Efficient removal of micropollutants from low-conductance surface water using an electrochemical Janus ceramic membrane filtration system

Li, Zhouyan; Li, Xuesong; Li, Yang; Li, Jiayi; Yi, Qiuying; Gao, Fei; Wang, Zhiwei

doi:10.1016/j.watres.2022.118627

Cited by 37 publications

(23 citation statements)

References 43 publications

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“…The efficiency of electrochemical systems would be diminished when the background electrolyte concentration is decreased to a certain level (e.g., below 10 mM, within the concentration range of surface water). 23 The NDMA removal efficiency of the CpPdM decreased in 5 mM Na 2 SO 4 (electrolyte) as shown in Figure S13a, while by much less than that of the CpM because of the contribution of Pdcatalyzed hydrogenation. The declined current density was observed from CV curves of the CpPdM (Figure S13b) with the decrease in the concentration of the electrolyte, leading to the deterioration of the direct electrochemical reduction efficiency.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The electrochemical reduction can be an appealing option for NDMA removal by a direct electrotransfer reaction. , However, traditional electrodes with flow-by mode suffer from the limitation of mass transfer. Thus, long residence times are required to reduce NDMA concentrations falling below levels known to pose chronic health risks. , Meanwhile, fouling on the surface of electrodes happens when treating complex water matrices. − Electroactive membrane technology has the potential to address these inherent limitations by separation and mass-transfer-enhanced flow-through operation mode, , and endowed more possibility for integrating synergistic processes, such as generating hydroxyl radicals via both anodic water oxidation and cathodic heterogeneous Fenton process, and the H*-mediated electrocatalytic filtration system for an efficient advanced oxidation process . Notably, the hydrogen evolution reaction as a side reaction is inevitable at the high cathode potential for NDMA removal, ,, which would increase the energy cost and decrease the decontamination efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Synergies of the Direct Electrochemical Reduction and Pd-Catalyzed Hydrogenation in a Sequential Membrane for an Efficient N-Nitrosodimethylamine Removal

Xie

et al. 2023

ACS EST Eng.

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Rapid and economic removal of N-nitrosodimethylamine (NDMA) calls for advanced treatment strategies due to its mutagenic and carcinogenic effects, small molecular size, high polarity, and uncharged properties. Herein, a sequential Pd-modified polymeric ultrafiltration (UF) membrane coated on a carbon paper substrate (CpPdM) was designed for the complete elimination of NMDA in one single pass with low energy consumption, with the synergetic processes of direct electrochemical reduction and Pd-catalyzed hydrogenation. The hydrogen gas, produced from direct electrochemical reduction, could trigger the Pd-catalyzed hydrogeneration to improve the NDMA destruction performance. In addition, the pre-rejection of interfering substances in the water matrix by the frontmost UF layer hugely mitigates the fouling issues on the electrode, thus improving the stability. Moreover, the flow-through operation mode overcame the mass transfer limitation of traditional electrodes in the flow-by mode (100% NDMA removal within 12.6 s of residence time at −2.3 V), resulting in 2 orders of magnitude enhancement in modified reaction kinetics. Furthermore, the combined treatment of the CpPdM and nanofiltration was superior to the conventional reverse osmosis process in NDMA removal and energy use. This work is expected to provide a new strategy for developing an energy-efficient advanced wastewater treatment system.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synergies of the Direct Electrochemical Reduction and Pd-Catalyzed Hydrogenation in a Sequential Membrane for an Efficient N-Nitrosodimethylamine Removal

Xie

et al. 2023

ACS EST Eng.

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“…A constant voltage of 3 V was applied using a DC power supply (L305SPL, eTOMMENS), which was chosen based on the results of previous studies. , An Ag/AgCl electrode (Lei-Ci, China) was used as a reference electrode to allow the measurement of electrode potentials. Real surface water was collected from a river located in Jinshan, a suburb of Shanghai.…”

Section: Methodsmentioning

confidence: 99%

“…In recent years, the coupling of EAOPs with low-pressure membrane filtration technology, known as electrochemical membrane filtration (EMF), has proven to be effective in degrading recalcitrant organics and micropollutants that could not be efficiently removed by conventional water treatment processes. , The EMF, combining the advantages of EAOP and membrane filtration, , enables enhanced mass transfer rates to achieve efficient pollutant degradation. − Furthermore, the development of Janus electrochemical membranes ensures the efficient removal of pollutants from low-conductance surface waters. , However, the investigations on antibiotic removal, toxicity reduction, and antibiotic resistance development inhibition in EMF systems are insufficient. Degradation of SAs in the EMF process may lead to the presence of intermediate products with antibiotic activities remaining in the permeate .…”

Section: Introductionmentioning

confidence: 99%

Antibiotic Removal, Toxicity Reduction, and Antibiotic Resistance Development Inhibition Using Janus Electrochemical Membrane Filtration

Li,

Ren

et al. 2023

ACS EST Eng.

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Electrochemical membrane filtration (EMF) technology, which combines the advantages of membrane filtration and electrochemical oxidation, is an effective technology for removing micropollutants from water and wastewater. However, the investigations on antibiotic removal, toxicity reduction, and antibiotic resistance development inhibition in EMF systems are insufficient. In this study, a Janus EMF system using a Fe–Pt Janus electrochemical ceramic membrane was utilized to remove sulfadiazine (SDZ) from synthetic and real surface water. The results showed that a stable removal efficiency of SDZ (63.9%–79.3%) could be achieved with a contact time of 39 s in a 7-day continuous experiment. The toxicity assessment using Vibrio fischeri and Photobacterium phosphoreum revealed that EMF using Na2SO4, NaHCO3, or surface water solution as the matrix could stably reduce toxicity, while EMF in NaCl solution dramatically increased the permeate toxicity. The change in toxicity could be attributed to the reduction of SDZ as well as the generation of different degradation products. Furthermore, exposure experiments demonstrated that the EMF could alleviate the development of antibiotic-resistant genes revealed by three model microbiotas (activated sludge, farmland soil, and mice gut). Our results highlight that the EMF system has a great potential for antibiotic removal, toxicity reduction, and antibiotic resistance development inhibition.

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Ceramic membrane filtration of water samples from Ain Fayda Lake and cement factory (Al‐Ain), United Arab Emirates

Saibi,

Arata,

Kazuyuki

et al. 2023

Env Prog and Sustain Energy

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This article presents a Ceramic Membrane‐based Produced Water Treatment Technology and its application to water samples from Al‐Ain (Abu Dhabi Emirate, United Arab Emirates). The samples were collected during the summer of 2022 from Ain Fayda (lake water) and Al‐Ain cement factory (groundwater). This study investigates the effectiveness of the ceramic membrane for treating water samples and removing solid particles. A dead‐end filtration mode with a filtration flux of 3 m3/m2/d was used. For the Ain Fayda Lake water sample, the transmembrane pressure during filtration reached 120 kPa (temperature adjusted to 25°C); air blowing was used to reduce the transmembrane pressure to around 70 kPa and Total Suspended Solids were reduced from 1.4 to <1 mg/L during 160 min of filtration. For the Al‐Ain cement factory water sample, the transmembrane pressure during filtration reached 160 kPa (temperature adjusted to 25°C); air blowing reduced the transmembrane pressure to around 65 kPa and the Total Suspended Solids from 9.1 to <1 mg/L during 130 min of filtration. Both water samples belong to the Na‐Cl water type. Overall, this work shows the effectiveness of the Ceramic Membrane‐based Produced Water Treatment Technology for reducing Total Suspended Solids in sampled waters; thus, we recommend this approach for treating surface waters in Al‐Ain to improve the environment and possible usage in agriculture.

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Efficient removal of micropollutants from low-conductance surface water using an electrochemical Janus ceramic membrane filtration system

Cited by 37 publications

References 43 publications

Synergies of the Direct Electrochemical Reduction and Pd-Catalyzed Hydrogenation in a Sequential Membrane for an Efficient N-Nitrosodimethylamine Removal

Synergies of the Direct Electrochemical Reduction and Pd-Catalyzed Hydrogenation in a Sequential Membrane for an Efficient N-Nitrosodimethylamine Removal

Antibiotic Removal, Toxicity Reduction, and Antibiotic Resistance Development Inhibition Using Janus Electrochemical Membrane Filtration

Ceramic membrane filtration of water samples from Ain Fayda Lake and cement factory (Al‐Ain), United Arab Emirates

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