Electrochemical treatment of Remazol Brilliant Blue on a boron-doped diamond electrode

Montanaro, Daniele; Petrucci, Elisabetta

doi:10.1016/j.cej.2009.06.031

Cited by 59 publications

(33 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Particularly, chloride has been considered for indirect oxidation since chloride salts are usually found in wastewaters (Oliveira et al, 2001, Palmas et al, 2007. Moreover, the role of active chlorine has been intensively investigated for dye degradation (Ruotolo et al, 2007;Panizza et al, 2007;Montanaro and Petrucci, 2009). However, an important drawback of electrolysis in chloride media may be the formation of chloroderivatives of the organic compound (Polcaro et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Britto-Costa

Ruotolo

2012

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-Industrial wastewater containing non-biodegradable organic pollutants consists of highly toxic effluents whose treatment is necessary due to environmental and economical restrictions. In order to treat these effluents, an electrochemical process using a dimensionally stable anode (DSA ® ) and boron-doped diamond (BDD) electrode was studied. The performance of these electrodes for COD removal from aqueous phenol solution was evaluated in the absence and presence of different chloride concentrations. The results showed that DSA ® could be successfully used to remove COD when high chloride concentration (3035 mg L -1 Cl -) and mild current density are employed (50 mA cm -2 ). On the other hand, the presence of chloride did not have the same significant effect on the COD depletion rate using BDD; however, under mild conditions (50 mA cm -2 , 0.190 m s -1 ), the addition of 607 mg L -1 Cl -improved the COD removal by approximately 52% after 8 hours of electrolysis. The effect of current density (i) and flow velocity (v) were also studied, and it was verified that they have an important role on the process performance, especially when DSA ® is used.

show abstract

Section: Introductionmentioning

confidence: 99%

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Britto-Costa

Ruotolo

2012

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Moreover, an increase in temperature can shift the equilibrium of active chlorine species toward hypochlorite, with a further reduction in oxidizing power. Nonetheless, controversial data can be found in the literature suggesting that the presence or the absence (Montanaro and Petrucci 2009;Aquino et al 2013) of an effect is strictly related to the dye chemical structure.…”

Section: Resultsmentioning

confidence: 99%

“…For each factor, natural values corresponding to the coded levels of -1, 0 and ?1 were selected to cover a range of values of practical interest and on the basis of the results of preliminary experiments conducted to assess their individual effect on the decolorization efficiency. In particular, chloride concentrations were evinced by a previous work (Montanaro and Petrucci 2009), while sulfate values lie within the range usually adopted for a supporting electrolyte. The electrolysis time was kept as low as possible (2-8 min) to avoid masking the effects of the other factors.…”

Section: Experimental Designmentioning

confidence: 99%

“…When azo dyes are treated by anodic oxidation on BDD, decolorization and mineralization occur simultaneously due to the non-selective reaction of the electrogenerated ÁOH radicals that can attack either the N=N double bond or the aromatic ring. In the presence of chlorides, BDD produces also a mixture of oxidants known as active chlorine with high selectivity toward the chromophore group, thus accelerating the color removal rate (Montanaro and Petrucci 2009). In this case, complete decolorization is achieved before mineralization occurs to a significant extent.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous studies on the removal of azo dyes with BDD electrodes, we found that the removal efficiency was affected by a variety of factors including, among others, dye, chloride and supporting electrolyte concentrations, current density, pH, temperature, stirring rate and time (Montanaro and Petrucci 2009;Petrucci et al 2015a, b). This electrochemical treatment therefore represents an ideal test bench for the experimental validation of methods based on DSD strategies.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of a novel definitive screening design to decolorization of an azo dye on boron-doped diamond electrodes

Fidaleo

Lavecchia

Petrucci

et al. 2016

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

The electrochemical decolorization of the Reactive Violet 5 azo dye on a boron-doped diamond anode was used as a model process to test a novel definitive screening design (DSD). This method allows a dramatic reduction in the number of experiments needed to investigate those systems characterized by a large number of variables. In this study, the effect of nine quantitative parameters was investigated: initial dye concentration (60-120 mg L -1 ), current density (100-500 A m -2 ), NaCl concentration (5-20 mM), Na 2 SO 4 concentration (35-65 mM), pH (3-11), temperature (20-45°C), interelectrode distance (0.5-3.5 cm), stirring rate (250-750 rpm) and electrolysis time (2-8 min). Analysis of DSD data showed that four out of the nine factors (initial dye concentration, current density, pH and electrolysis time) were statistically significant. These factors were retained for process characterization using a subsequent central composite design. Overall, the number of experiments was reduced from over 500 to only 41, thus confirming the validity of the proposed approach as a timesaving and efficient method.

show abstract

Electrochemical Degradation of Reactive Blue 19 Dye by Combining Boron‐Doped Diamond and Reticulated Vitreous Carbon Electrodes

et al. 2019

View full text Add to dashboard Cite

Reactive Blue 19 (RB‐19) dye has a low fixation efficiency, a long half‐life and high toxicity. It is easily loss during the cleaning of textiles and can remain in the environment for a long time, causing serious environmental problems if not removed. This study reports the degradation of RB‐19 by: 1) direct electrochemical degradation with boron‐doped diamond (BDD) electrodes and 2) combined processes using BDD and reticulated vitreous carbon (RVC) electrodes that generate H2O2. The direct degradation uses different current densities and concentrations. High currents densities, longer electrolysis times and low volumetric flow rates favour RB‐19 degradation, removing total colour and 100 % TOC after 5 and 60 min, respectively. At a current density of 41 mA cm−2 and a volumetric flow rate of 20 dm3 h−1, the energy consumption to degrade 20 mg dm−3 of RB‐19 was 279 kWh kg−1. The TOC removal of RB‐19 dye combining BDD and RVC at a current density of 41 mA cm−2 was below 72 % after 90 min and the energy consumption increased to 612 kWh kg−1. The higher energy consumption observed during the combined process suggests that the direct degradation process at low volumetric flow rates is more efficient than the combined process.

show abstract

Electrochemical treatment of Remazol Brilliant Blue on a boron-doped diamond electrode

Cited by 59 publications

References 40 publications

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Application of a novel definitive screening design to decolorization of an azo dye on boron-doped diamond electrodes

Electrochemical Degradation of Reactive Blue 19 Dye by Combining Boron‐Doped Diamond and Reticulated Vitreous Carbon Electrodes

Contact Info

Product

Resources

About