1
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Li H, Zhang B, Wu Y. Highly efficient removal of emulsified oil from oily wastewater by microfiltration carbon membranes made from phenolic resin/coal. ENVIRONMENTAL TECHNOLOGY 2024; 45:3692-3705. [PMID: 37326284 DOI: 10.1080/09593330.2023.2226881] [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: 05/03/2023] [Accepted: 06/04/2023] [Indexed: 06/17/2023]
Abstract
Oily wastewater treatment is a major problem for a large variety of industrial sectors. Membrane filtration is quite promising for oil-in-water emulsion treatment by virtue of numerous eminent advantages. Here, microfiltration carbon membranes (MCMs) were prepared by the blends of phenolic resin (PR)/coal as precursor materials for efficient removal of emulsified oil from oily wastewater. The functional groups, porous structure, microstructure, morphology and hydrophilicity of the MCMs were analysed by Fourier transform infrared spectroscopy, bubble-pressure method, X-ray diffraction, scanning electron microscope and water contact angle, respectively. The effect of coal amount in precursor materials on the structure and properties of MCMs was mainly investigated. Under operation at 0.02 MPa for trans-membrane pressure and 6 mL min-1 for feed flowrate, the optimal oil rejection and water permeation flux are correspondingly attained to 99.1% and 21,388.5 kg m-2 h-1 MPa-1 for MCMs made by the precursor containing 25% coal. Besides, the anti-fouling ability of the as-prepared MCMs is greatly improved in comparison with the one merely made by PR. In summary, the result indicates that the as-prepared MCMs are very promising for oily wastewater treatment.
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Affiliation(s)
- Hongchao Li
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, People's Republic of China
| | - Bing Zhang
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, People's Republic of China
| | - Yonghong Wu
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, People's Republic of China
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2
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Miao R, Ran H, Yang Y, Li Y, Ma Z, Lv Y, Meng X, He M, Wang L. In situ acid production by organic matter induced with trace homogeneous Fenton reagent for membrane fouling control. WATER RESEARCH 2024; 258:121752. [PMID: 38761591 DOI: 10.1016/j.watres.2024.121752] [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: 12/05/2023] [Revised: 05/05/2024] [Accepted: 05/06/2024] [Indexed: 05/20/2024]
Abstract
The homogeneous Fenton process involves both coagulation and oxidation, but it requires added acidity, so it is rarely used to control membrane fouling. This work found that the pH of neutral simulated wastewater sharply declined to 4.1 after pre-treatment with 0.1 mM Fenton reagent (Fe2+:H2O2=1:1) without added acidity. This occurred mainly because the trace homogeneous Fenton reagent induced in situ acid production by organic matter in the wastewater, which supplied the acidic conditions required for the Fenton reaction and ensured that the reaction could proceed continuously. Then, oxidation during the pre-Fenton process enhanced the electrostatic repulsion forces and effectively weakened the hydrogen bonds of organic matter at the membrane surface by altering the net charge and hydroxyl content of organic matter, while coagulation caused the foulants to gather and form large aggregates. These changes diminished the deposition of foulants onto the membrane surface and resulted in a looser fouling layer, which eventually caused the membrane fouling rate to decline from 83 % to 24 % and the flux recovery rate to increase from 44 % to 98 % during 2 h of filtration. This membrane fouling mitigation ability is much superior to that of pre-H2O2, pre-Fe2+ or pre-Fe3+ processes with equivalent doses.
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Affiliation(s)
- Rui Miao
- Key Laboratory of Membrane Separation of Shaanxi Province, Key Laboratory of Northwest Water Resources, Key Laboratory of Environmental Engineering of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China; Research Institute of Membrane Separation Technology of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China
| | - Haoxue Ran
- Key Laboratory of Membrane Separation of Shaanxi Province, Key Laboratory of Northwest Water Resources, Key Laboratory of Environmental Engineering of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China
| | - Yifan Yang
- Key Laboratory of Membrane Separation of Shaanxi Province, Key Laboratory of Northwest Water Resources, Key Laboratory of Environmental Engineering of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China
| | - Yanfei Li
- Key Laboratory of Membrane Separation of Shaanxi Province, Key Laboratory of Northwest Water Resources, Key Laboratory of Environmental Engineering of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China
| | - Zhuowen Ma
- Key Laboratory of Membrane Separation of Shaanxi Province, Key Laboratory of Northwest Water Resources, Key Laboratory of Environmental Engineering of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China
| | - Yongtao Lv
- Key Laboratory of Membrane Separation of Shaanxi Province, Key Laboratory of Northwest Water Resources, Key Laboratory of Environmental Engineering of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China; Research Institute of Membrane Separation Technology of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China
| | - Xiaorong Meng
- Key Laboratory of Membrane Separation of Shaanxi Province, Key Laboratory of Northwest Water Resources, Key Laboratory of Environmental Engineering of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China; Research Institute of Membrane Separation Technology of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China
| | - Miaolu He
- Key Laboratory of Membrane Separation of Shaanxi Province, Key Laboratory of Northwest Water Resources, Key Laboratory of Environmental Engineering of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China; Research Institute of Membrane Separation Technology of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China
| | - Lei Wang
- Key Laboratory of Membrane Separation of Shaanxi Province, Key Laboratory of Northwest Water Resources, Key Laboratory of Environmental Engineering of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China; Research Institute of Membrane Separation Technology of Shaanxi Province, Xi'an University of Architecture and Technology, Yan Ta Road No. 13, Xi'an 710055, China.
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3
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Wang D, Huang H, Min F, Li Y, Zhou W, Gao Y, Xie G, Huang Z, Dong Z, Chu Z. Antigravity Autonomous Superwettable Pumps for Spontaneous Separation of Oil-Water Emulsions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402946. [PMID: 38881253 DOI: 10.1002/smll.202402946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 05/24/2024] [Indexed: 06/18/2024]
Abstract
Oil-water separation based on superwettable materials offers a promising way for the treatment of oil-water mixtures and emulsions. Nevertheless, such separation techniques often require complex devices and external energy input. Therefore, it remains a great challenge to separate oil-water mixtures and emulsions through an energy-efficient, economical, and sustainable way. Here, a novel approach demonstrating the successful separation of oil-water emulsions using antigravity-driven autonomous superwettable pumps is presented. By transitioning from traditional gravity-driven to antigravity-driven separation, the study showcases the unprecedented success in purifying oil/water from emulsions by capillary/siphon-driven superwettable autonomous pumps. These pumps, composed of self-organized interconnected channels formed by the packing of superhydrophobic and superhydrophilic sand particles, exhibit outstanding separation flux, efficiency, and recyclability. The findings of this study not only open up a new avenue for oil-water emulsion separation but also hold promise for profound impacts in the field.
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Affiliation(s)
- Deqi Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Haikang Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Fan Min
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
- Greater Bay Area Institute for Innovation, Hunan University, Guangzhou, 511300, China
| | - Yixuan Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Wenting Zhou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Yifeng Gao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Ganhua Xie
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Zhongyuan Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Zhichao Dong
- CAS Key Laboratory of Bio-inspired Materials and Interfacial Sciences, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Zonglin Chu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
- Greater Bay Area Institute for Innovation, Hunan University, Guangzhou, 511300, China
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4
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Liu Y, Meng Z, Zou R, Zhu L, Wang X, Zhu M. Crosslinking and fluorination reinforced PTFE nanofibrous membrane with excellent amphiphobic performance for low-scaling membrane distillations. WATER RESEARCH 2024; 256:121594. [PMID: 38615603 DOI: 10.1016/j.watres.2024.121594] [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: 01/11/2024] [Revised: 04/06/2024] [Accepted: 04/08/2024] [Indexed: 04/16/2024]
Abstract
Membrane distillation (MD) has emerged as a promising technology for desalination and concentration of hypersaline brine. However, the efficient preparation of a structurally stable and salinity-resistant membrane remains a significant challenge. In this study, an amphiphobic polytetrafluoroethylene nanofibrous membrane (PTFE NFM) with exceptional resistance to scaling has been developed, using an energy-efficient method. This innovative approach avoids the high-temperature sintering treatment, only involving electrospinning with PTFE/PVA emulsion and subsequent low-temperature crosslinking and fluorination. The impact of the PVA and PTFE contents, as well as the crosslinking and subsequent fluorination on the morphology and MD performance of the NFM, were systematically investigated. The optimized PTFE NFM displayed robust amphiphobicity, boasting a water contact angle of 155.2º and an oil contact angle of 132.7º. Moreover, the PTFE NFM exhibited stable steam flux of 52.1 L·m-2·h-1 and 26.7 L·m-2·h-1 when fed with 3.5 wt % and 25.0 wt % NaCl solutions, respectively, and an excellent salt rejection performance (99.99 %, ΔT = 60 °C) in a continuous operation for 24 h, showing exceptional anti-scaling performance. It also exhibited stable anti-wetting and anti-fouling properties against surfactants (sodium dodecyl sulfate) and hydrophobic contaminants (diesel oil). These results underscore the significant potential of the PTFE nanofibrous membrane for practical applications in desalination, especially in hypersaline or polluted aqueous environments.
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Affiliation(s)
- Yuan Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Zheyi Meng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China; Qingyuan Innovation Laboratory, Quanzhou 362801, China.
| | - Rujia Zou
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Liping Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China; Qingyuan Innovation Laboratory, Quanzhou 362801, China.
| | - Xuefen Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Meifang Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
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5
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Chen Y, Nan J. Magnetic nanoparticle loading and application of weak magnetic field to reconstruct the cake layer of coagulation-ultrafiltration process to achieve efficient antifouling: Performance and mechanism analysis. WATER RESEARCH 2024; 254:121435. [PMID: 38461605 DOI: 10.1016/j.watres.2024.121435] [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: 12/15/2023] [Revised: 01/29/2024] [Accepted: 03/05/2024] [Indexed: 03/12/2024]
Abstract
Abandoning the costly development of new membrane materials and instead directly remodeling the naturally occurring cake layer constitutes a dynamic, low-cost, long-lasting, and proactive strategy to "fight fouling with fouling". Several optimization strategies, including coagulation/modified magnetic seed loading and applying a weak magnetic force (0.01T) at the ultrafiltration end, improved the anti-fouling, retention, and sieving performances of conventional ultrafiltration process during the treatment of source water having complex natural organic matter (NOMs) and small molecule micropollutants. Two modified magnetic seeds we prepared were composite nano-seed particles (Fe3O4@SiO2-NH2 (FS) and Fe3O4@SiO2@PAMAM-NH2 (FSP)). Aim of the study was to regulate the formation of cake layer via comprehensive testing of the antifouling properties of optimized processes and related mechanistic studies. It was found to be essential to enhance the interception of xanthate and tryptophan proteins in the cake layer for improving the anti-fouling performance based on the correlation and redundancy analyses, while the use of modified magnetic seeds and magnetic field showed a significant positive impact on water production. Blockage modeling demonstrated the ability to form a mature cake layer during the initial filtration stage swiftly. This mitigated the risk of irreversible fouling caused by pore blockage during the early stage of coagulation-ultrafiltration. Morphologically, the reconstructed cake layer exhibited elevated surface porosity, an internal cavity channel structure, and enhanced roughness that can promote increased water flux and retention of water impurities. These optimized the maturity of the cake layer in both time and space. Density Functional Theory (DFT), Extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory, and Modified Extended Derjaguin-Landau-Verwey-Overbeek (MDLVO) calculations indicated aggregation behavior of matter on the cake layer to be enhanced effectively due to magnetic seed loading. This is mainly due to the strengthening of polar interactions, including hydrogen bonding, π-π* conjugation, etc., which can happen between the cake layer loaded with FSP and the organic matter. Under the influence of a magnetic field, magnetic force energy (VMF) significantly impacts the system by eliminating energy barriers. This research will provide innovative strategies for effectively purifying intricate source water through ultrafiltration while controlling membrane fouling.
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Affiliation(s)
- Yunxuan Chen
- Skate Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Jun Nan
- Skate Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
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6
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Wang Z, Shao Y, Wang T, Zhang J, Cui Z, Guo J, Li S, Chen Y. Janus Membranes with Asymmetric Superwettability for High-Performance and Long-Term On-Demand Oil/Water Emulsion Separation. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38476008 DOI: 10.1021/acsami.4c00007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
Current single-function superwettable materials are typically designed for either oil removal or water removal and are constrained by oil density, limiting their widespread applications. Janus membranes with opposite wettability on their two surfaces have recently emerged and present attractive opportunities for on-demand oil/water emulsion separation. Here, a combination strategy is introduced to prepare a Janus membrane with asymmetric superwettability for switchable oil/water emulsion separation. A mussel-inspired asymmetric interface introduction cooperating with the sequence-confined surface modification not only brings about an asymmetric superwettability Janus interface but also guarantees an outstanding stable interface and remarkable chemical stability surfaces. Specifically, the superhydrophilic surface with underwater superoleophobicity can separate surfactant-stabilized oil-in-water emulsions. Conversely, other surface displays opposite superhydrophobicity and superoleophilicity to treat surfactant-stabilized water-in-oil emulsions. Significantly, this superwettable Janus membrane presents superior long-term on-demand oil/water emulsion separation without obvious flux decline and high recovery ability because of its superwettability and superior stability. Furthermore, the asymmetric superwettability enhances the interfacial floatability at air-water interfaces, enabling the design of advanced interfacial materials. The as-prepared superwettable Janus membrane has established a cooperated separation system, overcoming the monotony of conventional superwettable membranes and expanding the application of these specialized membranes to oily wastewater treatment.
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Affiliation(s)
- Zhecun Wang
- College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, PR China
| | - Yubing Shao
- College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, PR China
| | - Tianyi Wang
- College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, PR China
| | - Jinghan Zhang
- College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, PR China
| | - Zhanyuan Cui
- College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, PR China
| | - Jing Guo
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
- University of Science and Technology of China, Hefei 230026, PR China
| | - Shenghai Li
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
- University of Science and Technology of China, Hefei 230026, PR China
| | - Yaohan Chen
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
- University of Science and Technology of China, Hefei 230026, PR China
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7
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Zhang H, Wang F, Guo Z. The antifouling mechanism and application of bio-inspired superwetting surfaces with effective antifouling performance. Adv Colloid Interface Sci 2024; 325:103097. [PMID: 38330881 DOI: 10.1016/j.cis.2024.103097] [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: 10/29/2023] [Revised: 01/14/2024] [Accepted: 01/28/2024] [Indexed: 02/10/2024]
Abstract
With the rapid development of industries, the issue of pollution on Earth has become increasingly severe. This has led to the deterioration of various surfaces, rendering them ineffective for their intended purposes. Examples of such surfaces include oil rigs, seawater intakes, and more. A variety of functional surface techniques have been created to address these issues, including superwetting surfaces, antifouling coatings, nano-polymer composite materials, etc. They primarily exploit the membrane's surface properties and hydration layer to improve the antifouling property. In recent years, biomimetic superwetting surfaces with non-toxic and environmental characteristics have garnered massive attention, greatly aiding in solving the problem of pollution. In this work, a detailed presentation of antifouling superwetting materials was made, including superhydrophobic surface, superhydrophilic surface, and superhydrophilic/underwater superoleophobic surface, along with the antifouling mechanisms. Then, the applications of the superwetting antifouling materials in antifouling domain were addressed in depth.
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Affiliation(s)
- Huayang Zhang
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Hubei University, Wuhan 430062, China
| | - Fengyi Wang
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Hubei University, Wuhan 430062, China; School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
| | - Zhiguang Guo
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Hubei University, Wuhan 430062, China; State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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8
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Bhat IM, Lone S. Hydrothermal and Laser-Guided Janus Membrane with Dual Wettability for Unidirectional Oil/Water Separation. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38407994 DOI: 10.1021/acsami.3c18059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
The development of a Janus membrane with contrasting chemical functionality/or wettability on opposite faces has shown great promise as a passive and energy-efficient oil/water separation technology. Notably, one side of the membrane is designed hydrophilic (i.e., water-attracting in air and underwater oleophobic) and the other hydrophobic (i.e., water-repelling in air and underwater oleophilic). The distinctive surface wettability features of the membrane allow it to repel water and attract oil without consuming energy, thus making it an attractive technology for passively separating oil/water mixtures. The hydrophobic face of the membrane captures oil droplets while allowing water to pass through, and the hydrophilic side attracts water droplets and allows oil to pass. Nonetheless, crafting a Janus membrane is complex, tedious, and expensive. To overcome these limitations, an easy and inexpensive two-step fabrication process for the Janus membrane is proposed in this work. The first step involves creating a superhydrophilic face by the hydrothermally guided deposition of nanoneedles on either side of a commercially available hydrophobic carbon sheet. In the second step, the double-faced surface is subjected to a pulsed laser to create conical micropores studied for oil/water separation. The fabricated membrane is economically affordable and environment friendly. Besides being energy-efficient (as the separation process works passively), the membrane demonstrates an efficient oil/water separating performance. The potential application of this work is diverse and impactful, encompassing wastewater treatment, oil spill cleanup, and various industrial separation processes.
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Affiliation(s)
- Irfan Majeed Bhat
- Department of Chemistry, National Institute of Technology (NIT), Jammu and Kashmir, Srinagar 190006, India
- iDREAM (Interdisciplinary Division for Renewable Energy & Advanced Materials), Laboratory for Bioinspired Research on Advanced Interface and Nanomaterials (BRAINS), NIT, Jammu and Kashmir, Srinagar 190006, India
| | - Saifullah Lone
- Department of Chemistry, National Institute of Technology (NIT), Jammu and Kashmir, Srinagar 190006, India
- iDREAM (Interdisciplinary Division for Renewable Energy & Advanced Materials), Laboratory for Bioinspired Research on Advanced Interface and Nanomaterials (BRAINS), NIT, Jammu and Kashmir, Srinagar 190006, India
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9
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Meng J, Sheng T, Zhou X, Huang Q, He F, Li Y, Wang Z. Facilely and efficiently constructing anti-oil-fouling zwitterionic coatings on membranes for oil-in-water emulsion separation. Chem Commun (Camb) 2024; 60:1766-1769. [PMID: 38252023 DOI: 10.1039/d3cc05732a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
A facile and efficient strategy for constructing anti-oil-fouling zwitterionic coatings on membranes is developed. The resultant membrane exhibits excellent anti-oil-fouling ability even in a dry state, and has a high efficiency for emulsion separation with a high flux of 5800 L m-2 h-1 bar-1 and an oil rejection of up to 99.6%.
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Affiliation(s)
- Jinxuan Meng
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
| | - Tong Sheng
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
| | - Xue Zhou
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
| | - Qiong Huang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
| | - Fang He
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
| | - Yuexiang Li
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
| | - Zhenxing Wang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China.
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10
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Jiao L, Wei W, Liao CY, Wei YH, Lei FH, Li W. Quaternary ammonium-functionalized rosin-derived resin for the high-performance capture of caramels: Experiments and quantum chemical theory simulations. JOURNAL OF HAZARDOUS MATERIALS 2024; 461:132633. [PMID: 37776775 DOI: 10.1016/j.jhazmat.2023.132633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 09/15/2023] [Accepted: 09/24/2023] [Indexed: 10/02/2023]
Abstract
Water contamination caused by discharge of spent washes containing colorants remains controversial. In this study, rosin-derived strongly basic macroporous anion-adsorption resin (RSBMAR) was designed as an advanced adsorbent for scavenging caramel, the most recalcitrant colorant in spent washes. Toxicity tests suggest that RSBMAR is environmentally friendly and hardly threatens aquatic organisms. RSBMAR exhibits outstanding caramel capture efficiency because of its rich target quaternary ammonium (-R4N+) and protonated tertiary amine (-R3NH+) groups, abundant porous structure, large specific surface area, excellent thermal stability, and good sphericity. The caramel adsorption capacity of RSBMAR was 165.86 mg/g and the decolorization efficiency reached 96.75%. After five cycles, the spent RSBMAR maintained a high decolorization rate, indicating excellent renewability. Multiple characterizations indicated that caramel capture was largely mediated by charge interaction between -R4N+/-R3NH+ (RSBMAR) and -RCOO-/-RCOOH (caramel), followed by H-bonds. Quantum chemical theory simulations, including electrostatic potential, local ionization energy, frontier molecular orbitals, and independent gradient model analyses, further visualized caramel capture mechanisms at atomic level. Hirshfeld surface analysis revealed that RSBMAR acts as both an H-bond donor and acceptor during caramel uptake. Dynamic adsorption was performed to treat real wastewater, laying the foundation for the industrial application of RSBMAR.
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Affiliation(s)
- Li Jiao
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, China
| | - Wei Wei
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, China
| | - Chun-Yu Liao
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, China
| | - Yan-Hong Wei
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, China
| | - Fu-Hou Lei
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, China; Key Laboratory of Chemistry and Engineering of Forest Products (State Ethnic Affairs Commission), Guangxi Minzu University, Nanning, China
| | - Wen Li
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning, China; College of Chemical Engineering, Nanjing Tech University, Nanjing, China.
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11
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Cheng X, Li T, Yan L, Jiao Y, Zhang Y, Wang K, Cheng Z, Ma J, Shao L. Biodegradable electrospinning superhydrophilic nanofiber membranes for ultrafast oil-water separation. SCIENCE ADVANCES 2023; 9:eadh8195. [PMID: 37611103 PMCID: PMC10446487 DOI: 10.1126/sciadv.adh8195] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 07/21/2023] [Indexed: 08/25/2023]
Abstract
Although membrane technology has attracted considerable attention for oily wastewater treatment, the plastic waste generated from discarded membranes presents an immediate challenge for achieving eco-friendly separation. We designed on-demand biodegradable superhydrophilic membranes composed of polylactic acid nanofibers in conjunction with polyethylene oxide hydrogels using electrospinning technology for ultrafast purification of oily water. Our results showed that the use of the polyethylene oxide hydrogels increased the number of hydrogen bonds formed between the membrane surface and water molecules by 357.6%. This converted hydrophobic membranes into superhydrophilic ones, which prevented membrane fouling and accelerated emulsion penetration through the membranes. The oil-in-water emulsion permeance of our newly designed nanofiber membranes increased by 61.9 times (2.1 × 104 liters per square meter per hour per bar) with separation efficiency >99.6%, which was superior to state-of-the-art membranes. Moreover, the formation of hydrogen bonds was found to accelerate polylactic acid biodegradation into lactic acid by over 30%, offering a promising approach for waste membrane treatment.
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Affiliation(s)
- Xiquan Cheng
- State Key Laboratory of Urban Water Resource and Environment, School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, P.R. China
- Shandong Sino-European Membrane Technology Research Institute Co. Ltd., Weihai Key Laboratory of Water Treatment and Membrane Technology, Weihai 264209, P.R. China
| | - Tongyu Li
- State Key Laboratory of Urban Water Resource and Environment, School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, P.R. China
| | - Linlin Yan
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemical Engineering and Technology, State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150001, P.R. China
| | - Yang Jiao
- State Key Laboratory of Urban Water Resource and Environment, School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, P.R. China
| | - Yingjie Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, P.R. China
- Shandong Sino-European Membrane Technology Research Institute Co. Ltd., Weihai Key Laboratory of Water Treatment and Membrane Technology, Weihai 264209, P.R. China
| | - Kai Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, P.R. China
| | - Zhongjun Cheng
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemical Engineering and Technology, State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150001, P.R. China
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Lu Shao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemical Engineering and Technology, State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Harbin 150001, P.R. China
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12
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Dai Q, Li D, Sun Y, Wang H, Lu Y, Yang D. Low temperature-resistant superhydrophobic and elastic cellulose aerogels derived from seaweed solid waste as efficient oil traps for oil/water separation. CHEMOSPHERE 2023; 336:139179. [PMID: 37330065 DOI: 10.1016/j.chemosphere.2023.139179] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 06/07/2023] [Accepted: 06/08/2023] [Indexed: 06/19/2023]
Abstract
Aerogel has excellent application potential in adsorption, heat preservation, and other areas due to its typical advantages of low density and high porosity. However, there are several issues with the use of aerogel in oil/water separation, including weak mechanical qualities and challenges in eliminating organic contaminants at low temperature. Inspired by cellulose Iα, which has excellent performance at low temperature, this study used cellulose Iα nanofibers extracted from seaweed solid waste as the skeleton, through covalent cross-linked with ethylene imine polymer (PEI) and hydrophobic modification of 1, 4-phenyl diisocyanate (MDI), supplemented by freeze-drying technology to form three-dimensional sheet, and successfully obtained cellulose aerogels derived from seaweed solid waste (SWCA). The compression test shows that the maximum compressive stress of SWCA is 61 kPa, and the initial performance still maintains 82% after 40 cryogenic compression cycles. In addition, the contact angles of water and oil on the surface of the SWCA were 153° and 0°, respectively, and the stable hydrophobic time in simulated seawater is more than 3 h. By combining the elasticity and superhydrophobicity/superoleophilicity, the SWCA with an oil absorption capacity of up to 11-30 times its mass, might be utilized repeatedly for the separation of an oil/water mixture.
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Affiliation(s)
- Qinglin Dai
- State Key Laboratory of Bio-fibers and Eco-textiles, School of Environmental Science and Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao, 266071, China
| | - Daohao Li
- State Key Laboratory of Bio-fibers and Eco-textiles, School of Environmental Science and Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao, 266071, China
| | - Yuanyuan Sun
- State Key Laboratory of Bio-fibers and Eco-textiles, School of Environmental Science and Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao, 266071, China
| | - Hu Wang
- State Key Laboratory of Bio-fibers and Eco-textiles, School of Environmental Science and Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao, 266071, China
| | - Yun Lu
- Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China.
| | - Dongjiang Yang
- State Key Laboratory of Bio-fibers and Eco-textiles, School of Environmental Science and Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao, 266071, China.
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