Electrochemical degradation of estrone using a boron-doped diamond anode in a filter-press reactor

Brocenschi, Ricardo F.; Rocha‐Filho, Romeu C.; Bocchi, Nerilso; Biaggio, Sonia R.

doi:10.1016/j.electacta.2015.09.170

Cited by 42 publications

(18 citation statements)

References 56 publications

(83 reference statements)

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“…At the same j value and temperature, the DEET abatement degradation in the order BDD, PbO 2 , and Pt [52]. It also can be seen the higher oxidation power of BDD became evident in removing estrone than β-PbO 2 anode [83].…”

Section: Boron-doped Diamondmentioning

confidence: 81%

Recent Trends in Removal Pharmaceuticals and Personal Care Products by Electrochemical Oxidation and Combined Systems

Dao

Yang

Chen

et al. 2020

Water

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Due to various potential toxicological threats to living organisms even at low concentrations, pharmaceuticals and personal care products in natural water are seen as an emerging environmental issue. The low efficiency of removal of pharmaceuticals and personal care products by conventional wastewater treatment plants calls for more efficient technology. Research on advanced oxidation processes has recently become a hot topic as it has been shown that these technologies can effectively oxidize most organic contaminants to inorganic carbon through mineralization. Among the advanced oxidation processes, the electrochemical advanced oxidation processes and, in general, electrochemical oxidation or anodic oxidation have shown good prospects at the lab-scale for the elimination of contamination caused by the presence of residual pharmaceuticals and personal care products in aqueous systems. This paper reviewed the effectiveness of electrochemical oxidation in removing pharmaceuticals and personal care products from liquid solutions, alone or in combination with other treatment processes, in the last 10 years. Reactor designs and configurations, electrode materials, operational factors (initial concentration, supporting electrolytes, current density, temperature, pH, stirring rate, electrode spacing, and fluid velocity) were also investigated.

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Section: Boron-doped Diamondmentioning

confidence: 81%

Recent Trends in Removal Pharmaceuticals and Personal Care Products by Electrochemical Oxidation and Combined Systems

Dao

Yang

Chen

et al. 2020

Water

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“…No entanto, esse valor máximo de CE é ainda menor que outros relatados recentemente para a oxidação eletroquímica de poluentes orgânicos. [25][26][27][28] Os experimentos realizados com aplicação de 25 mA cm -2 tem menor consumo energético, demonstrando que estes experimentos podem ter uma melhor eficiência em baixas densidades de correntes.…”

Section: Tratamento Eletroquímico Do Efluente De Biodieselunclassified

TRATAMENTO ELETROQUÍMICO DE EFLUENTE DA PRODUÇÃO DE BIODIESEL USANDO UM ELETRODO DO TIPO ADE: Ti/IrO2-Nb2O5

et al. 2017

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5 . The anode was prepared by modified Pechini method and characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), in order to evaluate structural and morphological properties and by electrochemical impedance spectroscopy, cyclic voltammetry and accelerated stability test to investigate the electrochemical behavior. The SEM image shows the typical mud-cracked layer. By the XRD measurements, the oxides onto the support were crystallized as tetragonal IrO 2 and hexagonal Nb 2 O 5 . The amount of glycerin and methanol in the wastewater were 1.60 and 0.31% (w/w), respectively. The electrochemical treatment of the wastewater was evaluated by electrolysis at different current densities and time. The total organic carbon (TOC) and UV-Vis spectra were performed during the electrolysis. The UV-Vis spectra obtained during the electrolysis at 100 and 150 mA cm -2 , shows the disappearance of an absorption band at 264 nm and the appearance of one at 290 nm, which the absorption increases as current and the time of the electrolysis increases. The electrochemical treatment with the proposed DSA leads to 80% of removal of TOC by electrolysis at 150 mA cm -2 during the first 6 hours of the electrochemical treatment.Keywords: biodiesel; wastewater; electrochemical treatment; DSA. INTRODUÇÃOO aumento da demanda por energia associado à limitação de fontes energéticas têm levado ao desenvolvido de estratégias para o uso de fontes alternativas de energia, como os biocombustíveis. Estudos têm mostrado que o uso de biocombustíveis reduz a emissão de gases tóxicos relacionados ao efeito estufa, como HCs, CO e CO 2 , particulados de matéria orgânica e óxidos sulfurosos responsáveis pela chuva ácida.1 O biodiesel é produzido a partir de óleos vegetais, gordura animal, óleos e gorduras residuais que, na presença de um catalisador ácido, básico ou enzimático, reage com álcool de cadeia curta, metanol ou etanol, resultando em ésteres de ácidos graxos de cadeia longa.2 Na produção industrial do biodiesel é necessário um excesso de álcool para promover maior rendimento na reação. 3O biodiesel é formado em um mecanismo reversível de três etapas consecutivas, onde o triglicerídeo é convertido a diglicerídeos, monoglicerídeos e glicerol, principal coproduto da obtenção do biodiesel, resultando em 3 mols de ésteres para cada 1 mol de triglicerídeo. 4 Nos últimos anos, o biodiesel tornou-se uma fonte de energia alternativa promissora mundialmente, sendo que os E.U.A. ocupam a 1 a posição no ranking mundial, com produção de 5.927.952 m 3 no ano 2016. O Brasil ocupa a 2ª posição neste ranking e, segundo dados da Agência Nacional de Petróleo, Gás Natural e Biocombustível (ANP), foram produzidos 3.801.339 m 3 de biodiesel no ano de 2016, sendo 1.646.828 m 3 de biodiesel somente na região do Centro-Oeste, a maior produtora do Brasil, com 43,3% do total produzido. 5 Atualmente, a legislação brasileira determina a mistura compulsória de 8% em volume de biodiesel ao óleo diesel rodoviário, formando o que se denomina a mistura B8, ...

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“…After an electrolysis time of 300 min, 90% of TOC removal was reached, compared to only 70% without Cl À ions. The acceleration effect of the presence of chloride ions in this study correlated with the electrogenerated active chlorine (Cl 2 , HClO or ClO À ) which can indirectly oxidize the organics [13,14,57,58]. Moreover, due to the electrochemical properties of BDD, chloride radical (Cl ) is the first-step product of direct oxidation of chloride with BDD anode [40] (Table 1, reaction a).…”

Section: Electrochemical Oxidation Of Pharmaceuticals In the Presencementioning

confidence: 99%

“…Numerous studies were carried out to investigate the electrochemical behavior of the BDD anode for the removal of pharmaceutical products, such as 17 b-estradiol [13], estrone [14], paracetamol [15], sulfamethoxazole [16,17], atenolol [18] and trimethoprim [17] in synthetic solutions. In all cases, total mineralization has been achieved.…”

Section: Introductionmentioning

confidence: 99%

On the role of salts for the treatment of wastewaters containing pharmaceuticals by electrochemical oxidation using a boron doped diamond anode

Lan

Coetsier

Causserand

et al. 2017

Electrochimica Acta

150

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao. Refractory pharmaceuticals remain in biologically treated wastewater and are continuously discharged into aquatic systems due to their limited biodegradability. Electrochemical oxidation is promising for the treatment of such refractory compounds, in particular using a boron doped diamond (BDD) anode. This study investigates the role of salts, such as sulfates and chlorides in the electrochemical treatment of wastewater. The presence of sulfates accelerated the removal of ciprofloxacin and sulfamethoxazole, but had no effect on the oxidation of salbutamol. This comparison highlights the selectivity of the reaction between organics and sulfate radicals. The addition of chlorides into the solution led to a remarkablyfaster degradation of ciprofloxacin. However, incomplete mineralization was observed at high current densities due to the significant formation of halogenated organic compounds (AOX). The formation of refractory and toxic compounds such as ClO 4 À and AOX can be limited under the control of (i) applied current intensity and (ii) duration of electrolysis. Electrochemical oxidation of concentrated biologicallytreated hospital wastewater investigated the excellent removal of biorefractory pharmaceuticals and confirmed the acceleration effect of salts on pharmaceutical degradation.

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Electrochemical degradation of estrone using a boron-doped diamond anode in a filter-press reactor

Cited by 42 publications

References 56 publications

Recent Trends in Removal Pharmaceuticals and Personal Care Products by Electrochemical Oxidation and Combined Systems

Recent Trends in Removal Pharmaceuticals and Personal Care Products by Electrochemical Oxidation and Combined Systems

TRATAMENTO ELETROQUÍMICO DE EFLUENTE DA PRODUÇÃO DE BIODIESEL USANDO UM ELETRODO DO TIPO ADE: Ti/IrO2-Nb2O5

On the role of salts for the treatment of wastewaters containing pharmaceuticals by electrochemical oxidation using a boron doped diamond anode

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