Experimental design methodology applied to electrochemical oxidation of carbamazepine using Ti/PbO2 and Ti/BDD electrodes

García-Gómez, Celestino; Drogui, Patrick; Zaviska, François; Seyhi, Brahima; Gortáres‐Moroyoqui, Pablo; Buelna, Gerardo; Neira-Sáenz, C.; Estrada‐Alvarado, María Isabel; Ulloa-Mercado, Ruth Gabriela

doi:10.1016/j.jelechem.2014.08.032

Cited by 114 publications

(48 citation statements)

References 41 publications

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“…The following second‐order equation gives the predicted response in the all experimental field (Eq. [7]) (García‐Gómez et al, 2014):

Y = b_{normalo} + \sum_{i = 1}^{k} b_{i} X_{i} + \sum_{i = 1}^{k} b_{i i} X_{i}^{2} + \sum_{j} \sum_{i = 2}^{k} b_{i j} X_{i} X_{j}

where Y is the experimental response; b o is the average of experimental response; coefficients b i , b ii , and b ij are, respectively, the linear, quadratic, and interaction effects between the factors X i and X j for the response Y , where i = 1 to 3, j = 1 to 3, and i ≠ j .…”

Section: Resultsmentioning

confidence: 99%

“…The coefficients of the equation models were calculated using the half difference between the arithmetic average of the values of the response when the variable is coded at the levels −1 and +1 (García‐Gómez et al, 2014; Carabin et al, 2016). These coefficients could be positive or negative depending on the way they affect the investigated response.…”

Section: Resultsmentioning

confidence: 99%

“…Treatment time and current intensity had the greatest effect on CAP removal, at 54.6 and 34.4%, respectively. The large effect of current intensity is a reflection of this parameter's control of the amount of OH − radicals and other oxidants produced in the reactor (Zaviska et al, 2013; García‐Gómez et al, 2014; Chen et al, 2015). However, the impact of the pollutant's initial concentration ( X 2 ) on the investigated response was relatively low (6.75%).…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Degradation of Chloramphenicol in Synthetic and Aquaculture Wastewater Using Electrooxidation

Romero-Soto¹,

Dia

Leyva-Soto³

et al. 2018

J of Env Quality

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Chloramphenicol (CAP) is a broad-spectrum antibiotic widely used in animal farming and aquaculture industries. Despite its ban in many countries around the world, it is still used in several developing countries, with harmful effects on the surrounding aquatic environment. In this study, an electrooxidation process using a Ti/PbO anode was used to investigate the degradation of CAP in both synthetic solution and real aquaculture wastewater. A central composite design was used to determine the optimum conditions for CAP removal. Current intensity and treatment time had the most impact on the CAP removal. These two factors accounted for ∼90% of CAP removal. The optimum conditions found in this study were current intensity of 0.65 A, treatment time of 34 min, and CAP initial concentration of 0.5 mg L. Under these conditions, 98.7% of CAP removal was achieved with an energy consumption of 4.65 kW h m. The antibiotic was not present in the aquaculture wastewater, which received 0.5 mg L of CAP and was treated (by electrooxidation) under the optimum conditions. A complete removal of CAP was obtained after 34 min of treatment. According to these results, electrooxidation presents an option for the removal of antibiotics, secondary compounds, and other organic and inorganic compounds from solution.

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“…The following second‐order equation gives the predicted response in the all experimental field (Eq. [7]) (García‐Gómez et al, 2014):

Y = b_{normalo} + \sum_{i = 1}^{k} b_{i} X_{i} + \sum_{i = 1}^{k} b_{i i} X_{i}^{2} + \sum_{j} \sum_{i = 2}^{k} b_{i j} X_{i} X_{j}

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Degradation of Chloramphenicol in Synthetic and Aquaculture Wastewater Using Electrooxidation

Romero-Soto¹,

Dia

Leyva-Soto³

et al. 2018

J of Env Quality

Self Cite

View full text Add to dashboard Cite

show abstract

“…RSM is a statistical method being useful for the experimental design and processes optimization (García-Gómez et al 2014;Khataee et al 2014). Box-Behnken design (BBD), which is a widely used form of RSM, was employed for the optimization of binary carbon support GDC.…”

Section: Gdc Preparation and Optimizationmentioning

confidence: 99%

Enhanced hydroxyl radical generation in the combined ozonation and electrolysis process using carbon nanotubes containing gas diffusion cathode

Zhang

et al. 2015

Environ Sci Pollut Res

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Combination of ozone together with electrolysis (ozone-electrolysis) is a promising wastewater treatment technology. This work investigated the potential use of carbon nanotube (CNT)-based gas diffusion cathode (GDC) for ozone-electrolysis process employing hydroxyl radicals (·OH) production as an indicator. Compared with conventional active carbon (AC)-polytetrafluoroethylene (PTFE) and carbon black (CB)-PTFE cathodes, the production of ·OH in the coupled process was improved using CNTs-PTFE GDC. Appropriate addition of acetylene black (AB) and pore-forming agent Na2SO4 could enhance the efficiency of CNTs-PTFE GDC. The optimum GDC composition was obtained by response surface methodology (RSM) analysis and was determined as CNTs 31.2 wt%, PTFE 60.6 wt%, AB 3.5 wt%, and Na2SO4 4.7 wt%. Moreover, the optimized CNT-based GDC exhibited much more effective than traditional Ti and graphite cathodes in Acid Orange 7 (AO7) mineralization and possessed the desirable stability without performance decay after ten times reaction. The comparison tests revealed that peroxone reaction was the main pathway of ·OH production in the present system, and cathodic reduction of ozone could significantly promote ·OH generation. These results suggested that application of CNT-based GDC offers considerable advantages in ozone-electrolysis of organic wastewater.

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“…A literatura mostra diversos processos de oxidação de compostos orgânicos sobre materiais semicondutores como, por exemplo, corantes da indústria têxtil, 21,22 poluentes na fase gasosa 23 e até na remoção simultânea de substâncias orgânicas e íons metálicos dissolvidos em meio aquoso. 6,7 Assim, a preparação de eletrodos com misturas de 25 A remoção da aspirina, anti-inflamatório largamente utilizado, em soluções aquosas, foi realizada através da oxidação anódica, empregando eletrodos de PbO 2 , diamante dopado com boro (DDB) e Ti/DDB como ânodos. A completa mineralização da aspirina foi alcançada quando utilizado os eletrodos de DDB e Ti/DDB.…”

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MATERIALS OF COMPOSITION Ti/Pb_XTi_1-XO₂FOR PHOTO-ASSISTED ELECTROCHEMICAL DEGRADATION OF ORGANIC POLLUTANTS

Fornazari¹,

Neto²,

Andrade³

et al. 2016

Química Nova

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. Electrochemical methods are an interesting and clean alternative for the abatement of toxic organic pollutants. This paper details the study of the synthesis of electrode materials of nominal composition Ti/Pb X Ti 1-X O 2 (X = 0; 0.05; 0.10; 0.20 e 0.30) and their use as electrodes for degradation of organic pollutants using both electrochemical and photo-assisted electrochemical techniques. The results demonstrate that the materials produced are interesting from the point of view of organic removal. The application of simultaneous UV radiation with electrical current was capable of removing greater amounts of the organic load (>32% in <1 h) than the electrochemical technique alone.Keywords: photo-assisted electrochemical degradation; formaldehyde; dimensionally stable anodes. INTRODUÇÃO Aspectos geraisNas últimas duas décadas, o crescimento de pesquisas na área de tratamento de substâncias tóxicas por métodos eletroquímicos têm sido quase exponencial. A primeira revisão neste contexto foi publicada por Rajeshwar et al., 1 em 1994, e desde então várias revisões estão sendo publicadas expondo os benefícios do tratamento eletroquímico, 2 na degradação anódica de poluentes, 3-5 em processos catódicos, como recuperação de metais, 6,7 são relativamente bem sucedidos, sendo implantados em escala industrial. Isso ocorre porque a maioria dos metais podem ser depositados em um grande espectro de materiais eletródicos e, como o valor agregado do metal é alto, a sua recuperação é viável. Por outro lado, em processos anódicos a degradação de muitas substâncias (especialmente orgânicas) é dificultada por mecanismos complexos de degradação e fenômenos de envenenamento da superfície do eletrodo. Além disso, a ausência de uma vantagem financeira clara faz com que o fator principal na escolha de um sistema de tratamento seja o custo que este acarreta. Neste sentido existe um grande esforço para desenvolver materiais eletródicos com elevada eficiência frente à degradação de substâncias orgânicas.Dentre essas pesquisas, muita atenção tem sido direcionada para os eletrodos compostos de óxidos catalíticos (p.ex. Métodos combinadosRecentemente a comunidade científica tem reconhecido que a eletroquímica em si não é necessariamente suficiente para mineralizar substâncias orgânicas complexas ou efluentes concentrados. Assim, o tratamento eletroquímico pode ser aplicado como um pré ou pós--tratamento (polishing), desenvolvendo tratamentos combinados como, por exemplo, tratamento eletroquímico seguido por biológico. Neste caso, o tratamento eletroquímico é utilizado para degradar moléculas resistentes à biodegradação, aumentando a eficiência e rapidez deste último.Outra possibilidade é a combinação do tratamento eletroquímico à fotocatalise, que, dependendo da área, é conhecida como fotoeletrocatalise ou eletroquímica fotoassistida. Em fotocatalise pura, um semicondutor pode atuar como um fotosensibilizador na fase heterogênea para a degradação oxidativa de substâncias orgânicas em soluções aquosas. 9A fotocatálise é um processo bas...

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Experimental design methodology applied to electrochemical oxidation of carbamazepine using Ti/PbO2 and Ti/BDD electrodes

Cited by 114 publications

References 41 publications

Degradation of Chloramphenicol in Synthetic and Aquaculture Wastewater Using Electrooxidation

Degradation of Chloramphenicol in Synthetic and Aquaculture Wastewater Using Electrooxidation

Enhanced hydroxyl radical generation in the combined ozonation and electrolysis process using carbon nanotubes containing gas diffusion cathode

MATERIALS OF COMPOSITION Ti/Pb_XTi_1-XO₂FOR PHOTO-ASSISTED ELECTROCHEMICAL DEGRADATION OF ORGANIC POLLUTANTS

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Experimental design methodology applied to electrochemical oxidation of carbamazepine using Ti/PbO2 and Ti/BDD electrodes

Cited by 114 publications

References 41 publications

Degradation of Chloramphenicol in Synthetic and Aquaculture Wastewater Using Electrooxidation

Degradation of Chloramphenicol in Synthetic and Aquaculture Wastewater Using Electrooxidation

Enhanced hydroxyl radical generation in the combined ozonation and electrolysis process using carbon nanotubes containing gas diffusion cathode

MATERIALS OF COMPOSITION Ti/PbXTi1-XO2FOR PHOTO-ASSISTED ELECTROCHEMICAL DEGRADATION OF ORGANIC POLLUTANTS

Contact Info

Product

Resources

About

MATERIALS OF COMPOSITION Ti/Pb_XTi_1-XO₂FOR PHOTO-ASSISTED ELECTROCHEMICAL DEGRADATION OF ORGANIC POLLUTANTS