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Gan Q, Wu C, Long L, Peng LE, Yang Z, Guo H, Tang CY. Does Surface Roughness Necessarily Increase the Fouling Propensity of Polyamide Reverse Osmosis Membranes by Humic Acid? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:2548-2556. [PMID: 36719958 DOI: 10.1021/acs.est.2c07872] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Surface roughness has crucial influence on the fouling propensity of thin film composite (TFC) polyamide reverse osmosis (RO) membranes. A common wisdom is that rougher membranes tend to experience more severe fouling. In this study, we compared the fouling behaviors of a smooth polyamide membrane (RO-s) and a nanovoid-containing rough polyamide membrane (RO-r). Contrary to the traditional belief, we observed more severe fouling for RO-s, which can be ascribed to its uneven flux distribution caused by the "funnel effect". Additional tracer filtration tests using gold nanoparticles revealed a more patchlike particle deposition pattern, confirming the adverse impact of "funnel effect" on membrane water transport. In contrast, the experimentally observed lower fouling propensity of the nanovoid-containing rough membrane can be explained by: (1) the weakened "funnel effect" thanks to the presence of nanovoids, which can regulate the water transport pathway through the membrane and (2) the decreased average localized flux over the membrane surface due to the increased effective filtration area for the nanovoid-induced roughness features. The current study provides fundamental insights into the critical role of surface roughness in membrane fouling, which may have important implications for the future development of high-performance antifouling membranes.
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Affiliation(s)
- Qimao Gan
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR999077, P. R. China
| | - Chenyue Wu
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR999077, P. R. China
| | - Li Long
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR999077, P. R. China
| | - Lu Elfa Peng
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR999077, P. R. China
| | - Zhe Yang
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR999077, P. R. China
| | - Hao Guo
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR999077, P. R. China
| | - Chuyang Y Tang
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong SAR999077, P. R. China
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2
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Ates N, Uzal N, Yetis U, Dilek FB. Removal of pesticides from secondary treated urban wastewater by reverse osmosis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:8732-8745. [PMID: 35404035 DOI: 10.1007/s11356-022-20077-5] [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: 11/01/2021] [Accepted: 03/31/2022] [Indexed: 06/14/2023]
Abstract
The residues of pesticides that reach water resources from agricultural activities in several ways contaminate drinking water resources and threaten aquatic life. This study aimed to investigate the performance of three reverse osmosis (RO) membranes (BW30-LE, SW30-XLE, and GE-AD) in rejecting four different pesticides (tributyl phosphate, flutriafol, dicofol, and irgarol) from secondary treated urban wastewater and also to elucidate the mechanisms underlying the rejection of these pesticides. RO experiments were conducted using pesticide-spiked wastewater samples under 10 and 20 bar transmembrane pressures (TMP) and membrane performances were evaluated. Overall, all the membranes tested exhibited over 95% rejection performances for all pesticides at both TMPs. The highest rejections for tributyl phosphate (99.0%) and irgarol (98.3%) were obtained with the BW30-LE membrane, while for flutriafol (99.9%) and dicofol (99.1%) with the GE-AD membrane. The increase in TMP from 10 to 20 bar did not significantly affect the rejections of all pesticides. The rejection performances of RO membranes were found to be governed by projection area as well as molecular weight and hydrophobicity/hydrophilicity of pesticides. Among the membranes tested, the SW30-XLE membrane was the most prone to fouling due to the higher roughness.
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Affiliation(s)
- Nuray Ates
- Department of Environmental Engineering, Erciyes University, Kayseri, Turkey.
| | - Nigmet Uzal
- Department of Civil Engineering, Abdullah Gul University, Kayseri, Turkey
| | - Ulku Yetis
- Department of Environmental Engineering, Middle East Technical University, Ankara, Turkey
| | - Filiz B Dilek
- Department of Environmental Engineering, Middle East Technical University, Ankara, Turkey
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3
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Bakhodaye Dehghanpour S, Parvizian F, Vatanpour V, Razavi M. PVA/TS-1 composite embedded thin-film nanocomposite reverse osmosis membrane with enhanced desalination performance and fouling resistance. CHEM ENG COMMUN 2022. [DOI: 10.1080/00986445.2022.2156342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Fahimeh Parvizian
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak, Iran
| | - Vahid Vatanpour
- Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, Tehran, Iran
- National Research Center on Membrane Technologies, Istanbul Technical University Maslak, Istanbul, Turkey
| | - Mansour Razavi
- Department of Ceramic, Materials and Energy Research Center, Karaj, Iran
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4
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Hu D, Ren X, Fu H, Wang Y, Feng X, Li H. Constructing highly rough skin layer of thin film (nano)composite polyamide membranes to enhance separation performance: A review. J Appl Polym Sci 2022. [DOI: 10.1002/app.52692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Dan Hu
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry and Key Laboratory of Brewing Molecular Engineering of China Light Industry School of Light Industry, Beijing Technology and Business University Beijing P. R. China
| | - Xiaomin Ren
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry and Key Laboratory of Brewing Molecular Engineering of China Light Industry School of Light Industry, Beijing Technology and Business University Beijing P. R. China
| | - Hongyan Fu
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry and Key Laboratory of Brewing Molecular Engineering of China Light Industry School of Light Industry, Beijing Technology and Business University Beijing P. R. China
| | - Yu Wang
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry and Key Laboratory of Brewing Molecular Engineering of China Light Industry School of Light Industry, Beijing Technology and Business University Beijing P. R. China
| | - Xudong Feng
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry and Key Laboratory of Brewing Molecular Engineering of China Light Industry School of Light Industry, Beijing Technology and Business University Beijing P. R. China
| | - Hehe Li
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry and Key Laboratory of Brewing Molecular Engineering of China Light Industry School of Light Industry, Beijing Technology and Business University Beijing P. R. China
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5
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Constructing visible-light-driven self-cleaning UF membrane by quaternary ammonium-functionalized Ti-MOFs for water remediation. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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6
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Pervez MN, Mahboubi A, Uwineza C, Zarra T, Belgiorno V, Naddeo V, Taherzadeh MJ. Factors influencing pressure-driven membrane-assisted volatile fatty acids recovery and purification-A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 817:152993. [PMID: 35026250 DOI: 10.1016/j.scitotenv.2022.152993] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 12/30/2021] [Accepted: 01/05/2022] [Indexed: 06/14/2023]
Abstract
Volatile fatty acids (VFAs) are building block chemicals that can be produced through bioconversion of organic waste streams via anaerobic digestion as intermediate products. Purified VFAs are applicable in a wide range of industrial applications such as food, textiles, cosmetics, pharmaceuticals etc. production. The present review focuses on VFAs recovery methods and technologies such as adsorption, distillation, extraction, gas stripping, esterification and membrane based techniques etc., while presenting a discussion of their pros and cons. Moreover, a great attention has been given to the recovery of VFAs through membrane filtration as a promising sustainable clarification, fractionation and concentration approach. In this regard, a thorough overview of factors affecting membrane filtration performance for VFAs recovery has been presented. Filtration techniques such as nanofiltration and reverse osmosis have shown to be capable of recovering over 90% of VFAs content from organic effluent steams, proving the direct effect of membrane materials/surface chemistry, pore size and solution pH in recovery success level. Overall, this review presents a new insight into challenges and potentials of membrane filtration for VFAs recovery based on the effects of factors such as operational parameters, membrane properties and effluent characteristics.
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Affiliation(s)
- Md Nahid Pervez
- Swedish Centre for Resource Recovery, University of Borås, 501 90 Borås, Sweden; Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Amir Mahboubi
- Swedish Centre for Resource Recovery, University of Borås, 501 90 Borås, Sweden
| | - Clarisse Uwineza
- Swedish Centre for Resource Recovery, University of Borås, 501 90 Borås, Sweden
| | - Tiziano Zarra
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Vincenzo Belgiorno
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Vincenzo Naddeo
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
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7
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Rodríguez-Vidal FJ, Ortega-Azabache B, González-Martínez Á, Bellido-Fernández A. Comprehensive characterization of industrial wastewaters using EEM fluorescence, FT-IR and 1H NMR techniques. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 805:150417. [PMID: 34818815 DOI: 10.1016/j.scitotenv.2021.150417] [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: 06/27/2021] [Revised: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
The organic matter present in six industrial wastewaters (pulp and paper mill, brewery, textile, dairy, slaughterhouse effluents and a municipal landfill leachate) has been studied in this work using three analytical techniques: excitation-emission matrix fluorescence (EEMF), proton nuclear magnetic resonance spectroscopy (1H NMR) and Fourier transform infrared spectroscopy (FTIR). The pulp and paper mill effluent shows characteristic signals of the presence of lignins, carbohydrates and carboxylic acids, as well as sulfate, carbonate and sulfonates (coming from surfactants used in the cleaning of tanks). The main constituents of the brewery effluent are peptides and proteins coming mainly from spent yeast and diatomite filters (the presence of the latter was confirmed by SiO bands in the FTIR spectrum). The municipal landfill leachate is characterized by the majority presence of humic substances (typical of an old landfill) and a residual presence of small peptides, amino acids and carboxylic acids. Additionally, several inorganic compounds were identified by FTIR, such as nitrate, sulfate, phosphate and cyanide ions. The textile effluent from a cotton-based industry contains carbohydrates, carboxylic acids and sulfonates, which can act as auxochromes in the textile industry. The dairy effluent comprises amino acids and small peptides coming from the biodegradation of milk and whey in addition to carbohydrates (lactose) and carboxylic acids (mainly lactic acid). The presence of tyrosine-like peaks B in the EEMF spectrum of the slaughterhouse effluent indicates the existence of small peptides and amino acids coming from the biodegradation of blood proteins. Additionally, residual glucose, fatty acids, phosphate and sulfate were also identified in this effluent.
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Affiliation(s)
- Francisco J Rodríguez-Vidal
- Department of Chemistry, Higher Polytechnic School, University of Burgos, Av Cantabria s/n, 09006 Burgos, Spain.
| | - Beatriz Ortega-Azabache
- Department of Chemistry. Faculty of Sciences, University of Burgos, Pz Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Ángela González-Martínez
- Department of Chemistry. Faculty of Sciences, University of Burgos, Pz Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Ana Bellido-Fernández
- Department of Chemistry. Faculty of Sciences, University of Burgos, Pz Misael Bañuelos s/n, 09001 Burgos, Spain
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8
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Maitreya A, Pal S, Qureshi A, Reyed RM, Purohit HJ. Nitric oxide-secreting probiotics as sustainable bio-cleaners for reverse osmosis membrane systems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:4911-4929. [PMID: 34797547 DOI: 10.1007/s11356-021-17289-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 10/27/2021] [Indexed: 06/13/2023]
Abstract
Membrane biofouling in water purification plants is a serious issue of worldwide concern. Various chemical, physical, and biochemical processes are practised for membrane clean-up. A high-dosage treatment adversely affects the life expectancy of the membrane, and minimum dosage seems unable to deteriorate the biofilms on the membrane. It is reported that quorum quenchers like nitric oxide (NO) disrupt biofilm signals through metabolic rewiring, and also NO is known to be secreted by probiotics (good bacteria). In the present review, it is hypothesized that if probiotic biofilms secreting NO are used, other microbes that aggregate on the filtration membrane could be mitigated. The concept of probiotic administration on filtration membrane seeks to be encouraged because probiotic bacteria will not be hazardous, even if released during filtration. The fundamental motive to present probiotics as a resource for sequestering NO may serve as multifunctional bioweapons for membrane remediation, which will virtually guarantee their long-term sustainability and green approach.
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Affiliation(s)
- Anuja Maitreya
- Environmental Biotechnology and Genomics Division (EBGD), CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur, 440 020, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Smita Pal
- Division of Endocrinology, CSIR -Central Drug Research Institute, Lucknow, 226031, India
| | - Asifa Qureshi
- Environmental Biotechnology and Genomics Division (EBGD), CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur, 440 020, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
| | - Reyed M Reyed
- Bioprocess Development Department, Genetic Engineering and Biotechnology Research Institute, City for Scientific Research and Applied Technology, New Borg Al Arab, Alexandria, Egypt
| | - Hemant J Purohit
- Environmental Biotechnology and Genomics Division (EBGD), CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur, 440 020, India
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9
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Wang M, Wang J, Jiang J. Membrane Fouling: Microscopic Insights into the Effects of Surface Chemistry and Roughness. ADVANCED THEORY AND SIMULATIONS 2021. [DOI: 10.1002/adts.202100395] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mao Wang
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117576 Singapore
| | - John Wang
- Department of Materials Science and Engineering National University of Singapore Singapore 117575 Singapore
| | - Jianwen Jiang
- Department of Chemical and Biomolecular Engineering National University of Singapore Singapore 117576 Singapore
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10
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Exploring the potential of photocatalytic dual layered hollow fiber membranes incorporated with hybrid titania nanotube-boron for agricultural wastewater reclamation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119136] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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11
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Matin A, Laoui T, Falath W, Farooque M. Fouling control in reverse osmosis for water desalination & reuse: Current practices & emerging environment-friendly technologies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 765:142721. [PMID: 33129530 DOI: 10.1016/j.scitotenv.2020.142721] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/22/2020] [Accepted: 09/22/2020] [Indexed: 05/26/2023]
Abstract
Reverse Osmosis (RO) is becoming increasingly popular for seawater desalination and wastewater reclamation. However, fouling of the membranes adversely impacts the overall process efficiency and economics. To date, several strategies and approaches have been used in RO plants and investigated at the laboratory-scale for their effectiveness in the control of different fouling types. Amid growing concerns and stringent regulations for the conservation of environment, there is an increasing trend to identify technologies that are effective in fouling mitigation as well as friendly to the environment. The present review elaborates on the different types of environment-friendly technologies for membrane fouling control that are currently being used or under investigation. It commences with a brief introduction to the global water crisis and the potential of membrane-based processes in overcoming this problem. This is followed by a section on membrane fouling that briefly describes the major fouling types and their impact on the membrane performance. Section 3 discusses the predominant fouling control/prevention strategies including feedwater pretreatment, membrane and spacer surface modification and membrane cleaning. The currently employed techniques are discussed together with their drawbacks, with some light being shed on the emerging technologies that have the ability to overcome the current limitations. The penultimate section provides a detailed discussion on a variety of eco-friendly/chemical free techniques investigated to control different fouling types. These include both control and prevention strategies, for example, bioflocculation and electromagnetic fields, as well as remediation techniques such as osmotic backwashing and gas purging. In addition, quorum sensing has been specifically discussed for biofouling remediation. The promising findings from different studies are presented followed by a discussion on their drawbacks and limitations. The review concludes with a need for carrying out fundamental studies to develop better understanding of the eco-friendly processes discussed in the penultimate section and their optimization for possible integration into the RO plants.
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Affiliation(s)
- Asif Matin
- Center of Research Excellence in Desalination & Water Treatment, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia; Center for Environment & Water, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
| | - Tahar Laoui
- Dept. of Mechanical & Nuclear Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates; Desalination Research Group, University of Sharjah, Sharjah 27272, United Arab Emirates.
| | - Wail Falath
- Center of Research Excellence in Desalination & Water Treatment, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia; Center for Environment & Water, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia; Dept. of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
| | - Mohammed Farooque
- Desalination Technologies Research Institute, Saline Water Conversion Corporation, Jubail, Saudi Arabia
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12
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The influence of membrane surface properties on the radionuclide mass transfer process in reverse osmosis. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117455] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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13
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Shang C, Pranantyo D, Zhang S. Understanding the Roughness-Fouling Relationship in Reverse Osmosis: Mechanism and Implications. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:5288-5296. [PMID: 32212689 DOI: 10.1021/acs.est.0c00535] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This paper investigates the relationship between roughness and fouling in reverse osmosis (RO) through specially designed experimental protocols and computational fluid dynamics (CFD) studies. Conventional polyamide thin-film composite membranes with a ridge-and-valley structure and an emerging type of smooth membranes are prepared. A wide range of foulants are used, and fouling under static, crossflow, and RO conditions are tested. Feature size on the membrane surface is important when foulants and the microscale structure show a similar size, and otherwise membrane-foulant interactions govern the static attachment. Under crossflow mode, fouling on the ridge-and-valley surface is not reduced to the same extent as that on smooth membranes, with the insufficient vortices in the valley region being identified as the key factor by CFD studies. In RO, uneven flux distribution as confirmed by gold nanoparticle filtration is also found to account for the much higher fouling rate of conventional membranes. Our study then suggests two strategies to design next-generation fouling-resistant RO membranes via structural optimization: first, a smooth selective layer should be maintained to ensure uniform flux distribution; second, one may mimic nature to fabricate patterned porous membranes as the support, so that it optimizes hydrodynamics while maintaining even fluxes.
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Affiliation(s)
- Chuning Shang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Dicky Pranantyo
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Sui Zhang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
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14
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Yin Z, Wen T, Li Y, Li A, Long C. Pre-ozonation for the mitigation of reverse osmosis (RO) membrane fouling by biopolymer: The roles of Ca 2+ and Mg 2. WATER RESEARCH 2020; 171:115437. [PMID: 31893554 DOI: 10.1016/j.watres.2019.115437] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 12/19/2019] [Accepted: 12/22/2019] [Indexed: 06/10/2023]
Abstract
Despite plenty of literatures focused on the application of pre-ozonation prior to membrane, it was still unclear about the role of divalent cations (Ca2+ and Mg2+) in reverse osmosis (RO) membrane fouling mitigation. In this study, ozone pre-treatment (0.10, 0.25 and 0.50 mg O3/mg DOC (dissolved organic carbon)) was employed to oxidize model biopolymer, which was represented by bovine serum albumin (BSA) and sodium alginate (SA) in the presence of Ca2+ and Mg2+ (0.5, 1.0 and 2.0 mM). Cross-flow filtration was conducted to investigate RO membrane fouling by concentration mode. The results showed that at appropriate ozone dose there were measurable changes in physicochemical properties of BSA and SA, including increases in particle size, hydrophilicity, density of negative charge and carboxylic groups. Pre-ozonation markedly alleviated RO fouling by BSA at ozone dose of 0.25 mg O3/mg DOC when Ca2+ and Mg2+ concentrations raised from 0.5 to 2.0 mM since the increase in electrostatic (EL) repulsion and decrease in hydrophobic (HP) interaction compensated the increase in divalent cation bridging. Similar results were obtained for SA fouling in the presence of Mg2+. In contrast, the effect of pre-ozonation on SA fouling strongly depended on the concentration of Ca2+. In brief, it mitigated SA fouling at 0.5 mM Ca2+, whereas accelerated irreversible fouling at higher Ca2+ concentration (1.0 and 2.0 mM) due to the overwhelming effect of divalent cation bridging compared to EL and HP interactions, as revealed by adsorption experiments (in-situ streaming potential measurement). Pre-ozonation shifted the fouling layer from compact to porous and weakened the adhesion forces between foulants and membrane (foulants) except for SA containing 1.0 and 2.0 mM Ca2+. This study may provide the guidance for the application of pre-ozonation prior to RO filtration.
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Affiliation(s)
- Zhonglong Yin
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Tiancheng Wen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Yan Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Aimin Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China
| | - Chao Long
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Avenue, Nanjing, 210023, China.
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15
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Subramaniam M, Goh P, Sevgili E, Karaman M, Lau W, Ismail A. Hydroxypropyl methacrylate thin film coating on polyvinylidene fluoride hollow fiber membranes via initiated chemical vapor deposition. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2019.109360] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Xue F, Tang B, Bin L, Ye J, Huang S, Fu F, Li P, Cui J. Residual micro organic pollutants and their biotoxicity of the effluent from the typical textile wastewater treatment plants at Pearl River Delta. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 657:696-703. [PMID: 30677935 DOI: 10.1016/j.scitotenv.2018.12.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 12/02/2018] [Accepted: 12/02/2018] [Indexed: 06/09/2023]
Abstract
This work investigated the biotoxicity and the residual dissolved organic matter (DOM) of the effluents from nine typical full-scale textile plants located at Pearl River Delta (PRD) in Guangdong province, China. The fluorescence regional integration (FRI) analysis showed that the tryptophan-like (II), soluble microbial product-like (IV) and fulvic acid-like substances (III) were the dominant compounds in the DOM. The acute toxicity test showed toxic effects still remained in most textile effluents, which might attribute to the undegraded dyes or aromatic compounds. Combining with the results from multiple methods, it indicated that the selected nine textile wastewater treatment plants (tWWTPs) all contained some residual micro organic pollutants in their effluents, and the residual benzene-derived products or aromatic amines were probably the toxicity-causing substances. Both ozonization and membrane filtration were capable of further decreasing the content of residual DOM, but by comprehensively considering the effects of removing DOM and biotoxicity, membrane filtration was better than ozonization.
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Affiliation(s)
- Feifei Xue
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangzhou 510006, PR China
| | - Bing Tang
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangzhou 510006, PR China.
| | - Liying Bin
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangzhou 510006, PR China
| | - Jianwen Ye
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangzhou 510006, PR China
| | - Shaosong Huang
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangzhou 510006, PR China
| | - Fenglian Fu
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangzhou 510006, PR China
| | - Ping Li
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangzhou 510006, PR China
| | - Jiao Cui
- School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangzhou 510006, PR China
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17
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Characterizing the roles of organic and inorganic foulants in RO membrane fouling development: The case of coal chemical wastewater treatment. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.09.062] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Veréb G, Kovács I, Zakar M, Kertész S, Hodúr C, László Z. Matrix effect in case of purification of oily waters by membrane separation combined with pre-ozonation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:34976-34984. [PMID: 29392609 DOI: 10.1007/s11356-018-1287-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 01/15/2018] [Indexed: 06/07/2023]
Abstract
In the present study, oil in water emulsions (coil = 100 ppm; doil droplets < 2 μm) was purified with ozonation followed by microfiltration using polyethersulfone (PES) membrane (dpore = 0.2 μm). The effects of pre-ozonation on membrane microfiltration were investigated in detail both in case of ultrapure and model groundwater matrices, applying different durations (0, 5, 10, and 20 min) of pre-ozonation. Simultaneously, the effects of added inorganic water components on the combined method were investigated. Size distribution of oil droplets, zeta potentials, fluxes, and purification efficiencies were measured and fouling mechanisms were described in all cases. It was found that the matrix significantly affected the size distribution and adherence ability of oil droplets onto the membrane surface, therefore fouling mechanisms also were strongly dependent on the matrix. In case of low salt concentration, the total resistance was caused mainly by reversible resistance, which could be significantly reduced (eliminated) by pre-ozonation. In case of model groundwater matrix, nearly twice higher total resistance was measured, and irreversible resistance was dominant, because of the higher adhesion ability of the oil droplets onto the membrane surface. In this case, pre-ozonation resulted in much lower irreversible, but higher reversible resistance. Increased duration of pre-ozonation raised the total resistance and reduced the elimination efficiency (due to fragmented oil droplets and water soluble oxidation by-products) in both cases, therefore short pre-ozonation can be recommended both from economic and performance aspects.
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Affiliation(s)
- Gábor Veréb
- Department of Process Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, Szeged, H-6725, Hungary.
| | - Ildikó Kovács
- Department of Process Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, Szeged, H-6725, Hungary
| | - Mihály Zakar
- Department of Process Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, Szeged, H-6725, Hungary
| | - Szabolcs Kertész
- Department of Process Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, Szeged, H-6725, Hungary
| | - Cecilia Hodúr
- Department of Process Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, Szeged, H-6725, Hungary
| | - Zsuzsanna László
- Department of Process Engineering, Faculty of Engineering, University of Szeged, Moszkvai krt. 9, Szeged, H-6725, Hungary
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19
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Todd CS, Heeschen WA. New Image Texture Analysis, and Application to Polymer Membrane Surface Morphologies and Roughness. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2018; 24:471-477. [PMID: 30231944 DOI: 10.1017/s1431927618015155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A new method of image texture analysis is presented, based on the mean and standard deviation of gray levels within domains in an image. The calculations are performed recursively on domains of various sizes within the images. These gray level calculations are used as the input matrix for principal component analysis. The technique analyzes the entire image as a whole and is not for image segmentation. The analysis routine operates across all distances, frequencies and directions in the image, and is not computationally burdensome. The method was applied to scanning electron microscope images of reverse osmosis membranes on domains from 23 nm to 3 µm. The texture analysis technique performed well in identifying the surface morphology and, once calibrated, in predicting the surface roughness as measured by atomic force microscopy.
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Affiliation(s)
- Clifford S Todd
- Analytical Science, Core R&D,The Dow Chemical Company,1897 Building,Midland, MI 48667,USA
| | - William A Heeschen
- Analytical Science, Core R&D,The Dow Chemical Company,1897 Building,Midland, MI 48667,USA
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