1
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Li X, Zhang G, Hu C, Lan H, Liu H. Demulsification with simultaneous water purification by coupling filtration and enhanced oil droplet coalescence at anode interface in an electrochemical reactor. J Environ Sci (China) 2024; 146:118-126. [PMID: 38969440 DOI: 10.1016/j.jes.2023.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 06/03/2023] [Accepted: 06/10/2023] [Indexed: 07/07/2024]
Abstract
With the increasing demand of recycling disposal of industrial wastewater, oil-in-water (O/W) emulsion has been paid much attention in recent years owing to its high oil content. However, due to the presence of surfactant and salt, the emulsion was usually stable with complex physicochemical interfacial properties leading to increased processing difficulty. Herein, a novel flow-through electrode-based demulsification reactor (FEDR) was well designed for the treatment of saline O/W emulsion. In contrast to 53.7% for electrical demulsification only and 80.3% for filtration only, the COD removal efficiency increased to 92.8% under FEDR system. Moreover, the pore size of electrode and the applied voltage were two key factors that governed the FEDR demulsification performance. By observing the morphology of oil droplets deposited layer after different operation conditions and the behavior of oil droplets at the electrode surface under different voltage conditions, the mechanism was proposed that the oil droplets first accumulated on the surface of flow-through electrode by sieving effect, subsequently the gathered oil droplets could further coalesce with the promoting effect of the anode, leading to a high-performing demulsification. This study offers an attractive option of using flow-through electrode to accomplish the oil recovery with simultaneous water purification.
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Affiliation(s)
- Xi Li
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Gong Zhang
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Chengzhi Hu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Huachun Lan
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Huijuan Liu
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
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2
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Wang Y, Guo Y, Dong P, Lin K, Du P, Cao J, Cheng Y, Cheng F, Yun S, Feng C. Water-in-oil Pickering emulsion using ergosterol as an emulsifier solely. Food Res Int 2024; 186:114374. [PMID: 38729731 DOI: 10.1016/j.foodres.2024.114374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 04/08/2024] [Accepted: 04/17/2024] [Indexed: 05/12/2024]
Abstract
As a crucial component of the fungal cell membranes, ergosterol has been demonstrated to possess surface activity attributed to its hydrophobic region and polar group. However, further investigation is required to explore its emulsification behavior upon migration to the oil-water interface. Therefore, this study was conducted to analyze the interface properties of ergosterol as a stabilizer for water in oil (W/O) emulsion. Moreover, the emulsion prepared under the optimal conditions was utilized to load the water-soluble bioactive substance with the chlorogenic acid as the model molecules. Our results showed that the contact angle of ergosterol was 117.017°, and its dynamic interfacial tension was obviously lower than that of a pure water-oil system. When the ratio of water to oil was 4: 6, and the content of ergosterol was 3.5 % (ergosterol/oil phase, w/w), the W/O emulsion had smaller particle size (438 nm), higher apparent viscosity, and better stability. Meanwhile, the stability of loaded chlorogenic acid was improved under unfavorable conditions (pH 1.2, 90 °C, ultraviolet irradiation, and oxidation), which were 73.87 %, 59.53 %, 62.53 %, and 69.73 %, respectively. Additionally, the bioaccessibility of chlorogenic acid (38.75 %) and ergosterol (33.69 %), and the scavenging rates of the emulsion on DPPH radicals (81.00 %) and hydroxyl radicals (82.30 %) were also enhanced. Therefore, a novel W/O Pickering emulsion was prepared in this work using ergosterol as an emulsifier solely, which has great potential for application in oil-based food and nutraceutical formulations.
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Affiliation(s)
- Yaxin Wang
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China
| | - Yuanhao Guo
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China
| | - Pengfei Dong
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China
| | - Kai Lin
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China
| | - Pengya Du
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China
| | - Jinling Cao
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China; Shanxi Key Laboratory of Edible Fungi for Loess Plateau, Taigu 030801, China
| | - Yanfen Cheng
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China; Shanxi Key Laboratory of Edible Fungi for Loess Plateau, Taigu 030801, China
| | - Feier Cheng
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China; Shanxi Key Laboratory of Edible Fungi for Loess Plateau, Taigu 030801, China
| | - Shaojun Yun
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China; Shanxi Key Laboratory of Edible Fungi for Loess Plateau, Taigu 030801, China.
| | - Cuiping Feng
- College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China.
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3
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Ghanem A, Nessim MI, Khalil NA, El-Nagar RA. Imidazolium-based ionic liquids as dispersants to improve the stability of asphaltene in Egyptian heavy crude oil. Sci Rep 2023; 13:17158. [PMID: 37821519 PMCID: PMC10567904 DOI: 10.1038/s41598-023-44237-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 10/05/2023] [Indexed: 10/13/2023] Open
Abstract
Deposition of asphaltene aggregates can easily depress the oil production, because it may clog the wellbores, annulus, pipelines, and surface facilities. Moreover, asphaltene molecules have a negative effect on the catalytic reactions in the refinery process. Therefore, in this work, three different ionic liquids (IL-H, IL-CH3, and IL-NO2) were synthesized, and characterized using FT-IR and NMR spectroscopy to evaluate their efficiency as asphaltene dispersants. The thermal gravimetric analysis of the prepared ILs showed that IL-H, IL-NO2, and IL-CH3 were thermally stable up to 280 °C. The ILs showed good dispersion activity of the petroleum asphaltenes, where the asphaltene onset precipitation (AOP) was changed from 7.5 to 10.5, 11, and 13.5 ml added n-heptane after the use of IL-H, IL-NO2, and IL-CH3, respectively. Moreover, the colloidal instability index of crude oil was changed from 0.92 (unstable asphaltene) to 0.69 (stable asphaltene). It is noted during the experiments that the presence of an alkyl chain attached to the ionic liquid moiety increases the efficiency of the dispersant. This may be owing to the formation of π-π* with asphaltene molecules due to the presence of electron donating group. Quantum chemical parameters were calculated for the prepared ILs, and the theoretical data confirmed the experimental results.
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Affiliation(s)
- Alaa Ghanem
- PVT Lab, Production Department, Egyptian Petroleum Research Institute, Nasr City, 11727, Cairo, Egypt.
- Egyptian Petroleum Research Institute, PVT Services Center, Nasr City, 11727, Cairo, Egypt.
| | - Maher I Nessim
- Petroleum Testing Lab, Analysis & Evaluation Department, Egyptian Petroleum Research Institute, Nasr City, 11727, Cairo, Egypt
| | - N A Khalil
- Petroleum Testing Lab, Analysis & Evaluation Department, Egyptian Petroleum Research Institute, Nasr City, 11727, Cairo, Egypt
| | - Raghda A El-Nagar
- Petroleum Testing Lab, Analysis & Evaluation Department, Egyptian Petroleum Research Institute, Nasr City, 11727, Cairo, Egypt.
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4
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Tomczak W, Gryta M. Long-Term Performance of Ultrafiltration Membranes: Corrosion Fouling Aspect. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16041673. [PMID: 36837302 PMCID: PMC9959295 DOI: 10.3390/ma16041673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/13/2023] [Accepted: 02/15/2023] [Indexed: 05/14/2023]
Abstract
The past decade has seen a rise in the importance of the ultrafiltration (UF) technique in the separation of various complex solutions. However, the fouling phenomenon is the main limitation to faster process development. To the best of the authors' knowledge, the present paper is the first to aim to identify the role of corrosion fouling in long-term UF. For this purpose, polyvinylidene fluoride (PVDF) and polyethersulfone (PES) membranes were used. The investigations were carried out with the use of both pilot-scale and laboratory-scale units. Results obtained in the present study have clearly demonstrated that the oil concentration has a significant impact on the process performance. Indeed, it has been noted that a reduction in oil concentration from 160 to 100 mg/L resulted in an increase in the PVDF membrane flux from 57 to 77 L/m2h. In addition, it has been shown that the feed temperature has a significant influence on the UF performance. Importantly, it has been shown that corrosion fouling is of vital importance in UF membranes. Indeed, corrosion products such as iron oxides contaminated the membrane surface leading to an irreversible decrease in the UF process performance. In addition, it has been found that repeating the chemical cleaning of the membrane units significantly reduced the intensity of the fouling phenomenon. However, the complete elimination of its effects was not achieved. Therefore, it has been indicated that cleaning agents recommended by membrane manufacturers do not remove corrosion products deposited on the membrane surface. Undoubtedly, the obtained results can be used in the design of UF units leading to the extension of membrane installation lifetime.
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Affiliation(s)
- Wirginia Tomczak
- Faculty of Chemical Technology and Engineering, Bydgoszcz University of Science and Technology, 3 Seminaryjna Street, 85-326 Bydgoszcz, Poland
- Correspondence:
| | - Marek Gryta
- Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, ul. Pułaskiego 10, 70-322 Szczecin, Poland
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5
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Yu Q, Zhu J, Gong G, Yu L, Hu Y, Li J. Efficient preparation of ultrathin ceramic wafer membranes for the high-effective treatment of the oilfield produced water. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Elizabeth Butler M, Jonathan Brant A. EMULSION SEPARATION AND FOULING OF ELECTROSPUN POLYACRYLONITRILE MEMBRANES FOR PRODUCED WATER APPLICATIONS. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Ajibade TF, Tian H, Lasisi KH, Zhang K. Bio-inspired PDA@WS2 polyacrylonitrile ultrafiltration membrane for the effective separation of saline oily wastewater and the removal of soluble dye. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Virga E, Field RW, Biesheuvel PM, de Vos WM. Theory of oil fouling for microfiltration and ultrafiltration membranes in produced water treatment. J Colloid Interface Sci 2022; 621:431-439. [PMID: 35483176 DOI: 10.1016/j.jcis.2022.04.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 04/05/2022] [Accepted: 04/06/2022] [Indexed: 10/18/2022]
Abstract
Due to the complexity of oil-in-water emulsions, the existing literature is still missing a mathematical tool that can describe membrane fouling in a fully quantitative manner on the basis of relevant fouling mechanisms. HYPOTHESIS In this work, a quantitative model that successfully describes cake layer formation and pore blocking is presented. We propose that the degree of pore blocking is determined by the membrane contact angle and the resulting surface coverage, while the cake layer is described by a mass balance and a cake erosion flux. VALIDATION The model is validated by comparison to experimental data from previous works (Dickhout et al. 2019; Virga et al., 2020) where membrane type, surfactant type and salinity were varied. Most input parameters could be directly taken from the experimental conditions, while four fitting parameters were required. FINDINGS The experimental data can be well described by the model which was developed to provide insight into the dominant fouling mechanisms. Moreover, where existing models usually assume that pore blocking precedes cake layer formation, here we find that cake layer formation can start and occur while the degree of pore blocking is still increasing, in line with the more dynamic nature of oil droplets filtration. These new conceptual advances in the field of colloid and interface science open up new pathways for membrane fouling understanding, prevention and control.
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Affiliation(s)
- Ettore Virga
- Membrane Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, the Netherlands; Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, the Netherlands
| | - Robert W Field
- University of Oxford, Department of Engineering Science, Parks Road, Oxford OX1 3PJ, UK
| | - P M Biesheuvel
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, the Netherlands
| | - Wiebe M de Vos
- Membrane Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, the Netherlands.
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9
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Wang Y, Zhou F, Wu Y, Dai L, Xu Z. High-Flux Nanofibrous Membranes with an Under-oil Superhydrophobic Surface Modulated by Zeolitic Imidazolate Framework-71 for Gravity-Driven Water-in-Oil Separation. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yixing Wang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Fu Zhou
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yulin Wu
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Liheng Dai
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhi Xu
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
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10
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Chen M, Heijman SGJ, Luiten-Olieman MWJ, Rietveld LC. Oil-in-water emulsion separation: Fouling of alumina membranes with and without a silicon carbide deposition in constant flux filtration mode. WATER RESEARCH 2022; 216:118267. [PMID: 35306459 DOI: 10.1016/j.watres.2022.118267] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 03/04/2022] [Accepted: 03/06/2022] [Indexed: 06/14/2023]
Abstract
Ceramic membranes have drawn increasing attention in oily wastewater treatment as an alternative to their traditional polymeric counterparts, yet persistent membrane fouling is still one of the largest challenges. Particularly, little is known about ceramic membrane fouling by oil-in-water (O/W) emulsions in constant flux filtration modes. In this study, the effects of emulsion chemistry (surfactant concentration, pH, salinity and Ca2+) and operation parameters (permeate flux and filtration time) were comparatively evaluated for alumina and silicon carbide (SiC) deposited ceramic membranes, with different physicochemical surface properties. The original membranes were made of 100% alumina, while the same membranes were also deposited with a SiC layer to change the surface charge and hydrophilicity. The SiC-deposited membrane showed a lower reversible and irreversible fouling when permeate flux was below 110 L m-2 h-1. In addition, it exhibited a higher permeance recovery after physical and chemical cleaning, as compared to the alumina membranes. Increasing sodium dodecyl sulfate (SDS) concentration in the feed decreased the fouling of both membranes, but to a higher extent in the alumina membranes. The fouling of both membranes could be reduced with increasing the pH of the emulsion due to the enhanced electrostatic repulsion between oil droplets and membrane surface. Because of the screening of surface charge in a high salinity solution (100 mM NaCl), only a small difference in irreversible fouling was observed for alumina and SiC-deposited membranes under these conditions. The presence of Ca2+ in the emulsion led to high irreversible fouling of both membranes, because of the compression of diffusion double layer and the interactions between Ca2+ and SDS. The low fouling tendency and/or high cleaning efficiency of the SiC-deposited membranes indicated their potential for oily wastewater treatment.
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Affiliation(s)
- Mingliang Chen
- Section of Sanitary Engineering, Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands.
| | - Sebastiaan G J Heijman
- Section of Sanitary Engineering, Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands
| | - Mieke W J Luiten-Olieman
- Inorganic Membranes, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Luuk C Rietveld
- Section of Sanitary Engineering, Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands
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11
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PAN/PVA composite nanofibrous membranes for separating oil-in-water emulsion. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-02954-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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Yang XD, Chen W, Ren Y, Chu LY. Exploration of the Adsorption Kinetics of Surfactants at the Water-Oil Interface via Grand-Canonical Molecular Dynamics Simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1277-1286. [PMID: 35015552 DOI: 10.1021/acs.langmuir.1c03205] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
It is well-known that surfactants tend to aggregate into clusters or micelles in aqueous solutions due to their special structures, and it is difficult for the surfactant molecules involved in the aggregation to move spontaneously to the oil-water interface. In this article, we developed a new grand-canonical molecular dynamics (GCMD) model to predict the saturated adsorption amount of surfactant with constant concentration of surfactant molecules in the bulk phase, which can prevent surfactants aggregating in the bulk phase and get the atomic details of the interfacial structural change with increase of the adsorption amount through a single GCMD run. The adsorption of anionic surfactant sodium dodecyl sulfate (SDS) at the heptane-water interface was studied to validate the model. The saturated adsorption amount obtained from the GCMD simulation is consistent with the experimental results. The adsorption kinetics of SDS molecules during the simulation can be divided into three stages: linear adsorption stage, transition adsorption stage, and dynamic equilibrium stage. We also carried out equilibrium molecular dynamics (EMD) simulations to compare with GCMD simulation. This GCMD model can effectively reduce the simulation time with correct prediction of the interfacial saturation adsorption. We believe the GCMD method could be especially helpful for the computational study of surfactant adsorption under complex environments or emulsion systems with the adsorption of multiple types of surfactants.
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Affiliation(s)
- Xue-Dan Yang
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei Chen
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049,China
- Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian, Liaoning 116023, China
| | - Ying Ren
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049,China
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
| | - Liang-Yin Chu
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China
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13
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Bicontinuous porous membranes with micro-nano composite structure using a facile atomization-assisted nonsolvent induced phase separation method. Front Chem Sci Eng 2022. [DOI: 10.1007/s11705-022-2143-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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14
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Anchoring metal organic frameworks on nanofibers via etching-assisted strategy: Toward water-in-oil emulsion separation membranes. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.119812] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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15
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Zulkefli NF, Alias NH, Jamaluddin NS, Abdullah N, Abdul Manaf SF, Othman NH, Marpani F, Mat-Shayuti MS, Kusworo TD. Recent Mitigation Strategies on Membrane Fouling for Oily Wastewater Treatment. MEMBRANES 2021; 12:26. [PMID: 35054552 PMCID: PMC8780462 DOI: 10.3390/membranes12010026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/23/2021] [Accepted: 11/23/2021] [Indexed: 11/30/2022]
Abstract
The discharge of massive amounts of oily wastewater has become one of the major concerns among the scientific community. Membrane filtration has been one of the most used methods of treating oily wastewater due to its stability, convenience handling, and durability. However, the continuous occurrence of membrane fouling aggravates the membrane's performance efficiency. Membrane fouling can be defined as the accumulation of various materials in the pores or surface of the membrane that affect the permeate's quantity and quality. Many aspects of fouling have been reviewed, but recent methods for fouling reduction in oily wastewater have not been explored and discussed sufficiently. This review highlights the mitigation strategies to reduce membrane fouling from oily wastewater. We first review the membrane technology principle for oily wastewater treatment, followed by a discussion on different fouling mechanisms of inorganic fouling, organic fouling, biological fouling, and colloidal fouling for better understanding and prevention of membrane fouling. Recent mitigation strategies to reduce fouling caused by oily wastewater treatment are also discussed.
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Affiliation(s)
- Nur Fatihah Zulkefli
- Department of Oil and Gas Engineering, School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Malaysia; (N.F.Z.); (N.S.J.); (S.F.A.M.); (N.H.O.); (F.M.); (M.S.M.-S.)
| | - Nur Hashimah Alias
- Department of Oil and Gas Engineering, School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Malaysia; (N.F.Z.); (N.S.J.); (S.F.A.M.); (N.H.O.); (F.M.); (M.S.M.-S.)
| | - Nur Shafiqah Jamaluddin
- Department of Oil and Gas Engineering, School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Malaysia; (N.F.Z.); (N.S.J.); (S.F.A.M.); (N.H.O.); (F.M.); (M.S.M.-S.)
| | - Norfadhilatuladha Abdullah
- Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering, Universiti Teknologi Malaysia (UTM), Johor Bahru 81310, Malaysia;
| | - Shareena Fairuz Abdul Manaf
- Department of Oil and Gas Engineering, School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Malaysia; (N.F.Z.); (N.S.J.); (S.F.A.M.); (N.H.O.); (F.M.); (M.S.M.-S.)
| | - Nur Hidayati Othman
- Department of Oil and Gas Engineering, School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Malaysia; (N.F.Z.); (N.S.J.); (S.F.A.M.); (N.H.O.); (F.M.); (M.S.M.-S.)
| | - Fauziah Marpani
- Department of Oil and Gas Engineering, School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Malaysia; (N.F.Z.); (N.S.J.); (S.F.A.M.); (N.H.O.); (F.M.); (M.S.M.-S.)
| | - Muhammad Shafiq Mat-Shayuti
- Department of Oil and Gas Engineering, School of Chemical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Malaysia; (N.F.Z.); (N.S.J.); (S.F.A.M.); (N.H.O.); (F.M.); (M.S.M.-S.)
| | - Tutuk Djoko Kusworo
- Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Semarang 50275, Indonesia;
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Visible-light induced CoMoO4@Bi2MoO6 heterojunction membrane with attractive photocatalytic property and high precision separation toward oil-in-water emulsion. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119568] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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17
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Delamination-Free In-Air and Underwater Oil-Repellent Filters for Oil-Water Separation: Gravity-Driven and Cross-Flow Operations. ENERGIES 2021. [DOI: 10.3390/en14217429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Separating oil-water mixtures is critical in a variety of practical applications, including the treatment of industrial wastewater, oil spill cleanups, as well as the purification of petroleum products. Among various methodologies that have been utilized, membranes are the most attractive technology for separating oil-water emulsions. In recent years, selective wettability membranes have attracted particular attention for oil-water separations. The membrane surfaces with hydrophilic and in-air oleophobic wettability have demonstrated enhanced effectiveness for oil-water separations in comparison with underwater oleophobic membranes. However, developing a hydrophilic and in-air oleophobic surface for a membrane is not a trivial task. The coating delamination process is a critical challenge when applying these membranes for separations. Inspired by the above, in this study we utilize poly(ethylene glycol)diacrylate (PEGDA) and 1H,1H,2H,2H-heptadecafluorodecyl acrylate (F-acrylate) to fabricate a hydrophilic and in-air oleophobic coating on a filter. We utilize methacryloxypropyl trimethoxysilane (MEMO) as an adhesion promoter to enhance the adhesion of the coating to the filter. The filter demonstrates robust oil repellency preventing oil adhesion and oil fouling. Utilizing the filter, gravity-driven and continuous separations of surfactant-stabilized oil-water emulsions are demonstrated. Finally, we demonstrate that the filter can be reused multiple times upon rinsing for further oil-water separations.
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Idrees H, ElSherbiny IMA, Hecket M, Ke Q, Staaks C, Khalil ASG, Ulbricht M, Panglisch S. Surface Modification of Ready‐to‐Use Hollow Fiber Ultrafiltration Modules for Oil/Water Separation. CHEM-ING-TECH 2021. [DOI: 10.1002/cite.202100044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hasan Idrees
- University of Duisburg-Essen Chair for Mechanical Process Engineering and Water Technology Lotharstraße 1 47057 Duisburg Germany
| | - Ibrahim M. A. ElSherbiny
- University of Duisburg-Essen Chair for Mechanical Process Engineering and Water Technology Lotharstraße 1 47057 Duisburg Germany
| | - Meagan Hecket
- University of Duisburg-Essen Chair for Mechanical Process Engineering and Water Technology Lotharstraße 1 47057 Duisburg Germany
| | - Qirong Ke
- University of Duisburg-Essen Chair for Technical Chemistry II Universitätsstraße 7 45141 Essen Germany
| | | | - Ahmed S. G. Khalil
- Fayoum University Physics Department, Environmental and Smart Technology Group (ESGT), Faculty of Science 63514 Fayoum Egypt
- Egypt-Japan University of Science and Technology (E-JUST) Materials Science & Engineering Department School of Innovative Design Engineering 179, New Borg El-Arab City 21934 Alexandria Egypt
| | - Mathias Ulbricht
- University of Duisburg-Essen Chair for Technical Chemistry II Universitätsstraße 7 45141 Essen Germany
- Geschäftsstelle ZWU DGMT German Society of Membrane Technology Universitätsstraße 2 45141 Essen Germany
- Center for Water and Environmental Research (ZWU) Universitätsstraße 2 45141 Essen Germany
| | - Stefan Panglisch
- University of Duisburg-Essen Chair for Mechanical Process Engineering and Water Technology Lotharstraße 1 47057 Duisburg Germany
- Geschäftsstelle ZWU DGMT German Society of Membrane Technology Universitätsstraße 2 45141 Essen Germany
- Center for Water and Environmental Research (ZWU) Universitätsstraße 2 45141 Essen Germany
- IWW Water Center Moritzstraße 26 45476 Mülheim an der Ruhr Germany
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Gryta M. Resistance of Polypropylene Membrane to Oil Fouling during Membrane Distillation. MEMBRANES 2021; 11:membranes11080552. [PMID: 34436315 PMCID: PMC8400933 DOI: 10.3390/membranes11080552] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/20/2021] [Accepted: 07/21/2021] [Indexed: 11/16/2022]
Abstract
The influence of oil emulsion presence in the water on the course of water desalination by membrane distillation was studied. The feed water was contaminated by oil collected from the bilge water. The impact of feed composition on the wetting resistance of hydrophobic polypropylene membranes was evaluated during long-term studies. Two types of the capillary membranes fabricated by thermally induced phase separation method were tested. It has been found that these membranes were non-wetted during the separation of NaCl solutions over a period of 500 h of modules exploitation. The addition of oil (5-100 mg/L) to the feed caused a progressive decline of the permeate flux up to 30%; however, the applied hydrophobic membranes retained their non-wettability for the consecutive 2400 h of the process operation. It was indicated that several compounds containing the carbonyl group were formed on the membranes surface during the process. These hydrophilic compounds facilitated the water adsorption on the surface of polypropylene which restricted the oil deposition on the membranes used.
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Affiliation(s)
- Marek Gryta
- Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, ul. Pułaskiego 10, 70-322 Szczecin, Poland
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Kücük Ş, Hejase CA, Kolesnyk IS, Chew JW, Tarabara VV. Microfiltration of saline crude oil emulsions: Effects of dispersant and salinity. JOURNAL OF HAZARDOUS MATERIALS 2021; 412:124747. [PMID: 33951851 DOI: 10.1016/j.jhazmat.2020.124747] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 11/18/2020] [Accepted: 11/28/2020] [Indexed: 06/12/2023]
Abstract
Dispersants reduce oil-water interfacial tension making the separation of oil-water emulsions challenging. In this study, crude oil stabilized by the dispersant, Corexit EC9500A, was emulsified in synthetic sea water using a range of Corexit/crude oil concentration ratios (up to 10% by volume). With an interfacial tension of only 8.0 mJ/m2 at 0.5 mL(Corexit)/L, approximately 50% of the crude was dispersed into droplets <10 µm. Near complete rejection of oil in crossflow separation tests was accompanied by a precipitous flux decline attributable in part to dispersant- and salinity-induced decrease in membrane's oleophobicity (4.2 mJ/m2 decrease in surface energy). Screening of electrostatic interactions prompted oil coalescence that occurred at the membrane surface but not in the bulk of the emulsion. Real-time in situ visualization by Direct Observation Through Membrane gave direct evidence of surface coalescence pointing to both its detrimental effects (spread of contiguous films) and possible advantages (removal of large droplets by crossflow shear).
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Affiliation(s)
- Şeyma Kücük
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI 48824, USA.
| | - Charifa A Hejase
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI 48824, USA.
| | - Iryna S Kolesnyk
- Department of Chemistry, National University of Kyiv-Mohyla Academy, Kyiv 04070, Ukraine.
| | - Jia Wei Chew
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 637459, Singapore; Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 637141, Singapore.
| | - Volodymyr V Tarabara
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI 48824, USA.
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Matindi CN, Hu M, Kadanyo S, Ly QV, Gumbi NN, Dlamini DS, Li J, Hu Y, Cui Z, Li J. Tailoring the morphology of polyethersulfone/sulfonated polysulfone ultrafiltration membranes for highly efficient separation of oil-in-water emulsions using TiO2 nanoparticles. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118868] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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23
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Hejase CA, Tarabara VV. Nanofiltration of saline oil-water emulsions: Combined and individual effects of salt concentration polarization and fouling by oil. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118607] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Tian J, Trinh TA, Kalyan MN, Ho JS, Chew JW. In-situ monitoring of oil emulsion fouling in ultrafiltration via electrical impedance spectroscopy (EIS): Influence of surfactant. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118527] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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25
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Wang M, Xu Z, Hou Y, Li P, Sun H, Niu QJ. Fabrication of a superhydrophilic PVDF membrane with excellent chemical and mechanical stability for highly efficient emulsion separation. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117408] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Tummons E, Han Q, Tanudjaja HJ, Hejase CA, Chew JW, Tarabara VV. Membrane fouling by emulsified oil: A review. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116919] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Antifouling Property of Oppositely Charged Titania Nanosheet Assembled on Thin Film Composite Reverse Osmosis Membrane for Highly Concentrated Oily Saline Water Treatment. MEMBRANES 2020; 10:membranes10090237. [PMID: 32947791 PMCID: PMC7558336 DOI: 10.3390/membranes10090237] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/07/2020] [Accepted: 09/13/2020] [Indexed: 01/06/2023]
Abstract
With the blooming of oil and gas industries, oily saline wastewater treatment becomes a viable option to resolve the oily water disposal issue and to provide a source of water for beneficial use. Reverse osmosis (RO) has been touted as a promising technology for oily saline wastewater treatment. However, one great challenge of RO membrane is fouling phenomena, which is caused by the presence of hydrocarbon contents in the oily saline wastewater. This study focuses on the fabrication of antifouling RO membrane for accomplishing simultaneous separation of salt and oil. Thin film nanocomposite (TFN) RO membrane was formed by the layer by layer (LbL) assembly of positively charged TNS (pTNS) and negatively charged TNS (nTNS) on the surface of thin film composite (TFC) membrane. The unique features, rendered by hydrophilic TNS bilayer assembled on TFC membrane in the formation of a hydration layer to enhance the fouling resistance by high concentration oily saline water while maintaining the salt rejection, were discussed in this study. The characterization findings revealed that the surface properties of membrane were improved in terms of surface hydrophilicity, surface roughness, and polyamide(PA) cross-linking. The TFC RO membrane coated with 2-bilayer of TNS achieved >99% and >98% for oil and salt rejection, respectively. During the long-term study, the 2TNS-PA TFN membrane outperformed the pristine TFC membrane by exhibiting high permeability and much lower fouling propensity for low to high concentration of oily saline water concentration (1000 ppm, 5000 ppm and 10,000 ppm) over a 960 min operation. Meanwhile, the average permeability of uncoated TFC membrane could only be recovered by 95.7%, 89.1% and 82.9% for 1000 ppm, 5000 ppm and 10,000 ppm of the oily saline feedwater, respectively. The 2TNS-PA TFN membrane achieved almost 100% flux recovery for three cycles by hydraulic washing.
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Lv K, Huang W, Wang S, Han Y, Wang Q, Sun T, Yan H, Jia H. Systematic investigation of the effects of surfactant/salt intermolecular interaction on the interfacial tension of a water/oil system. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2019.1617165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Kaihe Lv
- Ministry of Education, Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Qingdao, China
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, China
| | - Wenjian Huang
- Ministry of Education, Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Qingdao, China
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, China
| | - Shaoyan Wang
- Ministry of Education, Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Qingdao, China
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, China
| | - Yugui Han
- Bohai Oilfield Research Institute, Tianjin Branch, CNOOC China Limited, Tianjin, China
| | - Qiuxia Wang
- Bohai Oilfield Research Institute, Tianjin Branch, CNOOC China Limited, Tianjin, China
| | - Tunan Sun
- Ministry of Education, Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Qingdao, China
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, China
| | - Hui Yan
- School of Pharmacy, Liaocheng University, Liaocheng, China
| | - Han Jia
- Ministry of Education, Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Qingdao, China
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, China
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Liang Y, Kim S, Yang E, Choi H. Omni-Directional Protected Nanofiber Membranes by Surface Segregation of PDMS-Terminated Triblock Copolymer for High-Efficiency Oil/Water Emulsion Separation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:25324-25333. [PMID: 32379960 DOI: 10.1021/acsami.0c05559] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
An excellent antifouling membrane with high permeate flux is required for oil/water emulsion separation due to ever-increasing oily industrial wastewater. Thus, an intriguing integration of the Omni-directional protected porous membrane that combines a high porosity nanofiber membrane with a surface segregation mechanism is established for the first time. By applying polydimethylsiloxane(PDMS)-terminated triblock copolymer, the enrichment of the hydrophilic poly(ethylene oxide) (PEO) segment and the nonpolar PDMS segment on the surface of the nanofiber endowed the nanofiber membrane with underwater oleophobicity and low oil adhesion force, exhibiting oil resistance as well as oil release property. An ultrahigh permeate flux of ∼7115 L m-2 h-1 with a separation efficiency of ∼97.88% is achieved under the driving force of gravity (∼0.9 kPa), which is the highest permeate flux ever reported under similar conditions. Moreover, the surface segregation nanofiber membrane shows excellent reusability and ultrahigh permeate flux with the assistance of stirring in a long-term test, revealing the promising performances for the further particular application of oily wastewater.
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Affiliation(s)
- Yejin Liang
- School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea
| | - Soyoung Kim
- School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea
| | - Eunmok Yang
- School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea
| | - Heechul Choi
- School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, South Korea
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Ma W, Li Y, Gao S, Cui J, Qu Q, Wang Y, Huang C, Fu G. Self-Healing and Superwettable Nanofibrous Membranes with Excellent Stability toward Multifunctional Applications in Water Purification. ACS APPLIED MATERIALS & INTERFACES 2020; 12:23644-23654. [PMID: 32345011 DOI: 10.1021/acsami.0c05701] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Considering the complexity of toxic ingredients in practical polluted water, the development of energy- and labor-saving and environmentally friendly multifunctional materials to decontaminate wastewater is of great necessity. Herein, a multifunctional branched poly(ethylenimine) (bPEI) and poly(acrylic acid) (PAA)/tungsten oxide/polyacrylonitrile (PP/WO3/PAN) composite membrane was fabricated by the combination of blow spinning and layer-by-layer methods. The incorporated WO3 in generated in hydrophilic PAN fibers by spinning the precursor method, which simultaneously reveals remarkable photodegradation performance towards mimetic organic pollutions and excellent antibacterial activity due to their electron synergetic effect. In addition, the micro/nanoporous structure of the PP/WO3/PAN composite membrane also ensures its good oil-water separation performance. Moreover, the reduction reaction of W atoms in the WO3 network upon solar irradiation endows the membrane with superior heavy metal ion removal capability. Significantly, the membrane exhibits water-enabled self-healing performance due to the coated polyelectrolyte layer. More importantly, the membrane could be easily scaled-up; was free-standing, durable, and biocompatible; and exhibited no additional toxic effect on the surrounding environments. These outstanding properties make the membrane to have significant potential applications in wastewater treatment.
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Affiliation(s)
- Wenjing Ma
- College of Chemistry and Chemical Engineering, Southeast University (SEU), Nanjing 211189, P. R. China
| | - Yuansheng Li
- Joint Laboratory of Advanced Biomedical Technology (NFU-UGent), College of Chemical Engineering, Nanjing Forestry University (NFU), Nanjing 210037, P. R. China
| | - Shuting Gao
- Joint Laboratory of Advanced Biomedical Technology (NFU-UGent), College of Chemical Engineering, Nanjing Forestry University (NFU), Nanjing 210037, P. R. China
| | - Jiaxin Cui
- Joint Laboratory of Advanced Biomedical Technology (NFU-UGent), College of Chemical Engineering, Nanjing Forestry University (NFU), Nanjing 210037, P. R. China
| | - Qingli Qu
- Joint Laboratory of Advanced Biomedical Technology (NFU-UGent), College of Chemical Engineering, Nanjing Forestry University (NFU), Nanjing 210037, P. R. China
| | - Yulin Wang
- Joint Laboratory of Advanced Biomedical Technology (NFU-UGent), College of Chemical Engineering, Nanjing Forestry University (NFU), Nanjing 210037, P. R. China
| | - Chaobo Huang
- Joint Laboratory of Advanced Biomedical Technology (NFU-UGent), College of Chemical Engineering, Nanjing Forestry University (NFU), Nanjing 210037, P. R. China
| | - Guodong Fu
- College of Chemistry and Chemical Engineering, Southeast University (SEU), Nanjing 211189, P. R. China
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Jiang Y, Zhao C, Wang Y, Cheng T, Zhou G. Interfacial properties of sodium para-dimethyl alkylbenzene sulfonate in the presence of monovalent metal counterions at the oil-water interface. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2019.1612249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Yulian Jiang
- College of Chemistry, Jilin University, Changchun, China
| | - Changming Zhao
- College of Chemistry, Jilin University, Changchun, China
| | - Yue Wang
- College of Chemistry, Jilin University, Changchun, China
| | - Tiexin Cheng
- College of Chemistry, Jilin University, Changchun, China
| | - Guangdong Zhou
- College of Chemistry, Jilin University, Changchun, China
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Galvagno M, Ramon GZ. Hydrodynamic-Colloidal Interactions of an Oil Droplet and a Membrane Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2858-2864. [PMID: 32101009 DOI: 10.1021/acs.langmuir.9b03778] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Membranes have been shown to be exceptionally successful in the challenging separation of stable oil/water emulsions but suffer from severe fouling that limits their performance. Understanding the mechanisms leading to oil deposition on the membrane surface, as influenced by hydrodynamics and colloidal surface interactions, is imperative for informing better engineered membrane surfaces and process conditions. Here, we study the interactions between an oil droplet and a membrane surface. Hydrodynamics within the water film, confined between the droplet and the membrane, are captured within the framework of the lubrication approximation, coupled with the van der Waals (vdW) and electrostatic interactions through the droplet shape, which is governed by an augmented Young-Laplace equation. The model is used to calculate possible equilibrium positions, where the droplet is held at a finite distance from the membrane by a balance of the forces present. An equilibrium phase diagram is constructed as a function of various process parameters and is shown in terms of the scaled permeation rate through the membrane. The phase diagram identifies the range of conditions leading to deposition, characterized by a "critical" permeation rate, beyond which no equilibrium exists. When equilibrium positions are permitted, we find that these may be classified as stable/unstable, in the kinetic sense. Further, our results demonstrate the link between the deformation of the droplet and the stability of equilibria. An upward deflection of the droplet surface, owing to a dominant, long-range repulsion, has a stabilizing effect, as it maintains the separation between the droplet and membrane. Conversely, a downward deflection is destabilizing because of the self-amplifying effect of strongly increasing attractive forces with separation distance-as the surfaces are pulled together because of deformation, the attractive force increases, causing further deformation. This is also manifested by a dependence of the bistable region on the deformability of the droplet, which is represented by a capillary number, modified so as to account for the effect of the permeable boundary. As the droplet becomes more easy to deform, the transition from an unconditionally stable region of the phase diagram to a point beyond which there is no equilibrium (interpreted as deposition) becomes abrupt. These results provide valuable physical insights into the mechanisms that govern oil fouling of membrane surfaces.
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Affiliation(s)
- Mariano Galvagno
- Department of Civil & Environmental Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel
| | - Guy Z Ramon
- Department of Civil & Environmental Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel
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Tummons EN, Hejase CA, Yang Z, Chew JW, Bruening ML, Tarabara VV. Oil droplet behavior on model nanofiltration membrane surfaces under conditions of hydrodynamic shear and salinity. J Colloid Interface Sci 2020; 560:247-259. [DOI: 10.1016/j.jcis.2019.10.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/03/2019] [Accepted: 10/04/2019] [Indexed: 10/25/2022]
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Chen M, Zhu L, Chen J, Yang F, Tang CY, Guiver MD, Dong Y. Spinel-based ceramic membranes coupling solid sludge recycling with oily wastewater treatment. WATER RESEARCH 2020; 169:115180. [PMID: 31669905 DOI: 10.1016/j.watres.2019.115180] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 10/03/2019] [Accepted: 10/09/2019] [Indexed: 06/10/2023]
Abstract
Highly efficient and economic treatment of wastewater sludges and wastewaters in one way is a challenging issue in the water treatment field. Herein we present a waste-to-resource strategy for rational fabrication of low-cost ceramic membranes, which simultaneously addresses the treatment of heavy metal-laden sludges and the separation of oil-in-water (O/W) emulsions. A thermal conversion mechanism is proposed for complicated reactions between simulated nickel-laden wastewater sludge and bauxite mineral. In addition to full stabilization and recycling of heavy metal wastewater sludges, rational tailoring of ceramic membrane structures can also be realized to achieve high water flux and favorable mechanical and surface properties. With rational structure design, the tailored spinel-based ceramic membranes exhibited high rejection and high flux (7473 LMH·bar-1) simultaneously for separation of oily wastewater, outperforming other reported state-of-the-art ceramic membranes. The membrane fouling mechanism revealed the dominance of cake layer formation at low cross flow velocities, while a combined model of cake layer formation and pore blocking dominated membrane fouling at high cross-flow velocities. The proposed strategy can be potentially extended toward design of functional ceramic membranes derived from other heavy metal wastewater sludges and for other water treatment applications.
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Affiliation(s)
- Mingliang Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, PR China; Department of Sanitary Engineering, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, 2600 GA, Delft, the Netherlands
| | - Li Zhu
- Engineering Research Center of Environmental Materials and Membrane Technology of Hubei Province, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, PR China
| | - Jingwen Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, PR China
| | - Fenglin Yang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, PR China
| | - Chuyang Y Tang
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Michael D Guiver
- State Key Laboratory of Engines, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, PR China
| | - Yingchao Dong
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, PR China.
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Wang X, Xiao C, Liu H, Chen M, Xu H, Luo W, Zhang F. Robust functionalization of underwater superoleophobic PVDF-HFP tubular nanofiber membranes and applications for continuous dye degradation and oil/water separation. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117583] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Ultrafiltration of oil-in-water emulsions using ceramic membrane: Roles played by stabilized surfactants. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123948] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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39
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Shi L, Huang J, Zeng G, Zhu L, Gu Y, Shi Y, Yi K, Li X. Roles of surfactants in pressure-driven membrane separation processes: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:30731-30754. [PMID: 31494849 DOI: 10.1007/s11356-019-06345-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 08/28/2019] [Indexed: 06/10/2023]
Abstract
Surfactants widely exist in various kinds of wastewaters which could be treated by pressure-driven membrane separation (PDMS) techniques. Due to the special characteristics of surfactants, they may affect the performance of membrane filtration. Over the last two decades, there are a number of studies on treating wastewaters containing surfactants by PDMS. The current paper gives a review of the roles of surfactants in PDMS processes. The effects of surfactants on membrane performance were discussed via two aspects: influence of surfactants on membrane fouling and enhanced removal of pollutants by surfactants. The characteristics of surfactants in solution and at solid-liquid interface were summarized. Surfactants in membrane filtration processes cause membrane fouling mainly through adsorption, concentration polarization, pore blocking, and cake formation, and fouling degree may be influenced by various factors (feed water composition, membrane properties, and operation conditions). Furthermore, surfactants may also have a positive effect on membrane performance. Enhanced removal of various kinds of pollutants by PDMS in the presence of surfactants has been summarized, and the removal mechanism has been revealed. Based on the current reports, further studies on membrane fouling caused by surfactants and enhanced removal of pollutants by surfactant-aided membrane filtration were also proposed.
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Affiliation(s)
- Lixiu Shi
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, Hunan, China
| | - Jinhui Huang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China.
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, Hunan, China.
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China.
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, Hunan, China.
| | - Lei Zhu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, Hunan, China
| | - Yanling Gu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, Hunan, China
| | - Yahui Shi
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, Hunan, China
| | - Kaixin Yi
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, Hunan, China
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha, 410082, Hunan, China
| | - Xue Li
- Department of Bioengineering and Environmental Science, Changsha University, Changsha, 410003, Hunan, China
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Wang F, Pi J, Li JY, Song F, Feng R, Wang XL, Wang YZ. Highly-efficient separation of oil and water enabled by a silica nanoparticle coating with pH-triggered tunable surface wettability. J Colloid Interface Sci 2019; 557:65-75. [PMID: 31514094 DOI: 10.1016/j.jcis.2019.08.114] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 08/30/2019] [Accepted: 08/31/2019] [Indexed: 11/29/2022]
Abstract
Environmentally switched superwetting surfaces that can be used for separating various oil/water mixtures are of particular interest due to the increasing difficulty and complexity in oily wastewater treatment. Here, a novel fluorine-free pH-responsive coating is prepared by surface modification of SiO2 nanoparticles with dimethyloctadecyl [3-(trimethoxysilyl) propyl] ammonium chloride and (N, N-dimethyl-3-aminopropyl) trimethoxysilane. With the assistance of polyethylene imine as a binder, such coating can be used for different porous substrates, e. g. cotton fabric and filter paper, to develop separation materials having tunable superhydrophilicity/superhydrophobicity and high antibacterial property. Due to the well-controlled surface wettability upon the pH variation, the as-prepared materials can effectively separate various types of oil/water mixtures with efficiency higher than 99.9%, including the layered oil/water mixture, water-in-oil emulsions and oil-in-water emulsions stabilized by different types of surfactants. Additionally, the materials can resist strong acid/base solutions and various organic solvents as well as 50-cycle mechanical abrasion and 120-cycle tape-peeling without losing anti-wetting performance. Featuring the tunable surface wettability, chemical/mechanical robustness, and antibacterial activity, such coating holds promising applications for treating various oil/water mixtures in harsh and biological-contamination conditions.
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Affiliation(s)
- Fang Wang
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Jing Pi
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Jing-Yu Li
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Fei Song
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China.
| | - Rui Feng
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiu-Li Wang
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yu-Zhong Wang
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China.
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Tanudjaja HJ, Chew JW. In-situ characterization of cake layer fouling during crossflow microfiltration of oil-in-water emulsion. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.02.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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42
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Lv K, Jia K, Han Y, Wang Q, Leng X, Yan H, Jia H. Effects of Divalent Salts on the Interfacial Activity of the Mixed Surfactants at the Water/Model Oil Interface. J SURFACTANTS DETERG 2019. [DOI: 10.1002/jsde.12313] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kaihe Lv
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum EngineeringChina University of Petroleum (East China) Qingdao 266580 China
| | - Kaile Jia
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum EngineeringChina University of Petroleum (East China) Qingdao 266580 China
| | - Yugui Han
- Bohai Oilfield Research Institute, Tianjin BranchCNOOC China Limited Tianjin 300459 China
| | - Qiuxia Wang
- Bohai Oilfield Research Institute, Tianjin BranchCNOOC China Limited Tianjin 300459 China
| | - Xu Leng
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum EngineeringChina University of Petroleum (East China) Qingdao 266580 China
| | - Hui Yan
- School of PharmacyLiaocheng University Liaocheng 252000 China
| | - Han Jia
- Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum EngineeringChina University of Petroleum (East China) Qingdao 266580 China
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Tanudjaja HJ, Hejase CA, Tarabara VV, Fane AG, Chew JW. Membrane-based separation for oily wastewater: A practical perspective. WATER RESEARCH 2019; 156:347-365. [PMID: 30928529 DOI: 10.1016/j.watres.2019.03.021] [Citation(s) in RCA: 203] [Impact Index Per Article: 40.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 02/26/2019] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
The large volumes of oily wastewater generated by various industries, such as oil and gas, food and beverage, and metal processing, need to be de-oiled prior to being discharged into the environment. Compared to conventional technologies such as dissolved air flotation (DAF), coagulation or solvent extraction, membrane filtration can treat oily wastewater of a much broader compositional range and still ensure high oil removals. In the present review, various aspects related to the practical implementation of membranes for the treatment of oily wastewater are summarized. First, sources and composition of oily wastewater, regulations that stipulate the extent of treatment needed before discharge, and the conventional technologies that enable such treatment are appraised. Second, commercially available membranes, membrane modules, operation modes and hybrids are overviewed, and their economics are discussed. Third, challenges associated with membrane filtration are examined, along with means to quantify and mitigate membrane fouling. Finally, perspectives on state-of-the-art techniques to facilitate better monitoring and control of such systems are briefly discussed.
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Affiliation(s)
- Henry J Tanudjaja
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 37459, Singapore
| | - Charifa A Hejase
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Volodymyr V Tarabara
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Anthony G Fane
- Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore
| | - Jia Wei Chew
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 37459, Singapore; Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore, 637141, Singapore.
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Trinh TA, Han Q, Ma Y, Chew JW. Microfiltration of oil emulsions stabilized by different surfactants. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.02.068] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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45
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Yagoub H, Zhu L, Shibraen MHMA, Xu X, Babiker DMD, Xu J, Yang S. Complex membrane of cellulose and chitin nanocrystals with cationic guar gum for oil/water separation. J Appl Polym Sci 2019. [DOI: 10.1002/app.47947] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Hajo Yagoub
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low‐Dimension MaterialsCollege of Materials Science and Engineering, Donghua University Shanghai 201620 China
| | - Liping Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low‐Dimension MaterialsCollege of Materials Science and Engineering, Donghua University Shanghai 201620 China
| | | | - Xiaowei Xu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low‐Dimension MaterialsCollege of Materials Science and Engineering, Donghua University Shanghai 201620 China
| | - Dafaalla M. D. Babiker
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low‐Dimension MaterialsCollege of Materials Science and Engineering, Donghua University Shanghai 201620 China
| | - Jian Xu
- Laboratory of Polymer Physics and ChemistryInstitute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
| | - Shuguang Yang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low‐Dimension MaterialsCollege of Materials Science and Engineering, Donghua University Shanghai 201620 China
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Lin YM, Song C, Rutledge GC. Direct Three-Dimensional Visualization of Membrane Fouling by Confocal Laser Scanning Microscopy. ACS APPLIED MATERIALS & INTERFACES 2019; 11:17001-17008. [PMID: 31034210 DOI: 10.1021/acsami.9b01770] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Membrane-based separation is an important technique for removing emulsified oil from water. However, the mechanisms of fouling are complex because of the deformability and potential for coalescence and break-up of the oil droplets. Here, we report for the first time direct, three-dimensional (3D) visualization of oil droplets on electrospun fiber microfiltration membranes after a period of membrane-based separation of oil-in-water emulsions. High-resolution 3D images were acquired by a dual-channel confocal laser scanning microscopy (CLSM) technique in which both the fibers and the oil (dodecane) were fluorescently labeled. The morphology of dodecane as the foulant was observed for two different types of fibers, an oleophobic nylon (PA6(3)T), and oleophilic polyvinylidene fluoride (PVDF). Through direct visualization, the rejected oil was found to form droplets of clam-shell shape on the PA6(3)T fibers, whereas the oil tended to wet the PVDF fibers and spread across the membrane. The morphology was also analyzed as a function of separation time (i.e., "4D" imaging), as the oil accumulated within and upon the membranes. The observations are qualitatively consistent with a transition from blocking of individual pores in the membrane to coalescence of oil droplets into coherent liquid films with increasing filtration time. Analysis of permeate flux using blocking filtration models corroborate the transition of fouling modes indicated by the 3D images. This direct, 3D visualization CLSM technique is a powerful tool for characterizing the mechanisms of fouling in membranes used for liquid emulsion separations.
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Tanudjaja HJ, Chew JW. Critical flux and fouling mechanism in cross flow microfiltration of oil emulsion: Effect of viscosity and bidispersity. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.11.083] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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48
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Salama A. Modeling of flux decline behavior during the filtration of oily-water systems using porous membranes: Effect of pinning of nonpermeating oil droplets. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.06.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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49
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Tanis-Kanbur MB, Velioğlu S, Tanudjaja HJ, Hu X, Chew JW. Understanding membrane fouling by oil-in-water emulsion via experiments and molecular dynamics simulations. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.08.067] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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50
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Lin YM, Rutledge GC. Separation of oil-in-water emulsions stabilized by different types of surfactants using electrospun fiber membranes. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.05.063] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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