Synergy optimization for the removal of dye and pesticides from drinking water using granular activated carbon particles in a 3D electrochemical reactor

Ghanbarlou, Hosna; Pedersen, Nikoline Loklindt; Fini, Mahdi Nikbakht; Muff, Jens

doi:10.1007/s11356-020-08022-w

Cited by 15 publications

(6 citation statements)

References 24 publications

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“…The best results were obtained for the activated carbon supplied by SARATECH ® , although there were no significant differences between the three particulate electrodes at 30 and 45 min (p < 0.05). Activated carbon may be polarized within an electric field [53], increasing the overall active electrode area [54], which can explain the results obtained for the tested activated carbon. Nonetheless, the biochars can be a more sustainable and economic alternative to the activated carbon.…”

Section: Effect Of the Particulate Electrode On Cbz Removalmentioning

confidence: 59%

“…Surprisingly, the biochar TN 1-2 mm, which showed a much lower adsorption capacity in the adsorption experiments, presented a removal efficiency that was very similar to the activated carbon and slightly better than the one for the biochar TN < 75 µm. It is known that the polarizability of a particulate electrode is of higher importance than its adsorption capacity [53]. In this study, it was also observed that the adsorbent with lower adsorption capacity to CBZ, when used in a 3D process, and thus after polarization, showed a completely different behavior, and very promising application perspectives.…”

Section: Effect Of the Particulate Electrode On Cbz Removalmentioning

confidence: 61%

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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 the Particulate Electrode On Cbz Removalmentioning

confidence: 59%

Section: Effect Of the Particulate Electrode On Cbz Removalmentioning

confidence: 61%

A Three-Dimensional Electrochemical Process for the Removal of Carbamazepine

et al. 2021

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“…The presence of activated carbon under the electric field between anode and cathode within undivided cell ensure the creation of a double electric layer that is able to adsorb organic pollutant via an electro sorption mechanism [47]. Additionally, AC particles are polarized as anode and as a cathode depending on their position, generating a large number of micro-electrolysis cells, which should generate oxidant species (e.g., hydroxyl radicals) able to oxidize and mineralize the organic pollutant adsorbed onto its surface [30,48].…”

Section: Activated Carbon-based Sorption-assisted Electrochemical Oxi...mentioning

confidence: 99%

Advanced Electrochemical Degradation of Organic Pollutants from Water using Sb-Doped SnO2/Ti Anode and Assisted by Granular Activated Carbon

Baciu,

Orha,

Nicolae

et al. 2023

Coatings

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In this paper, mesoporous electrodes consisting of Sb-doped SnO2 deposited onto Ti plates that had undergone controlled corrosion under acidic medium were synthesized via a spin-coating method and morpho-structurally characterized via X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrodes were electrochemically tested to examine their degradation/mineralization through electrooxidation (EO) of doxorubicin (DOX) as a single component and multi-component, together with capecitabine (CCB) from the cytostatic class and humic acid (HA) from the natural organic matter (NOM) class in the absence/the presence of activated carbon (AC) as a particulate electrode. The best mineralization efficiency of 67% was achieved for DOX mineralization using Sb-doped SnO2 deposited onto a Ti plate that had undergone controlled corrosion with oxalic acid during the electrooxidation process. The presence of AC within the electrolysis process generated a synergistic effect of 52.75% for total organic carbon (TOC) parameter removal, which is in accordance with and significantly better than the results reported in the literature. The aspects related to the complex mechanism of DOX degradation and mineralization are discussed. The superiority of AC assisted electrooxidation, as electrochemical filtering (EF), was proved, considering simultaneous degradation and mineralization of mixture of doxorubicin, capecitabine and humic acid.

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“…The improvement of three-dimensional electrochemical systems (using GACs as the third electrode) was attributed to its extensive specific surface area [13][14][15] and the ability of carbon materials to promote the generation of hydrogen peroxide by an oxygen reduction reaction [16][17][18]. Nevertheless, when GAC is applied as the third electrode, the efficiency of the technology depends mostly on the adsorption properties of the organic micropollutants [19,20]. For instance, some compounds such as phenoxy-acid herbicides have less tendency to adsorb to the carbon [10], resulting in low adsorption capacity and low removal efficiency in these systems.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, enhancement of the synergy parameter is important for optimization of the three-dimensional electrochemical system. The synergy parameter has been studied by a few researchers in three-dimensional systems using GACs as particle electrode [9,10,20]. In the work of Zhu et al, it was found that synergy not only resulted from direct electrochemical oxidation at activated carbon, but also the electrocatalysis of activated carbon to indirect electrochemical oxidation mediated by hydroxyl radicals [9].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Graphene Iron-Based Particle Electrode Outperforms Activated Carbon in Three-Dimensional Electrochemical Water Treatment Systems

Ghanbarlou

Pedersen

Simonsen

et al. 2020

Water

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The synergy between electrochemical oxidation and adsorption on particle electrodes was investigated in three-dimensional (3D) systems for p-nitrosodimethylaniline (RNO) decolorization and pesticide removal. A comparison was made between granular activated carbon (GAC) and a novel synthesized nitrogen-doped graphene-based particle electrode (NCPE). Experiments on RNO decolorization show that the synergy parameter of the 3D-NCPE system was improved 3000 times compared to the studied 3D-GAC system. This was due to the specific nanostructure and composition of the NCPE material. Nitrogen-doped graphene triggered an oxygen reduction reaction, producing hydrogen peroxide that simultaneously catalyzed on iron sites of the NCPEs to hydroxyl radicals following the electro-Fenton (EF) process. Data showed that in the experimental setup used for the study, the applied cell voltage required for the optimal value of the synergy parameter could be lowered to 5V in the 3D-NCPEs process, which is significantly better than the 15–20 V needed for synergy to be found in the 3D-GAC process. Compared to previous studies with 3D-GAC, the removal of pesticides 2,6 dichlorobenzamide (BAM), 2-methyl-4-chlorophenoxyaceticacid (MCPA), and methylchlorophenoxypropionic acid (MCPP) was also enhanced in the 3D-NCPE system.

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Synergy optimization for the removal of dye and pesticides from drinking water using granular activated carbon particles in a 3D electrochemical reactor

Cited by 15 publications

References 24 publications

A Three-Dimensional Electrochemical Process for the Removal of Carbamazepine

A Three-Dimensional Electrochemical Process for the Removal of Carbamazepine

Advanced Electrochemical Degradation of Organic Pollutants from Water using Sb-Doped SnO2/Ti Anode and Assisted by Granular Activated Carbon

Nitrogen-Doped Graphene Iron-Based Particle Electrode Outperforms Activated Carbon in Three-Dimensional Electrochemical Water Treatment Systems

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