Experimental study on the optimisation of azo-dyes removal by photo-electrochemical oxidation with TiO2 nanotubes

Mais, Laura; Vacca, Annalisa; Mascia, Michele; Usai, E.; Tronci, Stefania; Palmas, Simonetta

doi:10.1016/j.chemosphere.2020.125938

Cited by 40 publications

(9 citation statements)

References 22 publications

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“…A comparison of the performance of photo-electrocatalytic systems is not straightforward, because, as pointed out in the introduction, several factors may affect the final result. Instead, a more direct comparison may be made with the results obtained in previous work, carried out in our laboratory with the same system [7,26]. Depending on the operative conditions, K values in the range of 6 × 10 −4 to 9 × 10 −3 min −1 have been calculated for the treatment of methyl orange, while in the case of phenol K ranged from 1.1 × 10 −3 to 6.5 × 10 −3 min −1 which confirm that different reactivity of the aromatic compounds may be connected to the different groups linked to the aromatic ring.…”

Section: Catalysts 2020 10 X For Peer Review 5 Of 17mentioning

confidence: 97%

“…The 2FFD was applied to perform galvanostatic photoelectrochemical degradation tests and determine the interaction between different selected factors. On the bases of previous work carried out in our laboratory [7], electrolyte flow rate (Q), along with applied current (I) and initial reactant concentration (C 0 ), have been selected as control parameters which could influence the process of the reactant removal, while the electrode was irradiated by a constant light power, generated by the solar simulator. Aqueous solutions of DRN were used to simulate the wastewater: the pollutant removal process was carried out under galvanostatic conditions and the runs were made in double.…”

Section: Doe Model Descriptionmentioning

confidence: 99%

“…Electrochemical advanced oxidation processes (EAOPs) have been widely studied for the treatment of bio-recalcitrant and persistent organic pollutants [1][2][3], including pesticides [4,5], pharmaceuticals and textile dyes [6][7][8], to mention a few. EAOPs are based on the generation of hydroxyl radicals (•OH), which are non-selective and powerful oxidizing species exploitable as pre-treatment to improve the biodegradability, or as post treatment to remove traces of organic pollutants [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Design of Experiment for the Optimization of Pesticide Removal from Wastewater by Photo-Electrochemical Oxidation with TiO2 Nanotubes

et al. 2020

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The Design of Experiment (DoE) technique has been used to investigate the photo-electrochemical removal of diuron (DRN) from wastewater. The process is carried out in a photo-electrochemical flow reactor, in which titania nanotubular electrode is irradiated with a simulated solar light. Different operative conditions have been investigated, in a planned 23 full factorial design in which imposed current density, flow rate and initial concentration have been varied at two levels. The removal process of DRN was investigated in terms of specific removal rate (K) and cell voltage (E), which were assumed as objective functions: the results show that the applied current has a paramount effect on both of the objective functions. From the analyses of the intermediates, it appears that the investigated parameters may exert different effects on the distribution of the reaction products: the initial concentration of diuron and the electrode potential seem to play a more important role, in this case.

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Section: Catalysts 2020 10 X For Peer Review 5 Of 17mentioning

confidence: 97%

Section: Doe Model Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design of Experiment for the Optimization of Pesticide Removal from Wastewater by Photo-Electrochemical Oxidation with TiO2 Nanotubes

et al. 2020

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“…Os principais métodos usualmente empregados para remoção de poluentes orgânicos em águas residuais incluem tratamento eletroquímico [3], processos oxidativos avançados (POA's) [4,5], floculação [6], separação por membrana [7], adsorção [8], etc. Os POA's normalmente envolvem a geração de radicais hidroxila (⋅OH), uma espécie com forte capacidade de oxidação para degradar os poluentes persistentes em pequenas moléculas pouco tóxicas ou não tóxicas [9].…”

Section: Introductionunclassified

Síntese E Aplicação Do Óxido De Ferro À Degradação Do Corante Orgânico Azul De Metileno Por Meio Do Processo Fenton Heterogêneo

Santos¹,

Nunes²,

Silva³

et al. 2023

Anais Do v Congresso Online Nacional De Química - V CONDEQUI

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“…Many removal methods have been reported, such as advanced oxidation process [7][8][9], membrane filtration [10], ion exchange [11], electrochemical process [12,13], biological treatment process [14], and adsorption [15,16]. However, only few are accepted by industries.…”

Section: Introductionmentioning

confidence: 99%

Removal of Acid Red 88 Using Activated Carbon Produced from Pomelo Peels by KOH Activation: Orthogonal Experiment, Isotherm, and Kinetic Studies

Liu

Xing

2021

Journal of Chemistry

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Activated carbon (PPAC) from pomelo peels was prepared by carbonization and KOH activation. The performance of PPAC was assessed by removing acid red 88 (AR88) in aqueous solution. The most suitable activation processes were found by orthogonal experiments, aimed to achieve the maximum of removal capacity of AR88. Moreover, the possible mechanisms of adsorption were studied through the results of characterization, isotherm fitting, and kinetics simulation. Results showed the preparation parameter that mattered the most to AR88 removal efficiency was the activation temperature of PPAC, followed by impregnation ratio and activation time. The optimal preparation conditions of PPAC were at activation temperature 800°C, activation time 90 min, and impregnation ratio 2.5 : 1. The characterization results showed optimal PPAC had a microporous and amorphous carbon structure whose BET specific area and total pore volume were 2504 m2/g and 1.185 cm3/g, respectively. The isotherm fitting demonstrated that the sorption process followed the Langmuir model, and theoretical maximal sorption value was 1486 mg/g. The kinetics simulation showed that the pseudo-second-order model described the sorption behavior better, suggesting chemisorption seemed to be the rate-limiting step in the adsorption process. This work presented that PPAC was a promising and efficient adsorbent for AR88 from water.

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Experimental study on the optimisation of azo-dyes removal by photo-electrochemical oxidation with TiO2 nanotubes

Cited by 40 publications

References 22 publications

Design of Experiment for the Optimization of Pesticide Removal from Wastewater by Photo-Electrochemical Oxidation with TiO2 Nanotubes

Design of Experiment for the Optimization of Pesticide Removal from Wastewater by Photo-Electrochemical Oxidation with TiO2 Nanotubes

Síntese E Aplicação Do Óxido De Ferro À Degradação Do Corante Orgânico Azul De Metileno Por Meio Do Processo Fenton Heterogêneo

Removal of Acid Red 88 Using Activated Carbon Produced from Pomelo Peels by KOH Activation: Orthogonal Experiment, Isotherm, and Kinetic Studies

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