Degradation of mixtures of phenols using boron doped diamond electrodes for wastewater treatment

Morão, A.; Lopes, Ana; Amorim, Maria João; Gonçalves, I.C.

doi:10.1016/j.electacta.2003.11.020

Cited by 76 publications

(41 citation statements)

References 14 publications

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“…31,32 In addition, BDD electrodes have even been used to treat wastewater. [33][34][35][36][37][38] However, the BDD-electrode-based detection methods reported to date have not used a sufficiently wide electrical potential window, i.e., methods involving the application of high potentials have not yet been reported. Herein, we report the use of a BDD electrode with the application of high potentials (2 V vs. Ag/AgCl), coupled with FIA and HPLC, to detect sugars, such as saccharide and oligosaccharide in sugar-related compounds.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of Sugar-related Compounds Using Boron-doped Diamond Electrodes

Hayashi

Sakurada²,

Honda

et al. 2012

ANAL. SCI.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of Sugar-related Compounds Using Boron-doped Diamond Electrodes

Hayashi

Sakurada²,

Honda

et al. 2012

ANAL. SCI.

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“…Organic pollutants on BDD electrodes can be oxidized directly (by electron transfer from surface to compound) and indirectly (by oxidizing entities generated on the electrode surface by electrolysis of water) [2]. It has also been demonstrated that other biorefractory compounds such as pesticides, pharmaceuticals and dyes can be completely mineralized with high current efficiency [13][14][15]. Electrochemical study was performed to achieve and optimize the parameters of this process.…”

Section: Introductionmentioning

confidence: 99%

Application of BDD thin film electrode for electrochemical decomposition of heterogeneous aromatic compounds

et al. 2012

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Abstract:The aim of the presented study is to investigate the applicability of electrochemical oxidation of aromatic compounds containing heteroatoms, e.g. waste from production of pesticides or pharmaceutics, at a borondoped diamond (BDD) electrode. The BDD electrodes were synthesized by microwave plasma enhanced chemical vapour deposition (MW PE CVD). Investigation of the electrode surface by optical microscopy and scanning electron microscopy (SEM) confirmed that the synthesized layer was continuous and formed a densely packed grain structure with an average roughness of less than 0 5 µm. The influence of important electrochemical parameters: current density, kind of reactor, pH or mixing operation, on the efficiency of the oxidation was investigated. The fouling of electrode's surface caused by the deposition of organic material was observed during CV and galvanostatic experiments. At low current density the oxidation rate constant k was low, but the current efficiency was relatively high. The BDD can be used successfully to remove heterogeneous aromatic compounds existing either as molecules or cations. During 4 h of electrolysis 95% of aromatic compounds were electrochemically decomposed to mineral forms. It was observed that the influence of the initial pH on mineralization was marginal. PACS

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“…Electrochemical techniques as a tertiary treatment to eliminate colour have been receiving great attention in the last years [2][3][4][5][6]. The application of these methods does not require the use of chemicals, besides a supporting electrolyte, usually already present in the effluents.…”

Section: Introductionmentioning

confidence: 99%

Degradation of a Textile Dye C. I. Direct Red 80 by Electrochemical Processes

Lopes¹,

Martins²,

Morão³

et al. 2004

Port. Electrochim. Acta

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The electrochemical removal of the textile dye C. I. Direct Red 80 (DR80) was carried out using three different materials as anodes: iron, polypyrrole (PPy) and boron doped diamond (BDD). Iron electrodes are consumed during the electrolysis, and promote flocculation/coagulation of the dye. Polypyrrole, a conducting polymer, was prepared by chemical/electrochemical precipitation over a cotton cloth; it enables the precipitation of the dissolved dye through a conversion reaction in a less soluble compound. Boron doped diamond electrode was used to achieve the complete mineralization of the dye. Bulk electrolysis were studied using Na 2 SO 4 as electrolyte. In the case of the PPy electrode, NH 4 NO 3 was also used as electrolyte. The variation of the dye concentration was followed by UV-visible absorbance measurements and chemical oxygen demand (COD) tests were also performed, to compare the rates of colour and COD removal in each case. From the COD measurements over the time of electrolysis, using the BDD anode, a mass transfer coefficient for the DR80 molecule was determined. The obtained results show an almost complete colour removal for all the electrodes tested and a COD removal between 50 and 90 %, being the best results obtained with the BDD electrode.

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Degradation of mixtures of phenols using boron doped diamond electrodes for wastewater treatment

Cited by 76 publications

References 14 publications

Electrochemical Detection of Sugar-related Compounds Using Boron-doped Diamond Electrodes

Electrochemical Detection of Sugar-related Compounds Using Boron-doped Diamond Electrodes

Application of BDD thin film electrode for electrochemical decomposition of heterogeneous aromatic compounds

Degradation of a Textile Dye C. I. Direct Red 80 by Electrochemical Processes

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