Abstract
Removing high-risk and persistent contaminants from water is challenging, because they typically exist at low concentrations in complex water matrices. Electrified flow-through technologies are viable to overcome the limitations induced by mass transport for efficient contaminant removal. Modifying the local environment of the flow-through electrodes offers opportunities to further improve the reaction kinetics and selectivity for achieving near-complete removal of these contaminants from water. Here, we present state-of-the-art local environment modification approaches that can be incorporated into electrified flow-through technologies to intensify water treatment. We first show methods of nanospace incorporation, local geometry adjustment, and microporous structure optimization that can induce spatial confinement, enhanced local electric field, and microperiodic vortex, respectively, for local environment modification. We then discuss why local environment modification can complement the flow-through electrodes for improving the reaction rate and selectivity. Finally, we outline appropriate scenarios of intensifying electrified flow-through technologies through local environment modification for fit-for-purpose water treatment applications.
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References
Chaplin B P (2019). The prospect of electrochemical technologies advancing worldwide water treatment. Accounts of Chemical Research, 52(3): 596–604
Chen C, Jin H, Wang P, Sun X, Jaroniec M, Zheng Y, Qiao S Z (2024). Local reaction environment in electrocatalysis. Chemical Society Reviews, Advance Article.
Chen Y, Zhang G, Ji Q, Lan H, Liu H, Qu J (2022). Visualization of electrochemically accessible sites in flow-through mode for maximizing available active area toward superior electrocatalytic ammonia oxidation. Environmental Science & Technology, 56(13): 9722–9731
Gao Y, Liang S, Liu B, Jiang C, Xu C, Zhang X, Liang P, Elimelech M, Huang X (2023). Subtle tuning of nanodefects actuates highly efficient electrocatalytic oxidation. Nature Communications, 14(1): 2059
Grommet A B, Feller M, Klajn R (2020). Chemical reactivity under nanoconfinement. Nature Nanotechnology, 15(4): 256–271
Guo D, Liu Y, Ji H, Wang C C, Chen B, Shen C, Li F, Wang Y, Lu P, Liu W (2021). Silicate-enhanced heterogeneous flow-through electro-Fenton system using iron oxides under nanoconfinement. Environmental Science & Technology, 55(6): 4045–4053
Hodges B C, Cates E L, Kim J H (2018). Challenges and prospects of advanced oxidation water treatment processes using catalytic nanomaterials. Nature Nanotechnology, 13(8): 642–650
Huo Z, Kim Y J, Chen Y, Song T, Yang Y, Yuan Q, Kim S W (2023). Hybrid energy harvesting systems for self-powered sustainable water purification by harnessing ambient energy. Frontiers of Environmental Science & Engineering, 17(10): 118
Huo Z Y, Du Y, Chen Z, Wu Y H, Hu H Y (2020). Evaluation and prospects of nanomaterial-enabled innovative processes and devices for water disinfection: a state-of-the-art review. Water Research, 173: 115581
Huo Z Y, Kim Y J, Suh I Y, Lee D M, Lee J H, Du Y, Wang S, Yoon H J, Kim S W (2021). Triboelectrification induced self-powered microbial disinfection using nanowire-enhanced localized electric field. Nature Communications, 12(1): 3693
Huo Z Y, Winter L R, Wang X, Du Y, Wu Y H, Hübner U, Hu H Y, Elimelech M (2022). Synergistic nanowire-enhanced electroporation and electrochlorination for highly efficient water disinfection. Environmental Science & Technology, 56(15): 10925–10934
Huo Z Y, Xie X, Yu T, Lu Y, Feng C, Hu H Y (2016). Nanowire-modified three-dimensional electrode enabling low-voltage electroporation for water disinfection. Environmental Science & Technology, 50(14): 7641–7649
Jin L, Ren Y, Zheng W, Pan F, You S, Liu Y (2023). Surface engineering of electrified MXene filter for enhanced phosphate removal. ACS ES&T Engineering, 3(12): 2243–2251
Kang Y, Gu Z, Ma B, Zhang W, Sun J, Huang X, Hu C, Choi W, Qu J (2023). Unveiling the spatially confined oxidation processes in reactive electrochemical membranes. Nature Communications, 14(1): 6590
Liu M, Pang Y, Zhang B, De Luna P, Voznyy O, Xu J, Zheng X, Dinh C T, Fan F, Cao C, et al. (2016). Enhanced electrocatalytic CO2 reduction via field-induced reagent concentration. Nature, 537(7620): 382–386
Liu T, Xiao S, Li N, Chen J, Zhou X, Qian Y, Huang C H, Zhang Y (2023). Water decontamination via nonradical process by nanoconfined Fenton-like catalysts. Nature Communications, 14(1): 2881
Liu Y, Gao G, Vecitis C D (2020). Prospects of an electroactive carbon nanotube membrane toward environmental applications. Accounts of Chemical Research, 53(12): 2892–2902
Meng C, Ding B, Zhang S, Cui L, Ostrikov K K, Huang Z, Yang B, Kim J H, Zhang Z (2022). Angstrom-confined catalytic water purification within Co-TiOx laminar membrane nanochannels. Nature Communications, 13(1): 4010
Miklos D B, Remy C, Jekel M, Linden K G, Drewes J E, Hübner U (2018). Evaluation of advanced oxidation processes for water and wastewater treatment: a critical review. Water Research, 139: 118–131
Pei S, Wang Y, You S, Li Z, Ren N (2022). Electrochemical removal of chlorophenol pollutants by reactive electrode membranes: scale-up strategy for engineered applications. Engineering (Beijing), 9: 77–84
Qian J, Gao X, Pan B (2020). Nanoconfinement-mediated water treatment: From fundamental to application. Environmental Science & Technology, 54(14): 8509–8526
Rahimi M, Straub A P, Zhang F, Zhu X, Elimelech M, Gorski C A, Logan B E (2018). Emerging electrochemical and membrane-based systems to convert low-grade heat to electricity. Energy & Environmental Science, 11(2): 276–285
Sun M, Wang X, Winter L R, Zhao Y, Ma W, Hedtke T, Kim J H, Elimelech M (2021). Electrified membranes for water treatment applications. ACS ES&T Engineering, 1(4): 725–752
Sun Y, Bai S, Wang X, Ren N, You S (2023). Prospective life cycle assessment for the electrochemical oxidation wastewater treatment process: from laboratory to industrial scale. Environmental Science & Technology, 57(3): 1456–1466
Wang X, Sun M, Zhao Y, Wang C, Ma W, Wong M S, Elimelech M (2020). In situ electrochemical generation of reactive chlorine species for efficient ultrafiltration membrane self-cleaning. Environmental Science & Technology, 54(11): 6997–7007
Wang X, Wu X, Ma W, Zhou X, Zhang S, Huang D, Winter L R, Kim J H, Elimelech M (2023). Free-standing membrane incorporating single-atom catalysts for ultrafast electroreduction of low-concentration nitrate. Proceedings of the National Academy of Sciences of the United States of America, 120(11): e2217703120
Xia Q, Chen C, Yao Y, Li J, He S, Zhou Y, Li T, Pan X, Yao Y, Hu L (2021). A strong, biodegradable and recyclable lignocellulosic bioplastic. Nature Sustainability, 4(7): 627–635
Yang K, Zhang X, Zu D, Zhou H, Ma J, Yang Z (2023). Shifting emphasis from electro- to catalytically active sites: Effects of pore size of flow-through anodes on water purification. Environmental Science & Technology, 57(48): 20421–20430
Yang Z, Qian J, Yu A, Pan B (2019). Singlet oxygen mediated iron-based Fenton-like catalysis under nanoconfinement. Proceedings of the National Academy of Sciences of the United States of America, 116(14): 6659–6664
Yu Y, Pei S, Zhang J, Ren N, You S (2023). Bio-inspired porous composite electrode for enhanced mass transfer and electrochemical water purification by modifying local flow pattern. Advanced Functional Materials, 33(26): 2214725
Yuan Q, Li P, Liu J, Lin Y, Cai Y, Ye Y, Liang C (2017). Facet-dependent selective adsorption of Mn-doped α-Fe2O3 nanocrystals toward heavy-metal ions. Chemistry of Materials, 29(23): 10198–10205
Yuan Q, Zhang D, Yu P, Sun R, Javed H, Wu G, Alvarez P J J (2020). Selective adsorption and photocatalytic degradation of extracellular antibiotic resistance genes by molecularly-imprinted graphitic carbon nitride. Environmental Science & Technology, 54(7): 4621–4630
Zhao J, Fu C, Ye K, Liang Z, Jiang F, Shen S, Zhao X, Ma L, Shadike Z, Wang X, et al. (2022). Manipulating the oxygen reduction reaction pathway on Pt-coordinated motifs. Nature Communications, 13(1): 685
Zhao Y, Sun M, Wang X, Wang C, Lu D, Ma W, Kube S A, Ma J, Elimelech M (2020). Janus electrocatalytic flow-through membrane enables highly selective singlet oxygen production. Nature Communications, 11(1): 6228
Zhou Y, Ji Q, Liu H, Qu J (2018). Pore structure-dependent mass transport in flow-through electrodes for water remediation. Environmental Science & Technology, 52(13): 7477–7485
Zuo K, Garcia-Segura S, Cerrón-Calle G A, Chen F Y, Tian X, Wang X, Huang X, Wang H, Alvarez P J J, Lou J, et al. (2023). Electrified water treatment: fundamentals and roles of electrode materials. Nature Reviews. Materials, 8(7): 472–490
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Conflict of Interests Zheng-Yang Huo is a youth editorial board member, Xia Huang is an editorial board member, and Menachem Elimelech is an advisory board member of Frontiers of Environmental Science & Engineering. The authors declare that this research was conducted without any commercial or financial relationships that could be construed as a potential conflict of interest.
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Highlights
• Modifying local environment can intensify the performance of flow-through electrodes.
• Reaction rate and selectivity can be improved by local environment modification.
• Modifications include spatial confinement, enhanced local field, and periodic vortex.
• Near-complete removal of low-concentration emerging contaminants can be realized.
• Electrified flow-through systems are promising for fit-for-purpose water treatment.
Zheng-Yang Huo is an Assistant Professor at Renmin University of China (RUC). He has been awarded the prestigious Marie Curie Fellowship from the European Commission, the Young Talent Support Project from the Beijing Association for Science and Technology, and the Outstanding Scholar from RUC. He received his B.S. degree in environmental science from Tongji University in 2014, and his Ph.D. degree in environmental engineering from Tsinghua University in 2019. Before joining RUC, he worked as a research professor at Sungkyunkwan University, funded by the Korea Research Fellowship. Dr. Huo’s research vision is to develop sustainable environmental applications for decentralized applications. He has published 40 papers in leading international peer-reviewed journals, including first and corresponding author papers in Nature Water, Nature Communications, Science Advances, Environmental Science & Technology, and Water Research, with >1500 citations and an H-index of 21. Dr. Huo has received funding from the Chinese National NSF Project and the Chinese National Key R&D Program. He is a Youth Editorial Board Member of the Frontiers of Environmental Science & Engineering.
Xiaoxiong Wang is currently an Assistant Professor at Shenzhen International Graduate School, Tsinghua University (Tsinghua SIGS). He received his B.S. degree in Chemical Engineering from Tsinghua University in 2013 and Ph.D. degree in Environmental Engineering from Tsinghua University in 2018. He completed his postdoctoral training in the Department of Chemical and Environmental Engineering at Yale University in 2022. He then became an Assistant Professor at the Institute for Ocean Engineering and the Center of Double Helix of Tsinghua SIGS in 2023. His research focuses on reactive electrified membranes and flow-through electrodes for water treatment, resource recovery, and renewable energy production. He has published over 40 journal papers with nearly 2000 citations (H-index of 22), including first- and corresponding-authored papers on Nature Nanotechnology, Nature Water, Proceedings of the National Academy of Sciences (PNAS), Environmental Science & Technology, and Water Research. He received numerous awards, representative among which include National Distinguished Young Scholar of China in 2023; Outstanding Graduate of School of Environment at Tsinghua University in 2018; and National Scholarship of China for graduate students in 2016.
Xia Huang is a Professor at School of Environment of Tsinghua University, titled the National Science Fund for Distinguished Young Scholars and the Special Expert of Ministry of Education. Now she is a Director of State Key Joint Laboratory of Environment Simulation and Pollution Control. Her research interests focus on novel wastewater treatment processes coupled with biological, membrane and electrochemical technologies for water, energy and resource recovery. Till now, she has published 5 books, more than 400 journal papers. She is currently the Distinguished Fellow of the International Water Association (IWA) and was Ex-Chair of the IWA Specialist Group on Membrane Technology. She serves as an Editor of Water Research X, and Executive Associate Editor-inChief of Front. Environ. Sci. Eng. She was awarded 2009 Environ. Sci. Technol. Best Paper and 2018 Environ. Sci.: Wat. Res. & Technol. Best Paper, the 2nd Class of the State Science and Technology Progress Award thrice from Chinese Government.
Menachem Elimelech is the Sterling Professor of Chemical and Environmental Engineering at Yale University. His research focuses on membrane-based technologies at the water-energy nexus, materials for next-generation desalination and water purification membranes, and environmental applications of nanomaterials. Professor Elimelech was the recipient of numerous awards in recognition of his research contributions. Notable among these awards are the 2005 Clarke Prize for excellence in water research; election to the US National Academy of Engineering in 2006; Eni Prize for ‘Protection of the Environment’ in 2015; and election to the Chinese Academy of Engineering in 2017, the Australian Academy of Technology and Engineering in 2021, and the Canadian Academy of Engineering in 2022. Professor Elimelech has advised 49 Ph.D. students and 45 postdoctoral researchers, many of whom hold leading positions in academia and industry. In recognition of his excellence in teaching and mentoring, he received the W.M. Keck Foundation Engineering Teaching Excellence Award in 1994, the Yale University Graduate Mentoring Award in 2004, and the Yale University Postdoctoral Mentoring Prize in 2012.
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Huo, ZY., Wang, X., Huang, X. et al. Intensifying electrified flow-through water treatment technologies via local environment modification. Front. Environ. Sci. Eng. 18, 69 (2024). https://doi.org/10.1007/s11783-024-1829-y
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DOI: https://doi.org/10.1007/s11783-024-1829-y