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Chen F, Liu X, Huang S. Asymmetric Wettability Janus Mesh via Electrostatic Printing for Selective Oil-Water and Emulsion Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:10676-10684. [PMID: 38736194 DOI: 10.1021/acs.langmuir.4c00623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2024]
Abstract
Janus mesh with two-sided asymmetric wettability shows high potential for selective oil-water and emulsion separation. However, it remains a challenge to construct Janus mesh structures with good stability and extremely asymmetric wettability. Herein, a novel Janus mesh with asymmetric wettability was structured by two different precursors, polydimethylsiloxane/zinc oxide (PDMS/ZnO) and zinc oxide-polyacrylonitrile/N,N-dimethylformamide (ZnO-PAN/DMF), by electrostatic printing, including electrostatic air spraying and electrostatic spinning. The prepared Janus mesh has special micro-nanostructures on two sides, including PDMS@ZnO and ZnO@PAN. On the basis of gravity, when the placement direction is changed, Janus mesh can effectively separate oil-water mixtures of different densities and surfactant-stabilized oil-water emulsions. Meanwhile, the obtained Janus mesh exhibited good separation efficiency (>96.3%) for various oil-water mixtures, and the flux was up to 2621 ± 30 L m-2 h-1. The Janus mesh was cycled 20 times with no weakening in separation efficiency, indicating satisfactory cycling stability. The Janus mesh displayed good stability under harsh conditions (acidic, alkaline, and high temperature). The Janus mesh can realize low energy input and long-lasting oil-water separation, which has widespread application prospects in intelligent oil-water separation. This top-down electrostatic printing strategy provides a way to construct Janus interface materials with practical applications.
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Affiliation(s)
- Fengjun Chen
- School of Intelligent Manufacturing and Electronic Engineering, Wenzhou University of Technology, Wenzhou, Zhejiang 325035, People's Republic of China
- National Engineering Research Center for High Efficiency Grinding, Hunan University, Changsha, Hunan 410082, People's Republic of China
| | - Xin Liu
- National Engineering Research Center for High Efficiency Grinding, Hunan University, Changsha, Hunan 410082, People's Republic of China
| | - Shuai Huang
- National Engineering Research Center for High Efficiency Grinding, Hunan University, Changsha, Hunan 410082, People's Republic of China
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2
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Avornyo A, Chrysikopoulos CV. Applications of graphene oxide (GO) in oily wastewater treatment: Recent developments, challenges, and opportunities. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 353:120178. [PMID: 38310795 DOI: 10.1016/j.jenvman.2024.120178] [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: 10/05/2023] [Revised: 01/06/2024] [Accepted: 01/20/2024] [Indexed: 02/06/2024]
Abstract
The treatment of oily wastewater has become a serious environmental challenge, for which graphene oxide has emerged as a promising material in solving the problem. The ever-growing utilization of graphene oxide (GO) in the treatment of oily wastewater necessitates a constant review. This review article employs a comprehensive literature survey methodology, systematically examining peer-reviewed articles, focusing on, but not entirely limited to, the last five years. Major databases such as EBSCOhost, Scopus, ScienceDirect, Web of Science and Google Scholar were searched using specific keywords related to GO and oily wastewater treatment. The inclusion criteria focused on studies that specifically address the application, efficiency, and mechanisms of GO in treating oily wastewater. The data extracted from these sources were then synthesized to highlight the most important developments, challenges, and prospects in this field. As far as oily wastewater treatment is concerned, the majority of the studies revolve around the use of GO in mitigating fouling in membrane processes, improving the stability, capacity and reusability of sorbents, and enhancing photodegradation by minimizing charge recombination.
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Affiliation(s)
- Amos Avornyo
- Department of Civil and Environmental Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Constantinos V Chrysikopoulos
- Department of Civil and Environmental Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates; School of Chemical and Environmental Engineering, Technical University of Crete, Chania, Greece.
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3
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Zhang H, Guo Z. Biomimetic materials in oil/water separation: Focusing on switchable wettabilities and applications. Adv Colloid Interface Sci 2023; 320:103003. [PMID: 37778250 DOI: 10.1016/j.cis.2023.103003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 09/19/2023] [Accepted: 09/21/2023] [Indexed: 10/03/2023]
Abstract
Clean water resources are crucial for human society, as the leakage and discharge of oily wastewater not only harm the economy but also disrupt our living environment. Therefore, there is an urgent need for efficient oil-water separation technology. Surfaces with switchable superwetting behavior have garnered significant attention due to their importance in both fundamental research and practical applications. This review introduces the fundamental principles of wettability in the oil-water separation process, the basic theory of switchable wettability, and the mechanisms involved in oil-water separation. Subsequently, the review discusses the research progress, challenges, and issues associated with three conventional types of special wettability materials: superhydrophobic/superoleophilic materials, superhydrophilic/superoleophobic materials, and superhydrophilic/underwater superoleophobic materials. Most importantly, it provides a detailed exploration of recent advancements in switchable wettability smart materials, which combine elements of traditional special wettability materials. These include stimulus-responsive smart materials, pre-wetting-induced materials, and Janus materials. The discussion covers key response factors, detailed examples of representative works, design concepts, and fabrication strategies. Finally, the review offers a comprehensive summary of switchable superwetting smart materials, encompassing their advantages and disadvantages, persistent challenges, and future prospects.
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Affiliation(s)
- Huimin Zhang
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, PR China
| | - Zhiguang Guo
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, PR China; State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China.
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4
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Jlassi K, Al Ejji M, Ahmed AK, Mutahir H, Sliem MH, Abdullah AM, Chehimi MM, Krupa I. A carbon dot-based clay nanocomposite for efficient heavy metal removal. NANOSCALE ADVANCES 2023; 5:4224-4232. [PMID: 37560431 PMCID: PMC10408590 DOI: 10.1039/d3na00334e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 06/16/2023] [Indexed: 08/11/2023]
Abstract
Carbon dots and their derivatives with fascinating photoluminescence properties have recently attracted tremendous scientific attention. This work describes the preparation of novel fluorescent bentonite clay (B), modified with carbon dot nanomaterials (CDs), and its usage as a lead removal platform. The CDs were prepared using a hydrothermal method from graphitic waste which served as the carbon source material. The as-obtained CDs were found to be fluorescent, being spherical in shape, positively charged, and smaller than 5 nm. Encouraged by their structure and photoluminescence features, they were used as surface modifiers to make fluorescent bentonite nanocomposites. Bentonite was used as a negatively charged model of aluminosilicate and reacted with the positively charged CDs. XRD, FTIR, XPS, and fluorescence analysis were used to characterize the prepared materials. The results indicate that the CDs intercalated inside the bentonite matrix were stable with excellent optical properties over time. They were finally used as an efficient hybrid platform for lead removal with a removal efficiency of 95% under light conditions, at room temperature, in an alkaline medium, and after only 10 min of reaction, compared to 70% under dark conditions. The pseudo-second-order kinetics and Langmuir isotherm models were better fitted to describe the adsorption process. The maximum adsorption capacity was equal to 400 mg g-1 toward Pb(ii) removal, at room temperature and pH = 8, under light conditions. To summarize, we have designed UV light stimuli responsive carbon dot-intercalated clay with high Pb(ii) adsorption capacity and long-term stability.
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Affiliation(s)
- Khouloud Jlassi
- Center for Advanced Materials, Qatar University P.O. Box 2713 Doha Qatar
| | - Maryam Al Ejji
- Center for Advanced Materials, Qatar University P.O. Box 2713 Doha Qatar
| | | | - Hafsa Mutahir
- Department of Chemical Engineering, College of Engineering, Qatar University Doha 2713 Qatar
| | - Mostafa H Sliem
- Center for Advanced Materials, Qatar University P.O. Box 2713 Doha Qatar
| | | | - Mohamed M Chehimi
- Université de Paris, ITODYS, UMR CNRS 7086 15 rue JA de Baïf 75013 Paris France
| | - Igor Krupa
- Center for Advanced Materials, Qatar University P.O. Box 2713 Doha Qatar
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5
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Chen S, Zheng Z, Liu H, Wang X. Highly Efficient, Antibacterial, and Salt-Resistant Strategy Based on Carbon Black/Chitosan-Decorated Phase-Change Microcapsules for Solar-Powered Seawater Desalination. ACS APPLIED MATERIALS & INTERFACES 2023; 15:16640-16653. [PMID: 36951291 DOI: 10.1021/acsami.2c21298] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Solar-powered interfacial evaporation has been recognized to be a promising and sustainable technology for seawater desalination, in view of the challenge of freshwater scarcity and fossil energy storage. Nevertheless, current cutting-edge interfacial evaporation systems mostly ignore the issues of intermittent solar irradiation and bacterial contamination. We have hereby developed a novel type of an interfacial evaporator equipped with carbon black (CB)/chitosan (CS)-decorated phase-change microcapsules as a multifunctional photothermal material for solar-powered seawater desalination, based on a highly efficient, antibacterial, and salt-resistant multipurpose strategy. In the developed microcapsules, an n-docosane phase-change material (PCM) core was engulfed in a TiO2 shell, followed by surface decorating a CB/CS nanocomposite layer. A high thermal energy-storage capacity of more than 140 J g-1 was achieved, thanks to tight sealing of n-docosane as a PCM core in the perfect core-shell structured microcapsules. Moreover, a rational combination of CS and CB nanoparticles not only contributes an extremely high solar absorption efficiency of 95.04% and good wettability to the as-synthesized microcapsules, but also imparts outstanding antibacterial and salt-resistant abilities to them. These innovative designs enable the developed evaporator to gain a high evaporation rate of 2.58 kg m-2 h-1, along with an evaporation efficiency higher than 90% for consecutive and stable evaporation of seawater under intermittent solar illumination. Compared to conventional evaporators without a PCM, there is an increase by 1.03 kg m-2 in the total water production of the develop evaporator under natural solar illumination for 8 h on a semicloudy day. The resultant evaporated water presents good vegetation compatibility to meet the requirement of crop growth for agricultural cultivation. This work provides a new pathway for designing and developing the high-performance interfacial evaporators with prominent antibacterial and salt-resistant abilities to produce purified water through solar-powered sustainable seawater desalination.
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Affiliation(s)
- Si Chen
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhiheng Zheng
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Huan Liu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiaodong Wang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
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6
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Janwery D, Memon FH, Memon AA, Iqbal M, Memon FN, Ali W, Choi KH, Thebo KH. Lamellar Graphene Oxide-Based Composite Membranes for Efficient Separation of Heavy Metal Ions and Desalination of Water. ACS OMEGA 2023; 8:7648-7656. [PMID: 36872981 PMCID: PMC9979334 DOI: 10.1021/acsomega.2c07243] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
Sufficient efforts have been carried out to fabricate highly efficient graphene oxide (GO) lamellar membranes for heavy metal ion separation and desalination of water. However, selectivity for small ions remains a major problem. Herein, GO was modified by using onion extractive (OE) and a bioactive phenolic compound, i.e., quercetin. The as-prepared modified materials were fabricated into membranes and used for separation of heavy metal ions and water desalination. The GO/onion extract (GO/OE) composite membrane with a thickness of 350 nm shows an excellent rejection efficiency for several heavy metal ions such as Cr6+ (∼87.5%), As3+ (∼89.5%), Cd2+ (∼93.0%), and Pb2+ (∼99.5%) and a good water permeance of ∼460 ± 20 L m-2 h-1 bar-1. In addition, a GO/quercetin (GO/Q) composite membrane is also fabricated from quercetin for comparative studies. Quercetin is an active ingredient of onion extractives (2.1% w/w). The GO/Q composite membranes show good rejection up to ∼78.0, ∼80.5, ∼88.0, and 95.2% for Cr6+, As3+, Cd2+, and Pb2+, respectively, with a DI water permeance of ∼150 ± 10 L m-2 h-1 bar-1. Further, both membranes are used for water desalination by measuring rejection of small ions such as NaCl, Na2SO4, MgCl2, and MgSO4. The resulting membranes show >70% rejection for small ions. In addition, both membranes are used for filtration of Indus River water and the GO/Q membrane shows remarkably high separation efficiency and makes river water suitable for drinking purpose. Furthermore, the GO/QE composite membrane is highly stable up to ∼25 days under acidic, basic, and neutral environments as compared to GO/Q composite and pristine GO-based membranes.
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Affiliation(s)
- Dahar Janwery
- National
Centre of Excellence in Analytical Chemistry (NCEAC), University of Sindh, Jamshoro 76060, Pakistan
| | - Fida Hussain Memon
- Department
of Mechatronics Engineering, Jeju National
University, Jeju 63243, Republic of Korea
- Department
of Electrical Engineering, Sukkur IBA University, Sukkur 65200, Sindh, Pakistan
| | - Ayaz Ali Memon
- National
Centre of Excellence in Analytical Chemistry (NCEAC), University of Sindh, Jamshoro 76060, Pakistan
| | - Muzaffar Iqbal
- Department
of Chemistry, Faculty of Physical and Applied Sciences, The University of Haripur KPK, Haripur 22620, Pakistan
| | - Fakhar Nisa Memon
- Department
of Chemistry, University of Karachi, Karachi 75270, Sindh, Pakistan
| | - Wajid Ali
- Department
of Mechatronics Engineering, Jeju National
University, Jeju 63243, Republic of Korea
| | - Kyung-Hyun Choi
- Department
of Mechatronics Engineering, Jeju National
University, Jeju 63243, Republic of Korea
| | - Khalid Hussain Thebo
- Institute
of Metal Research, Chinese Academy of Sciences
(UCAS), Shenyang 110016, China
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7
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Zhang S, Su Q, Yan J, Wu Z, Tang L, Xiao W, Wang L, Huang X, Gao J. Flexible nanofiber composite membrane with photothermally induced switchable wettability for different oil/water emulsions separation. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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8
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Lopez-Fernandez M, Tariq S, Naseem K, Ahmad A, Khan S, Younas U, Javed MS, Fan WS, Luque R, Ali S. Graphene based composite membranes for environmental toxicology remediation, critical approach towards environmental management. CHEMOSPHERE 2022; 307:136034. [PMID: 36029855 DOI: 10.1016/j.chemosphere.2022.136034] [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: 06/23/2022] [Revised: 07/23/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
Graphene-based composite membranes, as laminated, stacked, and assembled architectures of graphene, have surpassed other conventional membranes with their advanced and preeminent structural specialization and potential use in a wide range of sustainable and environmental applications. The characteristic membrane features such as distinct laminar morphology, tailored physicochemical properties, as well as extraordinary molecular properties have fascinated scientists. Due to remarkable mechanical properties, these membranes can be easily fabricated. Recent progress has been achieved by graphene and its derivatives-based membranes to purify water and gases for environmental remediation. This review explained the latest and groundbreaking advances in chemical design, fabrication, and application of graphene-based membranes. Special attention is paid to the recent developments on graphene-based composites into membranes with various forms: free-standing, layered, and graphene-based nanocomposite membranes. Furthermore, a unique approach on environmental management with as-fabricated membranes is provided by discussing the effect of physicochemical properties. Consequently, their full-scale use for environmental management, water purification, gas purification, and biological treatments will pave the way for their promising features and realize their future prospects.
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Affiliation(s)
- Miriam Lopez-Fernandez
- Departamento de Quimica Organica, Universidad de Cordoba, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, E14014, Cordoba, Spain
| | - Sadaf Tariq
- Department of Biochemistry, Government College University, Faisalabad, 38000, Pakistan
| | - Khalida Naseem
- Department of Basic and Applied Chemistry, Faculty of Science and Technology, University of central punjab, Lahore, Pakistan
| | - Awais Ahmad
- Departamento de Quimica Organica, Universidad de Cordoba, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, E14014, Cordoba, Spain
| | - Safia Khan
- Department of Chemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Umer Younas
- Department of Chemistry, The University of Lahore, Lahore, 54590, Pakistan
| | - Muhammad Sufyan Javed
- School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, PR China.
| | - Wong Siew Fan
- Department of Petroleum Engineering, School of Engineering, Asia Pacific University of Technology & Innovation, 57000, Kuala Lumpur, Malaysia
| | - Rafael Luque
- Departamento de Quimica Organica, Universidad de Cordoba, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, E14014, Cordoba, Spain; Peoples Friendship University of Russia (RUDN University), 6 Miklukho Maklaya str., 117198, Moscow, Russian Federation.
| | - Shafaqat Ali
- Department of Environmental Sciences & Engineering, Government College University, Faisalabad, 38000, Pakistan; Department of Biological Sciences and Technology, China Medical University, Taichung, 40402, Taiwan.
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Zhang L, Liu Y, Zeng G, Yang Z, Lin Q, Wang Y, Wang X, Pu S. Two-dimensional Na-Bentonite@MXene composite membrane with switchable wettability for selective oil/water separation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Wetting-induced superlyophobic polyacrylonitrile membranes: From reversible wettability to switchable on-demand emulsion separation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Liu C, Peng Y, Huang C, Ning Y, Shang J, Li Y. Bioinspired Superhydrophobic/Superhydrophilic Janus Copper Foam for On-Demand Oil/Water Separation. ACS APPLIED MATERIALS & INTERFACES 2022; 14:11981-11988. [PMID: 35220721 DOI: 10.1021/acsami.2c00585] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Superwettable Janus membranes with unique interfacial characteristics have versatile applications in oil/water separation, microfluid transportation, and membrane distillation. However, it remains a significant challenge to simply fabricate three-dimensional (3D) metallic foams with Janus superwettability using a facile and environment-friendly method. In this study, a novel method is present to construct a Janus copper foam (CF) by combining superhydrophobicity and superhydrophilicity into CF. Based on gravity, the water in the light oil (LO)/water mixture can be transported from the superhydrophilic (SHL) side to the superhydrophobic (SHB) side, while the heavy oil (HO) in the HO/water/mixture can be transported from the SHB side to the SHL side. Therefore, cylindrical Janus oil/water separation devices with superior separation efficiency and excellent repeatability can achieve on-demand oil/water separation effortlessly. This design and fabrication method offers a novel avenue for the preparation of Janus interface materials for practical applications in liquid transportation, sensor devices, energy materials, and oil spills.
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Affiliation(s)
- Chunhua Liu
- Engineering Research Center of Jiangxi Province for Bamboo-based Advanced Materials and Biomass Conversion, School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Yun Peng
- Engineering Research Center of Jiangxi Province for Bamboo-based Advanced Materials and Biomass Conversion, School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Conglin Huang
- Engineering Research Center of Jiangxi Province for Bamboo-based Advanced Materials and Biomass Conversion, School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Yuzhen Ning
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology, School of Chemistry, Beihang University, Beijing 100191, P. R. China
| | - Jiaoping Shang
- Engineering Research Center of Jiangxi Province for Bamboo-based Advanced Materials and Biomass Conversion, School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Yibao Li
- Engineering Research Center of Jiangxi Province for Bamboo-based Advanced Materials and Biomass Conversion, School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou 341000, P. R. China
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12
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Elakkiya S, Arthanareeswaran G. Evaluation of membrane tailored with biocompatible halloysite‒polyaniline nanomaterial for efficient removal of carcinogenic disinfection by‒products precursor from water. ENVIRONMENTAL RESEARCH 2022; 204:112408. [PMID: 34800534 DOI: 10.1016/j.envres.2021.112408] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/12/2021] [Accepted: 11/13/2021] [Indexed: 06/13/2023]
Abstract
Humic acid (HA) is the main component of natural organic matter that generates carcinogenic by‒products during disinfection and its removal from water resources is challenging. Biocompatible halloysite (HNTs) nanomaterial decorated with polyaniline (HNTs‒PANI) was synthesized via polymerization technique. HNTs‒PANI was added to prepare polyethersulfone mixed matrix membranes (MMMs). The influence of HNTs‒PANI concentration on HA removal efficiency was studied by varying the HNTs‒PANI (0.5, 1 and 1.5 wt%). The characterization studies of MMMs revealed that the addition of HNTs‒PANI improved the morphology of the membranes, surface properties, chemical stability and thermal property. The amine and hydroxyl groups within the MMMs improved the membrane wettability. The addition of HNTs‒PANI within the MMMs had significantly enhanced the pure water flux and HA filtration. YHP2 MMM with 1 wt% of HNTs‒PANI demonstrated sieving coefficient of 0.10 and the highest HA removal efficiency of 91% greater than the neat PES membrane. Furthermore, the antifouling property of the MMMs was studied using HA as foulant. 1 wt% of HNTs‒PANI added MMM showed a high flux recovery ratio (94.9%) with low total fouling of 12% and low irreversible fouling of 5%, respectively. Thus, HNTs‒PANI was an efficient nanomaterial for enhancing the pure water flux, removal efficiency and antifouling property to treat water contaminated with HA.
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Affiliation(s)
- S Elakkiya
- Membrane Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, 620015, India
| | - G Arthanareeswaran
- Membrane Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, 620015, India.
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13
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Wang J, Ma X, Su L, Zhang C, Dong X, Teng C, Jiang L, Yu C. Eco-friendly perforated kelp membrane with high strength for efficient oil/water separation in a complex environment. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120114] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Wang J, Yu Z, Zhu X, Xiao X, Pang Y, Tan Q, Liu Y. A super-hydrophilic NH 2-MIL-125 composite film with dopamine-modified graphene oxide is used for water treatment. NEW J CHEM 2022. [DOI: 10.1039/d2nj02181a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It is always concerning about how to remove oil–water emulsions and dyes simultaneously and how to find a suitable separation film.
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Affiliation(s)
- Juan Wang
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
| | - Zongxue Yu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- Southwest Petr Univ, Res Inst Ind Hazardous Waste Disposal & Resource, Chengdu 610500, Sichuan, P. R. China
| | - Ximei Zhu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
| | - Xuehan Xiao
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
| | - Yao Pang
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
| | - QiuYue Tan
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
| | - Yucheng Liu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
- Southwest Petr Univ, Res Inst Ind Hazardous Waste Disposal & Resource, Chengdu 610500, Sichuan, P. R. China
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15
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Liu D, Wang S, Wu T, Li Y. A Robust Superhydrophobic Polyurethane Sponge Loaded with Multi-Walled Carbon Nanotubes for Efficient and Selective Oil-Water Separation. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:3344. [PMID: 34947693 PMCID: PMC8707185 DOI: 10.3390/nano11123344] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 12/04/2022]
Abstract
The influence of different coupling agents and coupling times on the wettability of a polyurethane (PU) sponge surface were optimized. Octadecyltrichlorosilane (OTS) was selected as the optimal coupling agent to prepare the superhydrophobic sponge. The superhydrophobic sponge was prepared in one step, which has the advantages of simple operation and enhanced durability. The superhydrophobic sponge was characterized by scanning electron microscopy, Teclis Tracker tensiometry, and Fourier transform infrared (FT-IR) spectrophotometry. The water contact angle increased from 64.1° to 151.3°, exhibiting ideal superhydrophobicity. Oils and organic solvents with different viscosities and densities can be rapidly and selectively absorbed by superhydrophobic sponges, with an absorption capacity of 14.99 to 86.53 times the weight of the sponge itself, without absorbing any water. Since temperature affects the viscosity and ionic strength of oil, and influences the surface wettability of the sponges, the effect of temperature and ionic strength on the oil absorption capacity of the superhydrophobic sponges was measured, and its mechanism was elucidated. The results showed that the absorptive capacity retained more than 90% of the initial absorptive capacity after repeated use for 10 times. Low-cost, durable superhydrophobic sponges show great potential for large-scale oil-water separation.
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Affiliation(s)
- De Liu
- Shandong Provincial Research Center for Water Pollution Control, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China;
| | - Shiying Wang
- Key Laboratory of Colloid and Interface Science of Education Ministry, Shandong University, Jinan 250100, China;
| | - Tao Wu
- Key Laboratory of Colloid and Interface Science of Education Ministry, Shandong University, Jinan 250100, China;
| | - Yujiang Li
- Shandong Provincial Research Center for Water Pollution Control, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China;
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Influence of Membrane Vibration on Particles Rejection Using a Slotted Pore Membrane Microfiltration. MEMBRANES 2021; 11:membranes11090709. [PMID: 34564526 PMCID: PMC8470867 DOI: 10.3390/membranes11090709] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/07/2021] [Accepted: 09/10/2021] [Indexed: 11/24/2022]
Abstract
A new method is proposed to increase the rejection in microfiltration by applying membrane oscillation, using a new type of microfiltration membrane with slotted pores. The oscillations applied to the membrane surface result in reduced membrane fouling and increased separation efficiency. An exact mathematical solution of the flow in the surrounding solution outside the oscillating membrane is developed. The oscillation results in the appearance of a lift velocity, which moves oil particles away from the membrane. The latter results in both reduced membrane fouling and increased oil droplet rejection. This developed model was supported by the experimental results for oil water separation in the produced water treatment. It was proven that the oil droplet concentration was reduced notably in the permeate, due to the membrane oscillation, and that the applied shear rate caused by the membrane oscillation also reduced pore blockage. A four-times lower oil concentration was recorded in the permeate when the membrane vibration frequency was 25 Hz, compared to without membrane vibration. Newly generated microfiltration membranes with slotted pores were used in the experiments.
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