Electrochemical oxidation technology to treat textile wastewaters

Rodríguez-Narváez, Oscar M.; Picos-Benítez, Alain R.; Bravo-Yumi, Nelson; Pacheco‐Álvarez, Martín; Martínez‐Huitle, Carlos A.; Peralta‐Hernández, Juan M.

doi:10.1016/j.coelec.2021.100806

Cited by 74 publications

(34 citation statements)

References 95 publications

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“…The standard water treatment solutions cannot effectively decolorize dyes because of their complex chemical structure and resistance to oxidizing chemicals and light. Hence, these dyes are processed using a variety of procedures commonly employed in industrial effluent treatment, such as membrane process (Liu et al, 2020;Rashidi et al, 2015), solidification (Khayat and Zali-Boeini, 2019), ion exchange (Joseph et al, 2020), electrochemical oxidation (Rodríguez-Narváez et al, 2021), and absorption (Nouri et al, 2021;Saleh et al, 2021). However, among present treatment methods, adsorption is the most effective solution for removing contaminants from an aquatic environment due to its ease of usage and high efficiency (Nodehi et al, 2022;Sarbisheh et al, 2017;Tran et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Biochar Derived from Sesbania sesban Plant as a Potential Low-Cost Adsorbent for Removal of Methylene Blue

Hiep¹,

Thu²,

Quyen³

et al. 2022

Environ. Nat. Resour. J.

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In this study, biochar made from the Sesbania sesban plant, under slow pyrolysis at 300°C was used to adsorb methylene blue (MB) in aqueous solution. The biochar properties were clarified by diverse analytical methods such as FTIR, SEM, and BET. The results indicated that the surface of biochar was relatively smooth, had porous texture, and stacked evenly. In addition, the biochar had a large specific surface area of 561.8 m2/g and the pHpzc value was 6.9. The effect of adsorbent dosage, initial pH, contact time, and concentration of dye solution on biochar were investigated. The optimum conditions for MB adsorption were found at the MB concentration of 50 mg/L, initial pH of 11, biochar mass of 0.6 mg, and contact time of 30 min. Under these optimal conditions, MB dye removal efficiency was above 90%. Adsorption isotherm data were fitted with the Langmuir isotherm model (R2=0.897) suggesting the adsorption was monolayer, and its maximum adsorption capacity was about 6.6 mg/g. The adsorption kinetic models showed that the linear pseudo-second-order by R2=0.999 was well fitted. The results indicated the enormous potential of Sesbania sesban plant to produce biochar as a low-cost and rather high-effective adsorbent for dye removal from wastewater as well as water quality improvement.

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Section: Introductionmentioning

confidence: 99%

Biochar Derived from Sesbania sesban Plant as a Potential Low-Cost Adsorbent for Removal of Methylene Blue

Hiep¹,

Thu²,

Quyen³

et al. 2022

Environ. Nat. Resour. J.

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“…Essentially, there are two different types of EO mechanisms: direct and indirect oxidation approaches [ 24 , 25 ]. Although direct oxidation is feasible under specific conditions, in some processes, indirect oxidation can become dominant when non-active electrodes (such as boron-doped diamond (BDD), PbO 2 , or Ti 4 O 7 ) are used, because these are considered the most efficient anodes for oxidizing pollutants in water due to their high potential for the electrogeneration of a great amount of heterogenous free hydroxyl radicals ( • OH) and/or other oxidants [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Photovoltaic Electrochemically Driven Degradation of Calcon Dye with Simultaneous Green Hydrogen Production

et al. 2022

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In this study, for the first time, the production of green hydrogen gas (H2) in the cathodic compartment, in concomitance with the electrochemical oxidation (EO) of an aqueous solution containing Calcon dye at the anodic compartment, was studied in a PEM-type electrochemical cell driven by a photovoltaic (PV) energy source. EO of Calcon was carried out on a Nb/BDD anode at different current densities (7.5, 15 and 30 mA cm−2), while a stainless steel (SS) cathode was used for green H2 production. The results of the analysis by UV-vis spectroscopy and total organic carbon (TOC) clearly showed that the electrochemical oxidation (EO) of the Calcon dye after 180 min of electrolysis time by applying 30 mA cm−2 reached up to 90% of degradation and 57% of TOC removal. Meanwhile, under these experimental conditions, a green H2 production greater than 0.9 L was achieved, with a Faradaic efficiency of 98%. The hybrid electrolysis strategy is particularly attractive in the context of a circular economy, as these can be coupled with the use of more complex water matrices to transform organic depollution into an energy resource to produce H2 as a chemical energy carrier.

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“…The higher the OEP, the more efficient is the electrode for complete oxidation of organic pollutants. When the OEP of the anode is lower than the direct electron transfer potential of organic pollutants, the oxygen evolution reaction occurs first in the anode during the electrolysis (Rodriguez-Narvaez et al 2021). This reduces the rate of • OH generated and the current efficiency, and prolongs the electrolysis duration, resulting in higher energy consumption (Muddemann et al 2021).…”

Section: Introductionmentioning

confidence: 99%

PbO2 modified BDD electrode by dicationic ionic liquids assisted electrodeposition for efficient electrocatalytic degradation of pesticide wastewater

Tang

Feng

2022

Water Science and Technology

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Pesticide wastewater is difficult to treat, and it is necessary to develop a new anode material electrochemical oxidation to efficiently degrade pesticide wastewater. DIL-PbO2-Ti/BDD electrodes with better electrocatalytic oxidation performance were obtained by using dicationic ionic liquid (DIL) for assisted electrodeposition of PbO2 modified boron-doped diamond (BDD) electrodes. At a current density of 100 mA cm−2 and a temperature of 25 °C using the DIL-PbO2-Ti/BDD electrode as anode and titanium plate as cathode. The electrochemical window and Oxygen evolution potential (OEP) of the DIL-PbO2-Ti/BDD electrode obtained by CV testing at a scan rate of 50 mV s−1 in 1 M H2SO4 were 4.12 V and 3.29 V, respectively. Under the conditions of current density of 100 mA cm−2, 25 °C, pH 12, salt content of 8%, chemical oxygen demand (COD) of 24,280.98 mg L−1, and total nitrogen (TN) content of 5,268 mg L−1, after electrification for 12 h, the removal efficiency of COD and TN reached 64.88% and 67.77%, respectively, indicating that the DIL-PbO2-Ti/BDD electrode has excellent electrocatalytic performance. In order to further understand the mechanism of electrochemical degradation of pesticide wastewater, HPLC-MS was used to detect the intermediates in the degradation process, and the possible degradation pathways were proposed in turn.

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Electrochemical oxidation technology to treat textile wastewaters

Cited by 74 publications

References 95 publications

Biochar Derived from Sesbania sesban Plant as a Potential Low-Cost Adsorbent for Removal of Methylene Blue

Biochar Derived from Sesbania sesban Plant as a Potential Low-Cost Adsorbent for Removal of Methylene Blue

Photovoltaic Electrochemically Driven Degradation of Calcon Dye with Simultaneous Green Hydrogen Production

PbO2 modified BDD electrode by dicationic ionic liquids assisted electrodeposition for efficient electrocatalytic degradation of pesticide wastewater

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