Preparation of particle electrodes from manganese slag and its degradation performance for salicylic acid in the three-dimensional electrode reactor (TDE)

Chen, Hao; Feng, Yi; Suo, Ning; Long, Yingying; Li, Xue; Shi, Yulong; Yu, Youming

doi:10.1016/j.chemosphere.2018.10.097

Cited by 36 publications

(12 citation statements)

References 29 publications

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“…When the interelectrode distance was 7.5 cm, the CBZ removal was 80% after 45 min, while at d = 3.5 cm, CBZ was completely removed after 10 min. This might be due to the short distance, which favored the mass transfer [45]. Thus, an interelectrode distance of 3.5 cm was chosen to continue the work.…”

Section: Effect Of Interelectrode Distance Reaction Time and Current Density On Cbz Removalmentioning

confidence: 99%

“…The effect of the reaction time on CBZ removal can be analyzed using Figure 2. With the increase of the reaction time, the production of strong oxidizing substances in the reactor rose, causing an increase in the CBZ removal rate [45]. However, an increase of the reaction time corresponded to an increase of the hydraulic retention time in continuous operation, and consequently larger reactors and higher energy consumption.…”

Section: Effect Of Interelectrode Distance Reaction Time and Current Density On Cbz Removalmentioning

confidence: 99%

“…This was due to the increase in conductivity of the solution. A low electrolyte concentration results in a poor conductivity of the solution and the inability to produce sufficiently strong oxidizing substances [45]. Besides this, if NaCl is used as electrolyte, Ti-based anodes generate chlorine species (Cl 2 , HOCl, and ClO − ), which help the degradation of organic material by indirect and direct oxidation [34].…”

Section: Effect Of Electrolyte Concentration On Cbz Removalmentioning

confidence: 99%

“…Figure 6 shows that the degradation efficiency of CBZ decreased as the initial CBZ concentration increased. This may be attributed to the presence of refractory functional groups, such as the benzene ring, which may inhibit the catalytic reaction [45]. Although the degradation was much faster at lower concentrations, the initial concentration of 10 mg/L, used previously, was considered adequate for the following experiments, because this was the least favorable situation, and at the same time allowed the evaluation of the influence of the process variables within a wider range.…”

Section: Effect Of Initial Cbz Concentration On Cbz Removalmentioning

confidence: 99%

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A Three-Dimensional Electrochemical Process for the Removal of Carbamazepine

et al. 2021

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The scientific community is increasingly concerned about the presence of pharmaceuticals in the aquatic environment, which is a consequence of their high consumption and inefficient removal by wastewater-treatment plants. The search for an effective and sustainable tertiary treatment is therefore needed to enhance their removal. For this purpose, the combination of electrochemical and adsorption processes into three-dimensional (3D) electrochemical systems has been proposed. In this study, a 3D system was studied to remove carbamazepine, an antiepileptic, consumed in high doses and very persistent in the environment. The influences of the following parameters on its removal were evaluated: anode and cathode materials and distance between them, electrolyte (NaCl) concentration and pH, and the (carbon-based) adsorbent material used as the particulate electrode. The obtained results demonstrated that the introduction of the particulate electrode improved the removal efficiency. This can be attributed to the simultaneous occurrence of different phenomena, such as adsorption/electrosorption, electrocoagulation, oxidation, and catalytic degradation.

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Section: Effect Of Interelectrode Distance Reaction Time and Current Density On Cbz Removalmentioning

confidence: 99%

Section: Effect Of Interelectrode Distance Reaction Time and Current Density On Cbz Removalmentioning

confidence: 99%

Section: Effect Of Electrolyte Concentration On Cbz Removalmentioning

confidence: 99%

Section: Effect Of Initial Cbz Concentration On Cbz Removalmentioning

confidence: 99%

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A Three-Dimensional Electrochemical Process for the Removal of Carbamazepine

et al. 2021

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“…As expected, typical EPR spectra of the DMPO-•OH adduct with a 1:2:2:1 quartet were acquired in the 3D and 2D electro-reactors when current and voltage were applied, as shown in Figure 4. It is worth noting that the 3D electro-reactor achieved the higher EPR intensity, which was nearly 2.52 times higher than the corresponding value of the 2D electro-reactor and demonstrated that the electro-generation of •OH occurred on the CGAC electrodes and the usage of the CGAC electrodes could enhance •OH generation effectively in electrochemical oxidation processes [36]. and demonstrated that the electro-generation of •OH occurred on the CGAC electrodes and the usage of the CGAC electrodes could enhance •OH generation effectively in electrochemical oxidation processes [36].…”

Section: Electrochemical Properties Of Toc and Cod Degradation In The...mentioning

confidence: 87%

A Comparison of the Mechanism of TOC and COD Degradation in Rhodamine B Wastewater by a Recycling-Flow Two- and Three-dimensional Electro-Reactor System

Shi

2020

Water

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Dye wastewater, as a kind of refractory wastewater (with a ratio of biochemical oxygen demand (BOD) and chemical oxygen demand (COD) of less than 0.3), still needs advanced treatments in order to reach the discharge standard. In this work, the recycling-flow three-dimensional (3D) electro-reactor system was designed for degrading synthetic rhodamine B (RhB) wastewater as dye wastewater (100 mg/L). After 180 min of degradation, the removal of total organic carbon (TOC) and chemical oxygen demand (COD) of RhB wastewater were both approximately double the corresponding values in the recycling-flow two-dimensional (2D) electro-reactor system. Columnar granular activated carbon (CGAC), as micro-electrodes packed between anodic and cathodic electrodes in the recycling-flow 3D electro-reactor system, generated an obviously characteristic peak of anodic catalytic oxidation, increased the mass transfer rate and electrochemically active surface area (EASA) by 40%, and rapidly produced 1.52 times more hydroxyl radicals (·OH) on the surface of CGAC electrodes, in comparison to the recycling-flow 2D electro-reactor system. Additionally, the recycling-flow 3D electro-reactor system can maintain higher current efficiency (CE) and lower energy consumption (Es).

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