO 2 /Ti electrode, but with the disadvantage of higher energy consumption. For higher degradation of Amaranth dye with both DSA electrodes, the process was carried out via photoelectrochemical method. Our experimental results clearly shown the decrease in absorbance of all UV-Vis peaks due to the mineralization of the azo dye; also, it was noteworthy photoelectrochemical process consumes less energy under the same experimental conditions than electrochemical process. The IrO 2 -Ru 2 O-SnO 2 -TiO 2 /Ti electrode reaches a higher degradation degree of Amaranth solutions than Ru 2 O-SnO 2 -TiO 2 /Ti electrode using a photoelectrochemical technique.

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Cited by 50 publications

References 25 publications

Electrochemical Degradation of Remazol Red BR and Novacron Blue C-D Dyes Using Diamond Electrode

Electrochemical Degradation of Remazol Red BR and Novacron Blue C-D Dyes Using Diamond Electrode

Electrocatalysis in wastewater treatment: recent mechanism advances

Electrochemical and Photoelectrochemical Decoloration of Amaranth Dye Azo Using Composited Dimensional Stable Anodes

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