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Pan Z, Xin H, Xu R, Wang P, Fan X, Song Y, Song C, Wang T. Carbon electrochemical membrane functionalized with flower cluster-like FeOOH catalyst for organic pollutants decontamination. J Colloid Interface Sci 2023; 640:588-599. [PMID: 36878076 DOI: 10.1016/j.jcis.2023.02.135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 02/22/2023] [Accepted: 02/25/2023] [Indexed: 03/06/2023]
Abstract
Decorating active catalysts on the reactive electrochemical membrane (REM) is an effective way to further improve its decontamination performance. In this work, a novel carbon electrochemical membrane (FCM-30) was prepared through coating FeOOH nano catalyst on a low-cost coal-based carbon membrane (CM) through facile and green electrochemical deposition. Structural characterizations demonstrated that the FeOOH catalyst was successfully coated on CM, and it grew into a flower cluster-like morphology with abundant active sites when the deposition time was 30 min. The nano FeOOH flower clusters can obviously boost the hydrophilicity and electrochemical performance of FCM-30, which enhance its permeability and bisphenol A (BPA) removal efficiency during the electrochemical treatment. Effects of applied voltages, flow rates, electrolyte concentrations and water matrixes on BPA removal efficiency were investigated systematically. Under the operation condition of 2.0 V applied voltage and 2.0 mL·min-1 flow rate, FCM-30 can achieve the high removal efficiency of 93.24% and 82.71% for BPA and chemical oxygen demand (COD) (71.01% and 54.89% for CM), respectively, with only a low energy consumption (EC) of 0.41 kWh·kgCOD-1, which can be ascribed to the enhancement on OH yield and direct oxidation ability by the FeOOH catalyst. Moreover, this treatment system also exhibits good reusability and can be adopted on different water background as well as different pollutants.
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Affiliation(s)
- Zonglin Pan
- College of Environmental Science and Engineering, Dalian Maritime University, 1, Linghai Road, Dalian 116026, China
| | - Hong Xin
- College of Environmental Science and Engineering, Dalian Maritime University, 1, Linghai Road, Dalian 116026, China
| | - Ruisong Xu
- School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian 116024, China.
| | - Pengcheng Wang
- Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA
| | - Xinfei Fan
- College of Environmental Science and Engineering, Dalian Maritime University, 1, Linghai Road, Dalian 116026, China
| | - Yongxin Song
- Department of Marine Engineering, Dalian Maritime University, 1, Linghai Road, Dalian 116026, China
| | - Chengwen Song
- College of Environmental Science and Engineering, Dalian Maritime University, 1, Linghai Road, Dalian 116026, China.
| | - Tonghua Wang
- College of Environmental Science and Engineering, Dalian Maritime University, 1, Linghai Road, Dalian 116026, China; School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian 116024, China.
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Lv P, Shang Y, Zhang Y, Wang W, Liu Y, Su D, Wang W, Li C, Ma C, Yang C. Structural basis for the arsenite binding and translocation of Acr3 antiporter with NhaA folding pattern. FASEB J 2022; 36:e22659. [PMID: 36394534 DOI: 10.1096/fj.202201280r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 10/05/2022] [Accepted: 11/07/2022] [Indexed: 11/18/2022]
Abstract
The arsenical resistance-3 (ACR3) family constitutes the most common pathway that confers high-level resistance to toxic metalloids in various microorganisms and lower plants. Based on the structural model constructed by AlphaFold2, the Acr3 antiporter from Bacillus subtilis (Acr3Bs ) exhibits a typical NhaA structure fold, with two discontinuous helices of transmembrane (TM) segments, TM4 and TM9, interacting with each other and forming an X-shaped structure. As the structural information available for these important arsenite-efflux pumps is limited, we investigated the evolutionary conservation among 300 homolog sequences and identified three conserved motifs in both the discontinuous helices and TM5. Through site-directed mutagenesis, microscale thermophoresis (MST), and fluorescence resonance energy transfer (FRET) analyses, the identified Motif C in TM9 was found to be a critical element for substrate binding, in which N292 and E295 are involved in substrate coordination, while R118 in TM4 and E322 in TM10 is responsible for structural stabilization. In addition, the highly conserved residues on Motif B of TM5 are potentially key factors in the protonation/deprotonation process. These consensus motifs and residues are essential for metalloid compound translocation of Acr3 antiporters, by framing the core domain and the typical X-shaped of NhaA fold.
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Affiliation(s)
- Peiwen Lv
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, P.R. China
| | - Yan Shang
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, P.R. China
| | - Ye Zhang
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, P.R. China
| | - Wenkai Wang
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, P.R. China
| | - Yuanxiang Liu
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, P.R. China
| | - Dandan Su
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, P.R. China
| | - Wei Wang
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, P.R. China
| | - Chunfang Li
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, P.R. China
| | - Cuiqing Ma
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, P.R. China
| | - Chunyu Yang
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, P.R. China
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Yang Y, Zhang Z, Li Y, Wang R, Xu Z, Jin C, Jin G. The catalytic aerial oxidation of As(III) in alkaline solution by Mn-loaded diatomite. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 317:115380. [PMID: 35636115 DOI: 10.1016/j.jenvman.2022.115380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 05/19/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
The oxidization of As(III) to As(V) is necessary for both the detoxification of arsenic and the removal of arsenic by solidification. In order to achieve high efficiency and low cost As(III) oxidation, a novel process of catalytic aerial oxidation of As(III) is proposed, using air as oxidant and Mn-loaded diatomite as a catalyst. Through systematic characterization of the reaction products, the catalytic oxidation reaction law of Mn-loaded diatomite for As(III) was found out, and its reaction mechanism was revealed. Results show that Mn-loaded diatomite achieved a good catalytic effect for aerial oxidation of As(III) and maintained high performance over multiple cycles of reuse, which was directly related to the structure of diatomite and the behavior of manganese. Under the conditions of a catalyst concentration of 20 g/L, an air flow rate of 0.3 m3/h, a reaction temperature of 50 °C and an initial pH of 12.6, 96.04% As(III) oxidation was achieved after 3 h. Furthermore, the efficiency of As(III) oxidation did not change significantly after ten cycles of reuse. XPS analysis of the reaction products confirmed that the surface of the catalyst was rich in Mn(III), Mn(IV) and adsorbed oxygen(O-H), which was the fundamental reason for the excellent performance of Mn-loaded diatomite in the catalytic oxidation of As(III).
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Affiliation(s)
- Yudong Yang
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Zhongtang Zhang
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Yuhu Li
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China.
| | - Ruixiang Wang
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Zhifeng Xu
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Chengyong Jin
- Hsikwang Shan Twinkling Star CO., LTD., Lengshui Jiang, 417500, China
| | - Guizhong Jin
- Hsikwang Shan Twinkling Star CO., LTD., Lengshui Jiang, 417500, China
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Mo Y, Zhang L, Zhao X, Li J, Wang L. A critical review on classifications, characteristics, and applications of electrically conductive membranes for toxic pollutant removal from water: Comparison between composite and inorganic electrically conductive membranes. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129162. [PMID: 35643008 DOI: 10.1016/j.jhazmat.2022.129162] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 04/23/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
Research efforts have recently been directed at developing electrically conductive membranes (EMs) for pressure-driven membrane separation processes to remove effectively the highly toxic pollutants from water. EMs serve as both the filter and the electrode during filtration. With the assistance of a power supply, EMs can considerably improve the toxic pollutant removal efficiency and even realize chemical degradation to reduce their toxicity. Organic-inorganic composite EMs and inorganic EMs show remarkable differences in characteristics, removal mechanisms, and application situations. Understanding their differences is highly important to guide the future design of EMs for specific pollutant removal from water. However, reviews concerning the differences between composite and inorganic EMs are still lacking. In this review, we summarize the classifications, fabrication techniques, and characteristics of composite and inorganic EMs. We also elaborate on the removal mechanisms and performances of EMs toward recalcitrant organic pollutants and toxic inorganic ions in water. The comparison between composite and inorganic EMs is emphasized particularly in terms of the membrane characteristics (pore size, permeability, and electrical conductivity), application situations, and underlying removal mechanisms. Finally, the energy consumption and durability of EMs are evaluated, and future perspectives are presented.
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Affiliation(s)
- Yinghui Mo
- State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Membrane Science and Technology, Tiangong University, Tianjin 300387, PR China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, PR China.
| | - Lu Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Membrane Science and Technology, Tiangong University, Tianjin 300387, PR China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, PR China
| | - Xin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, PR China
| | - Jianxin Li
- State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Membrane Science and Technology, Tiangong University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tiangong University, Tianjin 300387, PR China
| | - Liang Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Membrane Science and Technology, Tiangong University, Tianjin 300387, PR China; School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, PR China
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Abidli A, Huang Y, Ben Rejeb Z, Zaoui A, Park CB. Sustainable and efficient technologies for removal and recovery of toxic and valuable metals from wastewater: Recent progress, challenges, and future perspectives. CHEMOSPHERE 2022; 292:133102. [PMID: 34914948 DOI: 10.1016/j.chemosphere.2021.133102] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 11/08/2021] [Accepted: 11/25/2021] [Indexed: 06/14/2023]
Abstract
Due to their numerous effects on human health and the natural environment, water contamination with heavy metals and metalloids, caused by their extensive use in various technologies and industrial applications, continues to be a huge ecological issue that needs to be urgently tackled. Additionally, within the circular economy management framework, the recovery and recycling of metals-based waste as high value-added products (VAPs) is of great interest, owing to their high cost and the continuous depletion of their reserves and natural sources. This paper reviews the state-of-the-art technologies developed for the removal and recovery of metal pollutants from wastewater by providing an in-depth understanding of their remediation mechanisms, while analyzing and critically discussing the recent key advances regarding these treatment methods, their practical implementation and integration, as well as evaluating their advantages and remaining limitations. Herein, various treatment techniques are covered, including adsorption, reduction/oxidation, ion exchange, membrane separation technologies, solvents extraction, chemical precipitation/co-precipitation, coagulation-flocculation, flotation, and bioremediation. A particular emphasis is placed on full recovery of the captured metal pollutants in various reusable forms as metal-based VAPs, mainly as solid precipitates, which is a powerful tool that offers substantial enhancement of the remediation processes' sustainability and cost-effectiveness. At the end, we have identified some prospective research directions for future work on this topic, while presenting some recommendations that can promote sustainability and economic feasibility of the existing treatment technologies.
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Affiliation(s)
- Abdelnasser Abidli
- Microcellular Plastics Manufacturing Laboratory (MPML), Department of Mechanical and Industrial Engineering, Faculty of Applied Science and Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, M5S 3G8, Canada; Institute for Water Innovation (IWI), Faculty of Applied Science and Engineering, University of Toronto, 55 St. George Street, Toronto, Ontario, M5S 1A4, Canada.
| | - Yifeng Huang
- Microcellular Plastics Manufacturing Laboratory (MPML), Department of Mechanical and Industrial Engineering, Faculty of Applied Science and Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, M5S 3G8, Canada; Institute for Water Innovation (IWI), Faculty of Applied Science and Engineering, University of Toronto, 55 St. George Street, Toronto, Ontario, M5S 1A4, Canada; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang, China
| | - Zeineb Ben Rejeb
- Microcellular Plastics Manufacturing Laboratory (MPML), Department of Mechanical and Industrial Engineering, Faculty of Applied Science and Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, M5S 3G8, Canada
| | - Aniss Zaoui
- Microcellular Plastics Manufacturing Laboratory (MPML), Department of Mechanical and Industrial Engineering, Faculty of Applied Science and Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, M5S 3G8, Canada
| | - Chul B Park
- Microcellular Plastics Manufacturing Laboratory (MPML), Department of Mechanical and Industrial Engineering, Faculty of Applied Science and Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, M5S 3G8, Canada; Institute for Water Innovation (IWI), Faculty of Applied Science and Engineering, University of Toronto, 55 St. George Street, Toronto, Ontario, M5S 1A4, Canada.
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