1
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Runlin H, Chaoyue W, Congcong B, Hanli W. Facile preparation of high performance GO/Mn 3O 4/PVDF composite membranes with intercalation of manganese oxide nanowires. RSC Adv 2023; 13:19002-19010. [PMID: 37362331 PMCID: PMC10285357 DOI: 10.1039/d3ra02594b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 06/17/2023] [Indexed: 06/28/2023] Open
Abstract
Polyvinylidene fluoride (PVDF) has been widely studied and applied in separation membranes due to its high thermal and chemical stability and mechanical strength. However, PVDF has strong hydrophobicity, resulting in easy contamination of the membrane surface and fast flux attenuation, so it is necessary to modify the membrane surface to improve its separation selectivity and service life. In this paper, PVDF microporous membrane was used as the matrix material and graphene oxide (GO) as the separation layer material. The GO/Mn3O4/PVDF composite membrane was prepared by layer self-assembly of GO nanosheets, and the functional layer spacing was adjusted by nanometer Mn3O4 intercalation. The prepared composite membrane showed high flux and separation selectivity in the filtration of organic compounds. The results showed that the rejection of methylene blue increased from 34% to 99.5%, and the flux decreased from 3000 L m-2 h-1 to 95 L m-2 h-1 when GO nanosheets covered the PVDF supporting membrane. After the introduction of Mn3O4 nanowires in the GO interlayer, the dye rejection reached 99.9% and the flux reached 612 L m-2 h-1. Compared with the unintercalated composite membranes, the flux of the prepared composite membranes showed good stability in the treatment of methylene blue, and the rejection remained unchanged.
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Affiliation(s)
- Han Runlin
- School of Chemistry and Chemical Engineering, Jinggangshan University Ji'an 343009 China
| | - Wang Chaoyue
- School of Chemistry and Chemical Engineering, Jinggangshan University Ji'an 343009 China
| | - Bi Congcong
- Shandong Huaxia Shenzhou New Material Co., Ltd. Zibo 256400 China
| | - Wang Hanli
- Shandong Huaxia Shenzhou New Material Co., Ltd. Zibo 256400 China
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2
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Wang T, Bachs ES, de Grooth J, de Vos WM. Advanced Oxidation Processes Coupled to Nanofiltration Membranes with Catalytic Fe 0 Nanoparticles in Symmetric and Asymmetric Polyelectrolyte Multilayers. MEMBRANES 2023; 13:388. [PMID: 37103815 PMCID: PMC10141899 DOI: 10.3390/membranes13040388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 06/19/2023]
Abstract
The in situ synthesis of Fe0 particles using poly-(acrylic acid) (PAA) is an effective tool for fabricating catalytic membranes relevant to advanced oxidation processes (AOPs). Through their synthesis in polyelectrolyte multilayer-based nanofiltration membranes, it becomes possible to reject and degrade organic micropollutants simultaneously. In this work, we compare two approaches, where Fe0 nanoparticles are synthesized in or on symmetric multilayers and asymmetric multilayers. For the membrane with symmetric multilayers (4.0 bilayers of poly (diallyldimethylammonium chloride) (PDADMAC)/PAA), the in situ synthesized Fe0 increased its permeability from 1.77 L/m2/h/bar to 17.67 L/m2/h/bar when three Fe2+ binding/reducing cycles were conducted. Likely, the low chemical stability of this polyelectrolyte multilayer allows it to become damaged through the relatively harsh synthesis. However, when the in situ synthesis of Fe0 was performed on top of asymmetric multilayers, which consist of 7.0 bilayers of the very chemically stable combination of PDADMAC and poly(styrene sulfonate) (PSS), coated with PDADMAC/PAA multilayers, the negative effect of the Fe0 in situ synthesized can be mitigated, and the permeability only increased from 1.96 L/m2/h/bar to 2.38 L/m2/h/bar with three Fe2+ binding/reducing cycles. The obtained membranes with asymmetric polyelectrolyte multilayers exhibited an excellent naproxen treatment efficiency, with over 80% naproxen rejection on the permeate side and 25% naproxen removal on the feed solution side after 1 h. This work demonstrates the potential of especially asymmetric polyelectrolyte multilayers to be effectively combined with AOPs for the treatment of micropollutants (MPs).
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3
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Kumar A, Ghosh UK. Preparation of novel Polyvinylidene fluoride/boehmite composite membrane made using nonsolvent induced phase separation method for arsenate ion removal from water. POLYM ENG SCI 2023. [DOI: 10.1002/pen.26247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
- Anil Kumar
- Department of Polymer and Process Engineering Indian Institute of Technology Roorkee Saharanpur India
| | - Uttam Kumar Ghosh
- Department of Polymer and Process Engineering Indian Institute of Technology Roorkee Saharanpur India
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4
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Fabrication of antifouling two-dimensional MoS2 layered PVDF membrane: Experimental and density functional theory calculation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Thamizhlarasan A, Vignesh R, Anbarasan R, Tung K. Synthesis and characterization of functionalized polyvinylidene fluoride (
PVDF)
and the high temperature catalytic activity of
PVDF‐
g
‐MAH
/
V
2
O
5
nanocomposite toward transesterification reaction. POLYM ENG SCI 2022. [DOI: 10.1002/pen.26081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anbarasan Thamizhlarasan
- Department of Polymer Technology KCET Madurai India
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
| | - Ramamoorthi Vignesh
- Department of Polymer Technology KCET Madurai India
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
| | - Ramasamy Anbarasan
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
| | - Kuo‐Lun Tung
- Department of Chemical Engineering National Taiwan University Taipei Taiwan
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6
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Yang C, Li K, Xu L, Wang Z, Yu L, Wang J. Reduction of nitrobenzene by a zero-valent iron microspheres/polyvinylidene fluoride (mZVI/PVDF) membrane. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120006] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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7
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Silva LL, Abdelraheem W, Nadagouda MN, Rocco AM, Dionysiou DD, Fonseca FV, Borges CP. Novel microwave-driven synthesis of hydrophilic polyvinylidene fluoride/polyacrylic acid (PVDF/PAA) membranes and decoration with nano zero-valent-iron (nZVI) for water treatment applications. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118817] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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He Z, Mahmud S, Yang Y, Zhu L, Zhao Y, Zeng Q, Xiong Z, Zhao S. Polyvinylidene fluoride membrane functionalized with zero valent iron for highly efficient degradation of organic contaminants. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117266] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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9
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Detisch MJ, John Balk T, Bezold M, Bhattacharyya D. Nanoporous metal-polymer composite membranes for organics separations and catalysis. JOURNAL OF MATERIALS RESEARCH 2020; 35:2629-2642. [PMID: 37539433 PMCID: PMC10399685 DOI: 10.1557/jmr.2020.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Metallic thin-film composite membranes are produced by sputtering metal films onto commercial polymer membranes. The separations capability of the membrane substrate is enhanced with the addition of a 10 nm Ta film. The addition of a tantalum layer decreases the molecular weight cutoff of the membrane from 70 kDa dextran (19 nm) to below 5 kDa (6 nm). Water flux drops from 168 LMH/bar (LMH: liters/meters2/hour) (polymer support) to 8.8 LMH/bar (Ta composite). A nanoporous layer is also added to the surface through Mg/Pd film deposition and dealloying. The resulting nanoporous Pd is a promising catalyst with a ligament size of 4.1 ± 0.9 nm. The composite membrane's ability to treat water contaminated with chlorinated organic compounds (COCs) is determined. When pressurized with hydrogen gas, the nanoporous Pd composite removes over 70% of PCB-1, a model COC, with one pass. These nanostructured films can be incorporated onto membrane supports enabling diverse reactions and separations.
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Affiliation(s)
- Michael J. Detisch
- Department of Chemical & Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Thomas John Balk
- Department of Chemical & Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Mariah Bezold
- Department of Chemical & Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Dibakar Bhattacharyya
- Department of Chemical & Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
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10
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Saad A, Mills R, Wan H, Ormsbee L, Bhattacharyya D. Thermoresponsive PNIPAm–PMMA-Functionalized PVDF Membranes with Reactive Fe–Pd Nanoparticles for PCB Degradation. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c03260] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anthony Saad
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046, United States
| | - Rollie Mills
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046, United States
| | - Hongyi Wan
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046, United States
| | - Lindell Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, Kentucky 40506-0046, United States
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046, United States
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11
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Nasir AM, Ishak NH, Said MSM, Dzahir IHM. One-pot synthesis of molecular-imprinted membrane for selective extraction of caffeic acid. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-019-02935-4] [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]
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12
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Saad A, Mills R, Wan H, Mottaleb MA, Ormsbee L, Bhattacharyya D. Thermo-responsive adsorption-desorption of perfluoroorganics from water using PNIPAm hydrogels and pore functionalized membranes. J Memb Sci 2020; 599. [PMID: 32095035 DOI: 10.1016/j.memsci.2020.117821] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Perfluorochemicals (PFCs) are emerging contaminants in various water sources. Responsive polymers provide a new avenue for PFC adsorption/desorption from water. Poly-N-isopropylacrylamide's (PNIPAm's) temperature-responsive behavior and hydrophilic/hydrophobic transition is leveraged for reversible adsorption and desorption of PFCs. Adsorption of PFOA (perfluoro-octanoic acid) onto PNIPAm hydrogels yielded Freundlich distribution coefficients (Kd) of 0.073 L/g at 35 °C (above LCST) and 0.026 L/g at 22°C. Kinetic studies yielded second order rate constants (k2) of 0.012 g/mg/h for adsorption and 12.6 g/mg/h for desorption, with initial rates of 28 mg/g/h and 41 mg/g/h, respectively. Interaction parameters of PNIPAm's functional groups in its different conformational states, as well as the hydrophobic fluorinated carbon tails and hydrophilic head groups of PFOA are used to describe relative adsorption. Polyvinylidene difluoride (PVDF) provides a robust membrane structure for the commercial viability of polymeric adsorbents. Temperature swing adsorption of PFOA using PNIPAm functionalized PVDF membrane pores showed consistent adsorption and desorption capacity over 5 cycles. PFOA desorption percentage of 60% was obtained in pure water at temperatures below PNIPAm's lower critical solution temperature (LCST) while 13% desorption was obtained at temperatures above the LCST, thus showing the importance of the LCST on desorption performance.
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Affiliation(s)
- Anthony Saad
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Rollie Mills
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Hongyi Wan
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - M Abdul Mottaleb
- College of Medicine, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Lindell Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
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13
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Hou X, Chen X, Bi S, Li K, Zhang C, Wang J, Zhang W. Catalytic degradation of TCE by a PVDF membrane with Pd-coated nanoscale zero-valent iron reductant. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 702:135030. [PMID: 31715394 DOI: 10.1016/j.scitotenv.2019.135030] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/13/2019] [Accepted: 10/16/2019] [Indexed: 06/10/2023]
Abstract
Trichloroethylene (TCE) has serious threat to ecosystem. Fe-Pd nanoparticles (NPs) are good materials for catalytic degradation of TCE but still face severe challenges including easy fouling, agglomeration, deactivation and difficult separation and reuse etc. To overcome these drawbacks, we have constructed a novel structured PVDF/Fe-Pd NPs composite membrane with nanosized surface pores to execute the TCE degradation. Results indicate the degradation shows pseudo first-order reaction kinetics and high degradation rate in the static state degradation. Furthermore, the degradation ability can be enhanced by increasing Fe and Pd contents, the degradation temperature or decreasing the degradation pH value. However, the degradation is essentially limited by the diffusion. Thus, the cross-flow degradation is further applied to promote the diffusion. By this operating model, the degradation ability of the composite membrane can be greatly improved. More importantly, the reactants always keep the purity in the membrane surface side and can be controlled to enter the membrane pore for catalytic degradation. Thus, products can be timely discharged via the membrane pores and the side reactions between reactants and products can be largely reduced. In addition, the nanosized surface pores can also prevent the Fe-Pd NPs from being fouled. In a word, the novel composite membrane shows strong degradation ability, good stability and convenient operating ability for the TEC catalytic degradation.
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Affiliation(s)
- Xiaolu Hou
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Xi Chen
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China.
| | - Shiyin Bi
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Kun Li
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Chenghao Zhang
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Jianzu Wang
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China.
| | - Wangqing Zhang
- Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, PR China
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14
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Yan C, Zhang Y, Da Z, Wie Y, Li B, Meng M, Yuan S, Yan Y. Synthesis and Evaluation of Acid‐base Bi‐functional MOFs Catalyst Supported on PVDF Membrane for Glucose Dehydration to 5‐HMF. ChemistrySelect 2019. [DOI: 10.1002/slct.201903356] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Changhao Yan
- Research Center of Fluid Machinery Engineering and TechnologyJiangsu University Xuefu Road 301# Zhenjiang 212013 PR China
| | - Yunlei Zhang
- Institute of Green Chemistry and Chemical TechnologySchool of Chemistry and Chemical EngineeringJiangsu University Xuefu Road 301# Zhenjiang 212013 PR China
| | - Zulin Da
- Institute of Green Chemistry and Chemical TechnologySchool of Chemistry and Chemical EngineeringJiangsu University Xuefu Road 301# Zhenjiang 212013 PR China
| | - Yanan Wie
- Institute of Green Chemistry and Chemical TechnologySchool of Chemistry and Chemical EngineeringJiangsu University Xuefu Road 301# Zhenjiang 212013 PR China
| | - Bing Li
- Institute of Green Chemistry and Chemical TechnologySchool of Chemistry and Chemical EngineeringJiangsu University Xuefu Road 301# Zhenjiang 212013 PR China
| | - Minjia Meng
- Institute of Green Chemistry and Chemical TechnologySchool of Chemistry and Chemical EngineeringJiangsu University Xuefu Road 301# Zhenjiang 212013 PR China
| | - Shouqi Yuan
- Research Center of Fluid Machinery Engineering and TechnologyJiangsu University Xuefu Road 301# Zhenjiang 212013 PR China
| | - Yongsheng Yan
- Institute of Green Chemistry and Chemical TechnologySchool of Chemistry and Chemical EngineeringJiangsu University Xuefu Road 301# Zhenjiang 212013 PR China
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15
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Evaluation of Nano Zero-Valent Iron (nZVI) Activity in Solution and Immobilized in Hydrophilic PVDF Membrane for Drimaren Red X-6BN and Bisphenol-a Removal in Water. Processes (Basel) 2019. [DOI: 10.3390/pr7120904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Fenton reactions that involve nano zero-valent iron (nZVI) have shown high promise in the removal of organic pollutants. In this work, nZVI stabilized with carboxymethyl cellulose (CMC) was evaluated for drimaren red X-6BN (DRX-6BN, 10 mg/L) and bisphenol-a (BPA, 800 mg/L) removal. Oxidation reactions were conducted for removal of both compounds by varying nZVI/CMC concentration (0.01–5 g/L), hydrogen peroxide (H2O2, 0.01–0.1 g/L), and pH (3–9). DRX-6BN degradation rate was the highest (kinetic constant (kobs) = 4.622 h−1) when working at pH 3 and 3 g/L of nZVI/CMC. Increasing H2O2 concentration could not improve the reaction. For BPA, all the conditions tested showed removals of more than 96% with 0.02 g/L of H2O2. This result was compared with the activity of nZVI loaded in hydrophilic PVDF (Polyvinylidene fluoride) membranes by polyacrylic acid (PAA) to entrap nanoparticles to the membrane surface. As expected, the attachment of nZVI onto the membranes diminished nanoparticles’ activity; however, it is important to highlight the need for preparing a stable catalytic membrane, which could enhance pollutant removal of microfiltration membranes’ systems. This was confirmed by the percentage of iron leaching from functionalized membranes, where a higher concentration of iron in the bulk solution leads to enhancement on BPA removal. Issues with BPA diffusion resistance inside the pores were overcome by conducting the nZVI/PAA/PVDF membranes in the cross-flow system, reaching 40% of BPA removal after 3 h of permeation.
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Li B, Chen X, Li K, Zhang C, He Y, Du R, Wang J, Chen L. Coupling membrane and Fe–Pd bimetallic nanoparticles for trichloroethene removing from water. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.06.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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17
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Chen X, Huang G, An C, Feng R, Wu Y, Huang C. Plasma-induced PAA-ZnO coated PVDF membrane for oily wastewater treatment: Preparation, optimization, and characterization through Taguchi OA design and synchrotron-based X-ray analysis. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.03.091] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Wi H, Kim H, Oh D, Bae S, Hwang Y. Surface modification of poly(vinyl alcohol) sponge by acrylic acid to immobilize Prussian blue for selective adsorption of aqueous cesium. CHEMOSPHERE 2019; 226:173-182. [PMID: 30927669 DOI: 10.1016/j.chemosphere.2019.03.101] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 03/05/2019] [Accepted: 03/14/2019] [Indexed: 06/09/2023]
Abstract
Prussian blue (PB) is known to be an effective cesium adsorbent, but the direct application of PB is limited by the difficulty of its recovery from solution. In this study, PB was immobilized on a porous support media, poly(vinyl alcohol) (PVA) sponge, for use as a selective material for cesium adsorption. The commercially available PVA sponge was functionalized by the addition of poly(acrylic acid) (PAA) (i.e., PAA-PVA) to enhance the PB immobilization, which increased both PB loading and binding strength. The AA functionalization changed the major functional groups from hydroxyl to carboxylic, as confirmed by Fourier-transform infrared spectroscopy. PB was further synthesized in the PAA-PVA using layer-by-layer (LBL) assembly, which contributed to more stable PB formation, and reduced detachment of PB during washing. The prepared adsorbent, PAA-L@PVA-PB, was tested for cesium adsorption capability. Cesium adsorption was equilibrated within three hours, and the maximum cesium adsorption capacity was 4.082 mg/g, which was 5.7 times higher than Pure-L@PVA-PB. The observed decrease in solution pH during cesium adsorption inhibited overall cesium uptake, however, this was minimized by buffering. The prepared PAA-L@PVA-PB was used as a column filling material and its potential use as a countermeasure for removing radioactive cesium from a contaminated water stream was demonstrated.
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Affiliation(s)
- Hyobin Wi
- Department of Environmental Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Republic of Korea
| | - Hyowon Kim
- Department of Environmental Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Republic of Korea
| | - Daemin Oh
- Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do, 10223, Republic of Korea
| | - Sungjun Bae
- Department of Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea
| | - Yuhoon Hwang
- Department of Environmental Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, Republic of Korea.
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Kim H, Wi H, Kang S, Yoon S, Bae S, Hwang Y. Prussian blue immobilized cellulosic filter for the removal of aqueous cesium. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 670:779-788. [PMID: 30921711 DOI: 10.1016/j.scitotenv.2019.03.234] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 02/26/2019] [Accepted: 03/15/2019] [Indexed: 06/09/2023]
Abstract
Cesium is a typical radioisotope that has a long half-life and is dangerous and can be emitted in the event of a nuclear accident. Prussian blue (PB), which is known to effectively adsorb cesium, is difficult to separate when it is dissolved in an aqueous system. In this study, PB was immobilized on a filter type support media, cellulose filter (CF), for use as a selective material for cesium adsorption. The commercially available CF was functionalized by the addition of acrylic acid (AA) (i.e., CF-AA) to enhance the PB immobilization, which increased both PB loading and binding strength. The AA functionalization changed the major functional groups from hydroxyl to carboxylic, as confirmed by Fourier-transform infrared spectroscopy. As a result of the surface modification, the PB immobilization increased 1.5 times and reduced detachment of PB during washing. The prepared adsorbent, CF-AA-PB, was tested for its cesium adsorption capability. Cesium adsorption equilibrated within 3 h, and the maximum cesium adsorption capacity was 16.66 mg/g. The observed decrease in the solution pH during cesium adsorption inhibited the overall cesium uptake; however, this was minimized by buffering. The prepared CF-AA-PB was used as a filter material and its potential use as a countermeasure for removing radioactive cesium from a contaminated water stream was demonstrated.
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Affiliation(s)
- Hyowon Kim
- Department of Environmental Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of Korea
| | - Hyobin Wi
- Department of Materials and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Sungwon Kang
- Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Republic of Korea
| | - Sunho Yoon
- Department of Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Sungjun Bae
- Department of Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Yuhoon Hwang
- Department of Environmental Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of Korea.
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Liu P, Wang X, Ma J, Liu H, Ning P. Highly efficient immobilization of NZVI onto bio-inspired reagents functionalized polyacrylonitrile membrane for Cr(VI) reduction. CHEMOSPHERE 2019; 220:1003-1013. [PMID: 33395787 DOI: 10.1016/j.chemosphere.2018.12.163] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 12/06/2018] [Accepted: 12/22/2018] [Indexed: 06/12/2023]
Abstract
To provide superior substrates and determine the specific species of immobilized nano zero-valent iron (NZVI) system, polyacrylonitrile (PAN) membrane was functionalized by bio-inspired polydopamine (PDA) and poly(l-DOPA) (PDOPA) for efficient immobilization of NZVI. The synthesized composites were denoted as PAN/PDA-NZVI (PPN) and PAN/PDOPA-NZVI (PON), respectively. Analyses of XRD, SEM/EDS and XPS show that the aggregation and release of iron nanoparticles had been successfully controlled by improving membrane hydrophilcity and iron-chelating capacity via the graft of functionalized groups (i.e. OH and COOH) of PDA and PDOPA on PAN membrane. Both PPN and PON composites exhibited superior reactivity for Cr(VI) removal (Cr(VI) removal efficiency and reaction rate were 2.21-2.22 and 9.90-10.14 times higher than that of bare NZVI, respectively). The stability and recyclability of PPN and PON composites could be maintained over repeated cycles. Further analyses indicate that PON is more capable for Cr(VI) elimination than PPN due to the proprietary carboxyl of l-DOPA. With the addition of 1,10-phenanthroline, membrane-chelated Fe(II) was determined to be the major species in Cr(VI) removal system, accounting for 56.9% and 53.8% with regard to PPN and PON composites, and Fe0 was responsible for the reduction of residual Cr(VI). Analyse of reacted composites revealed that Cr(VI) was completely converted into Cr(III), followed by formation of dominant Cr(III)/Fe(III) (oxy)hydroxides and partial desorption from NZVI reactive sites. This study suggested that both synthesized PPN and PON composites have potentials for Cr(VI)-contaminated wastewater treatment.
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Affiliation(s)
- Peng Liu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China
| | - Xiangyu Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
| | - Jun Ma
- State Key Laboratory of Urban Water Resources and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Huiling Liu
- State Key Laboratory of Urban Water Resources and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
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21
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Vlotman D, Ngila J, Ndlovu T, Doyle B, Carleschi E, Malinga S. Hyperbranched polymer membrane for catalytic degradation of polychlorinated biphenyl-153 (PCB-153) in water. REACT FUNCT POLYM 2019. [DOI: 10.1016/j.reactfunctpolym.2018.12.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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22
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Ma Y, Wang H, Guo M. Stainless Steel Wire Mesh Supported Molecularly Imprinted Composite Membranes for Selective Separation of Ebracteolata Compound B from Euphorbia fischeriana. Molecules 2019; 24:E565. [PMID: 30720731 PMCID: PMC6384690 DOI: 10.3390/molecules24030565] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/18/2019] [Accepted: 01/31/2019] [Indexed: 02/07/2023] Open
Abstract
Stainless steel wire mesh supported molecularly imprinted composite membranes for selective separation of Ebracteolata Compound B (ECB) were prepared based on surface polymerization using ECB separated from Euphorbia fischeriana as a template, acrylamide as a functional monomer, ethylene glycol dimethacrylate as a cross-linker, azodiisobutyronitrile as an initiator, and stainless steel wire mesh as support. Structure and purity of ECB were characterized by nuclear magenetic resonance (¹H-NMR, 13C-NMR) and ultra high performance liquid chromatography (UHPLC). The molecularly imprinted composite membranes were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). The membrane adsorbed on the ECB reached equilibrium about 30 min later, with a maximum adsorption amount of 3.39 μmol/cm². Adsorption behavior between ECB and the molecularly imprinted composite membranes followed pseudo-second-order kinetics equation and Freundlich isotherm model. The molecularly imprinted composite membranes that could selectively identify and transport ECB in similar structures have a permeation rate of 38.71% to ECB. The ECB content in the permeation solution derived from the extract of Euphorbia fischeriana through the imprinted membrane was 87%. Overall, the obtained results demonstrated that an efficient approach with the molecularly imprinted composite membranes for selective separation of ECB from Euphorbia fischeriana.
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Affiliation(s)
- Yukun Ma
- College of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China.
| | - Haijun Wang
- College of Pharmacy, Qiqihar Medical University, Qiqihar 161006, China.
| | - Mengyan Guo
- Department of National Immunization Program, Qiqihar Center for Disease Control and Prevention, Qiqihar 161006, China.
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23
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Nazari R, Rajić L, Ciblak A, Hernández S, Mousa IE, Zhou W, Bhattacharyya D, Alshawabkeh AN. Immobilized palladium-catalyzed electro-Fenton's degradation of chlorobenzene in groundwater. CHEMOSPHERE 2019; 216:556-563. [PMID: 30390586 PMCID: PMC6293191 DOI: 10.1016/j.chemosphere.2018.10.143] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 10/17/2018] [Accepted: 10/19/2018] [Indexed: 05/23/2023]
Abstract
This study investigates the effect of palladium (Pd) form on the electrochemical degradation of chlorobenzene in groundwater by palladium-catalyzed electro-Fenton (EF) reaction. In batch and flow-through column reactors, EF was initiated via in-situ electrochemical formation of hydrogen peroxide (H2O2) supported by Pd on alumina powder or by palladized polyacrylic acid (PAA) in a polyvinylidene fluoride (PVDF) membrane (Pd-PVDF/PAA). In a mixed batch reactor containing 10 mg L-1 Fe2+, 2 g L-1 of catalyst in powder form (1% Pd, 20 mg L-1 of Pd) and an initial pH of 3, chlorobenzene was degraded under 120 mA current following a first-order decay rate showing 96% removal within 60 min. Under the same conditions, a rotating Pd-PVDF/PAA disk produced 88% of chlorobenzene degradation. In the column experiment with automatic pH adjustment, 71% of chlorobenzene was removed within 120 min with 10 mg L-1 Fe2+, and 2 g L-1 catalyst in pellet form (0.5% Pd, 10 mg L-1 of Pd) under 60 mA. The EF reaction can be achieved under flow, without external pH adjustment and H2O2 addition, and can be applied for in-situ groundwater treatment. Furthermore, the rotating PVDF-PAA membrane with immobilized Pd-catalyst showed an effective and low maintenance option for employing Pd catalyst for water treatment.
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Affiliation(s)
- Roya Nazari
- Department of Civil and Environmental Engineering, Northeastern University, 400 Snell Engineering, 360 Huntington Avenue, Boston, MA, 02115, USA
| | - Ljiljana Rajić
- Pioneer Valley Coral and Natural Science Institute, 1 Mill Valley Road, Hadley, MA, 01035, USA
| | - Ali Ciblak
- Geosyntec Consultants, 1255 Roberts Boulevard, suite 200, Kennesaw, GA, 30144, USA
| | - Sebastián Hernández
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506, USA
| | - Ibrahim E Mousa
- Department of Environmental Biotechnology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Menoufia, 22857, Egypt
| | - Wei Zhou
- Department of Civil and Environmental Engineering, Northeastern University, 400 Snell Engineering, 360 Huntington Avenue, Boston, MA, 02115, USA; Department of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, PR China
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506, USA
| | - Akram N Alshawabkeh
- Department of Civil and Environmental Engineering, Northeastern University, 400 Snell Engineering, 360 Huntington Avenue, Boston, MA, 02115, USA.
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Islam MS, Hernández S, Wan H, Ormsbee L, Bhattacharyya D. Role of membrane pore polymerization conditions for pH responsive behavior, catalytic metal nanoparticle synthesis, and PCB degradation. J Memb Sci 2018; 555:348-361. [PMID: 30718939 PMCID: PMC6358284 DOI: 10.1016/j.memsci.2018.03.060] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This article describes the effects of changing monomer and cross-linker concentrations on the mass gain, water permeability, Pd-Fe nanoparticle (NP) loading, and the rate of degradation of 3,3',4,4',5-pentachlorobiphenyl (PCB 126) of pore functionalized polyvinylidene fluoride (PVDF) membranes. In this study, monomer (acrylic acid (AA)) and cross-linker (N, N'- methylene-bis (acrylamide)) concentrations were varied from 10 to 20 wt% of polymer solution and 0.5-2 mol% of monomer concentration, respectively. Results showed that responsive behavior of membrane could be tuned in terms of water permeability over a range of 270-1 L m-2 h-1 bar-1, which is a function of water pH. The NP size on the membrane surface was found in the range of 16-23 nm. With increasing cross-linker density the percentage of smaller NPs (< 10 nm) increases due to smaller mesh size formation during in-situ polymerization of membrane. NP loading was found to vary from 0.21 to 0.94 mg per cm2 of membrane area depending on the variation of available carboxyl groups in membrane pore domain. The NPs functionalized membranes were then tested for use as a platform for the degradation of PCB 126. The observed batch reaction rate (Kobs) for PCB 126 degradation for per mg of catalyst loading was found 0.08-0.1 h-1. Degradation study in convective flow mode shows 98.6% PCB 126 is degraded at a residence time of 46.2 s. The corresponding surface area normalized reaction rate (K sa ) is found about two times higher than K sa of batch degradation; suggesting elimination of the effect of diffusion resistance for degradation of PCB 126 in convective flow mode operation. These Pd-Fe-PAA-PVDF membranes and nanoparticles are characterized by TGA, contact angle measurement, surface zeta potential, XRD, SEM, XPS, FIB, TEM and other techniques reveal the details about the membrane surface, pores and nanoparticles size, shape and size-distribution. Statistical analysis based on experimental results allows us to depict responsive behavior of functionalized membrane. In our best knowledge this paper first time reports detail study on responsive behavior of pore functionalized membrane in terms of permeability, NPs size, metal loading and its effect on PCB 126 degradation in a quantified approach.
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Affiliation(s)
- Md. Saiful Islam
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower Building, Lexington, KY 40506, USA
| | - Sebastián Hernández
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower Building, Lexington, KY 40506, USA
| | - Hongyi Wan
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower Building, Lexington, KY 40506, USA
| | - Lindell Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower Building, Lexington, KY 40506, USA
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25
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Detisch MJ, Balk TJ, Bhattacharyya D. Synthesis of Catalytic Nanoporous Metallic Thin Films on Polymer Membranes. Ind Eng Chem Res 2018; 57:4420-4429. [PMID: 30718940 DOI: 10.1021/acs.iecr.8b00053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Composite membranes were produced with a metallic thin film forming the upper layer of the composite on a porous polymer support. Commercially available membranes were used as supports with both micron and nanometer scale pores. Alloy films of ~110 nm thickness were deposited via magnetron sputtering to produce the top layer of the composite. Dealloying the film with sulfuric acid allowed the creation of a nanoporous film structure with a ligament size of 7.7 ± 2.5 nm. Resulting composite membranes were permeable to water at all stages of production, and a UF PSf membrane with 90 nm of nanoporous Fe/Pd on top showed a flux of 183 LHM/bar. The films were evaluated for dechlorination of toxic polychlorinated biphenyls from water. At a loading of 6.6 mg/L of Pd attached to 13.2 cm2 support in a 2.5 ppm PCB-1 solution with 1.5 ppm dissolved H2, over 90% of PCB-1 was removed from solution in 30 minutes, which produced the expected product biphenyl from the dechlorination reaction.
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Affiliation(s)
- Michael J Detisch
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - T John Balk
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
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26
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Kaur R, Chhibber M, Mahata P, Mittal SK. Induction of Catalytic Activity in ZnO Loaded Cobalt Based MOF for the Reduction of Nitroarenes. ChemistrySelect 2018. [DOI: 10.1002/slct.201702703] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Rupinder Kaur
- School of Chemistry & BiochemistryThapar University Patiala, Punjab India
| | - Manmohan Chhibber
- School of Chemistry & BiochemistryThapar University Patiala, Punjab India
| | - Partha Mahata
- Department of ChemistryJadavpur University Kolkata, West Bengal India
| | - Susheel K. Mittal
- School of Chemistry & BiochemistryThapar University Patiala, Punjab India
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27
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Sivasankar V, Nkonde MA, Govender P, Omine K, Kuvarega AT, Prabhakaran M, Msagati TA. Dendrimer supported Fe/Ni bimetallic composites immobilized in polyethersulfone membranes for effective degradation of arginine containing microcystins. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2017.11.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Hernández S, Porter C, Zhang X, Wei Y, Bhattacharyya D. Layer-by-layer Assembled Membranes with Immobilized Porins. RSC Adv 2017; 7:56123-56136. [PMID: 29391943 PMCID: PMC5788187 DOI: 10.1039/c7ra08737c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
With the synthesis and functionalization of membranes for selective separations, reactivity, and stimuli responsive behavior arises new and advanced opportunities. The integration of bio-based channels is one of these advancements in membrane technologies. By a layer-by-layer (LbL) assembly of polyelectrolytes, outer membrane protein F trimers (OmpF) or "porins" from Escherichia coli with a central pore of ~2 nm diameter at its opening and ~0.7 × 1.1 nm at its constricted region are immobilized within the pores of poly(vinylidene fluoride) microfiltration membranes, as opposed to traditional ruptured lipid bilayer or vesicles processes. These OmpF-membranes demonstrate selective rejections of non-charged organics over ionic solutes, allowing the passage of salts up to 2 times higher than traditional nanofiltration membranes starting with rejections of 84% for 0.4-1.0 kDa organics. The presence of charged groups in OmpF membranes also leads to pH-dependent salt rejection through Donnan exclusion. These OmpF-membranes also show exceptional durability and stability, delivering consistent and constant permeability and recovery for over 160 h of operation. Characterization of solutions containing OmpF, and membranes were conducted during each stage of the process, including detection by fluorescence labelling (FITC), zeta potential, pH responsiveness, flux changes, and rejections of organic-inorganic solutions.
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Affiliation(s)
- Sebastián Hernández
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY
| | - Cassandra Porter
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY
| | - Xinyi Zhang
- Department of Chemistry, University of Kentucky, Lexington, KY
| | - Yinan Wei
- Department of Chemistry, University of Kentucky, Lexington, KY
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY
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29
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Xu L, Ma S, Chen X, Zhao C, Zhao Y, Chen L. A novel poly(vinylidene fluoride) composite membrane for catalysis and separation. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24542] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Liangliang Xu
- Department of Polymer Science, School of Materials Science and Engineering; Tianjin Polytechnic University; Tianjin 300387 People's Republic of China
| | - Shengkui Ma
- Department of Polymer Science, School of Materials Science and Engineering; Tianjin Polytechnic University; Tianjin 300387 People's Republic of China
- State Key Laboratory of Separation Membrane and Membrane Process; Tianjin Polytechnic University; Tianjin 300387 People's Republic of China
| | - Xi Chen
- Department of Polymer Science, School of Materials Science and Engineering; Tianjin Polytechnic University; Tianjin 300387 People's Republic of China
- State Key Laboratory of Separation Membrane and Membrane Process; Tianjin Polytechnic University; Tianjin 300387 People's Republic of China
| | - Chu Zhao
- Department of Polymer Science, School of Materials Science and Engineering; Tianjin Polytechnic University; Tianjin 300387 People's Republic of China
- State Key Laboratory of Separation Membrane and Membrane Process; Tianjin Polytechnic University; Tianjin 300387 People's Republic of China
| | - Yiping Zhao
- Department of Polymer Science, School of Materials Science and Engineering; Tianjin Polytechnic University; Tianjin 300387 People's Republic of China
- State Key Laboratory of Separation Membrane and Membrane Process; Tianjin Polytechnic University; Tianjin 300387 People's Republic of China
| | - Li Chen
- Department of Polymer Science, School of Materials Science and Engineering; Tianjin Polytechnic University; Tianjin 300387 People's Republic of China
- State Key Laboratory of Separation Membrane and Membrane Process; Tianjin Polytechnic University; Tianjin 300387 People's Republic of China
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30
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Wang J, Guo H, Yang Z, Mei Y, Tang CY. Gravity-driven catalytic nanofibrous membranes prepared using a green template. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.12.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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31
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Progress and perspectives for synthesis of sustainable antifouling composite membranes containing in situ generated nanoparticles. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.11.040] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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32
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Hernández S, Lei S, Rong W, Ormsbee L, Bhattacharyya D. Functionalization of flat sheet and hollow fiber microfiltration membranes for water applications. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2016; 4:907-918. [PMID: 29392097 PMCID: PMC5790112 DOI: 10.1021/acssuschemeng.5b01005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Functionalized membranes containing nanoparticles provide a novel platform for organic pollutant degradation reactions and for selective removal of contaminants without the drawback of potential nanoparticle loss to the environment. These eco-friendly and sustainable technology approaches allow various water treatment applications through enhanced water transport through the membrane pores. This paper presents "green" techniques to create nanocomposite materials based on sponge-like membranes for water remediation applications involving chlorinated organic compounds. First, hydrophobic hollow fiber microfiltration membranes (HF) of polyvinylidene fluoride were hydrophilized using a water-based green chemistry process with polyvinylpyrrolidone and persulfate. HF and flat sheet membrane pores were then functionalized with poly(acrylic acid) and synthesized Fe/Pd nanoparticles. Surface modifications were determined by contact angle, surface free energy and infrared spectroscopy. The synthesized nanoparticles were characterized by electronic microscopy, X-ray spectrometry and image analysis. Nanoparticle sizes of 193 and 301 nm were obtained for each of the membranes. Depending on the concentration of the dopant (Pd) in the membrane, catalytic activity (established by trichloroethylene (TCE) reduction), was enhanced up to tenfold compared to other reported results. Chloride produced in reduction was close to the stoichiometric 3/1 (Cl-/TCE), indicating complete absence of reaction intermediates.
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Affiliation(s)
- Sebastián Hernández
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Shi Lei
- Singapore Membrane Technology Centre, Nanyang Technological University, 639798, Singapore
| | - Wang Rong
- Singapore Membrane Technology Centre, Nanyang Technological University, 639798, Singapore
| | - Lindell Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, KY 40506
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
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33
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Development of PVDF Membrane Nanocomposites via Various Functionalization Approaches for Environmental Applications. Polymers (Basel) 2016; 8:polym8020032. [PMID: 30979126 PMCID: PMC6432535 DOI: 10.3390/polym8020032] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 01/21/2016] [Accepted: 01/22/2016] [Indexed: 11/26/2022] Open
Abstract
Membranes are finding wide applications in various fields spanning biological, water, and energy areas. Synthesis of membranes to provide tunable flux, metal sorption, and catalysis has been done through pore functionalization of microfiltration (MF) type membranes with responsive behavior. This methodology provides an opportunity to improve synthetic membrane performance via polymer fabrication and surface modification. By optimizing the polymer coagulation conditions in phase inversion fabrication, spongy polyvinylidene fluoride (PVDF) membranes with high porosity and large internal pore volume were created in lab and full scale. This robust membrane shows a promising mechanical strength as well as high capacity for loading of adsorptive and catalytic materials. By applying surface modification techniques, synthetic membranes with different functionality (carboxyl, amine, and nanoparticle-based) were obtained. These functionalities provide an opportunity to fine-tune the membrane surface properties such as charge and reactivity. The incorporation of stimuli-responsive acrylic polymers (polyacrylic acid or sodium polyacrylate) in membrane pores also results in tunable pore size and ion-exchange capacity. This provides the added benefits of adjustable membrane permeability and metal capture efficiency. The equilibrium and dynamic binding capacity of these functionalized spongy membranes were studied via calcium ion-exchange. Iron/palladium catalytic nanoparticles were immobilized in the polymer matrix in order to perform the challenging degradation of the environmental pollutant trichloroethylene (TCE).
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34
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Wang Z, Chen X, Li K, Bi S, Wu C, Chen L. Preparation and catalytic property of PVDF composite membrane with polymeric spheres decorated by Pd nanoparticles in membrane pores. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.08.041] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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35
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Scorrano S, Mergola L, Di Bello MP, Lazzoi MR, Vasapollo G, Del Sole R. Molecularly Imprinted Composite Membranes for Selective Detection of 2-Deoxyadenosine in Urine Samples. Int J Mol Sci 2015; 16:13746-59. [PMID: 26086824 PMCID: PMC4490521 DOI: 10.3390/ijms160613746] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 06/05/2015] [Accepted: 06/11/2015] [Indexed: 11/16/2022] Open
Abstract
An important challenge for scientific research is the production of artificial systems able to mimic the recognition mechanisms occurring at the molecular level in living systems. A valid contribution in this direction resulted from the development of molecular imprinting. In this work, a novel molecularly imprinted polymer composite membrane (MIM) was synthesized and employed for the selective detection in urine samples of 2-deoxyadenosine (2-dA), an important tumoral marker. By thermal polymerization, the 2-dA-MIM was cross-linked on the surface of a polyvinylidene-difluoride (PVDF) membrane. By characterization techniques, the linking of the imprinted polymer on the surface of the membrane was found. Batch-wise guest binding experiments confirmed the absorption capacity of the synthesized membrane towards the template molecule. Subsequently, a time-course of 2-dA retention on membrane was performed and the best minimum time (30 min) to bind the molecule was established. HPLC analysis was also performed to carry out a rapid detection of target molecule in urine sample with a recovery capacity of 85%. The experiments indicated that the MIM was highly selective and can be used for revealing the presence of 2-dA in urine samples.
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Affiliation(s)
- Sonia Scorrano
- Dipartimento di Ingegneria dell'Innovazione, Università del Salento, via per Arnesano Km 1, Lecce 73100, Italy.
| | - Lucia Mergola
- Dipartimento di Ingegneria dell'Innovazione, Università del Salento, via per Arnesano Km 1, Lecce 73100, Italy.
| | - Maria Pia Di Bello
- Dipartimento di Ingegneria dell'Innovazione, Università del Salento, via per Arnesano Km 1, Lecce 73100, Italy.
| | - Maria Rosaria Lazzoi
- Dipartimento di Ingegneria dell'Innovazione, Università del Salento, via per Arnesano Km 1, Lecce 73100, Italy.
| | - Giuseppe Vasapollo
- Dipartimento di Ingegneria dell'Innovazione, Università del Salento, via per Arnesano Km 1, Lecce 73100, Italy.
| | - Roberta Del Sole
- Dipartimento di Ingegneria dell'Innovazione, Università del Salento, via per Arnesano Km 1, Lecce 73100, Italy.
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36
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Saranya R, Arthanareeswaran G, Ismail AF, Dionysiou DD, Paul D. Zero-valent iron impregnated cellulose acetate mixed matrix membranes for the treatment of textile industry effluent. RSC Adv 2015. [DOI: 10.1039/c5ra06948c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel green synthesized zero valent iron (ZVI) nanoparticles of distinct mass fractions of 0.5, 1.5 and 2.5 wt% are blended with cellulose acetate (CA) to prepare CA/ZVI mixed matrix membranes (MMMs).
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Affiliation(s)
- R. Saranya
- 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
| | - A. F. Ismail
- Advanced Membrane Technology Research Centre (AMTEC)
- Universiti Teknologi Malaysia
- Skudai
- Malaysia
| | - Dionysios D. Dionysiou
- Environmental Engineering and Science Program
- Department of Biomedical, Chemical and Environmental Engineering (DBCEE)
- University of Cincinnati
- Cincinnati
- USA
| | - Diby Paul
- Department of Environmental Engineering
- Konkuk University
- Seoul
- Republic of Korea
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37
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Sikhwivhilu K, Moutloali RM. Functionalized PVDF Membrane-immobilized Fe/Ni Bimetallic Nanoparticles for Catalytic Degradation of Methyl Orange Dye: A Comparative Study. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.matpr.2015.08.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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38
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Xiao L, Davenport DM, Ormsbee L, Bhattacharyya D. Polymerization and Functionalization of Membrane Pores for Water Related Applications. Ind Eng Chem Res 2014; 54:4174-4182. [PMID: 26074669 PMCID: PMC4461045 DOI: 10.1021/ie504149t] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 12/15/2014] [Accepted: 12/15/2014] [Indexed: 11/28/2022]
Abstract
Poly(vinylidene fluoride) (PVDF)
was modified by chemical treatments
in order to create active double bonds to obtain covalent grafting
of poly(acrylic acid) (PAA) on membrane. The attenuated total reflectance
Fourier transform infrared (ATR-FTIR) spectrum confirms the formation
of conjugated C=C double bonds with surface dehydrofluorination.
The membrane morphology was studied by scanning electron microscopy
(SEM). The surface composition was characterized by X-ray photoelectron
spectroscopy (XPS). The thermal stability of the dehydrofluorinated
membrane (Def-PVDF) and functionalized membranes were investigated
by differential scanning calorimetry (DSC) analysis. The influence
of covalently attached PAA on Def-PVDF membrane has been investigated
to determine its effect on the transport of water and charged solute.
Variations in the solution pH show an effect on both permeability
and solute retention in a reversible fashion. Metal nanoparticles
were also immobilized in the membrane for the degradation of toxic
chlorinated organics from water. In addition, PVDF membranes with
an asymmetric and sponge-like morphology were developed by immersion-precipitation
phase-inversion methods in both lab-scale and large-scale. The new
type of spongy PVDF membrane shows high surface area with higher yield
of PAA functionalization. The ion-capacity with Ca2+ ions
was also investigated.
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Affiliation(s)
- Li Xiao
- Department of Chemical and Materials Engineering and Department of Civil Engineering, University of Kentucky , Lexington, Kentucky 40506, United States
| | - Douglas M Davenport
- Department of Chemical and Materials Engineering and Department of Civil Engineering, University of Kentucky , Lexington, Kentucky 40506, United States
| | - Lindell Ormsbee
- Department of Chemical and Materials Engineering and Department of Civil Engineering, University of Kentucky , Lexington, Kentucky 40506, United States
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering and Department of Civil Engineering, University of Kentucky , Lexington, Kentucky 40506, United States
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39
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Synthesis and characterization of ceramic/carbon nanotubes composite adsorptive membrane for copper ion removal from water. KOREAN J CHEM ENG 2014. [DOI: 10.1007/s11814-014-0210-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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40
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Temperature- and pH-sensitive membrane formed from blends of poly(vinylidene fluoride)-graft-poly(N-isopropylacrylamide) and poly(acrylic acid) microgels. REACT FUNCT POLYM 2014. [DOI: 10.1016/j.reactfunctpolym.2014.08.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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41
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Chen X, He Y, Shi C, Fu W, Bi S, Wang Z, Chen L. Temperature- and pH-responsive membranes based on poly (vinylidene fluoride) functionalized with microgels. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2014.07.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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42
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Liang HQ, Wu QY, Wan LS, Huang XJ, Xu ZK. Thermally induced phase separation followed by in situ sol–gel process: A novel method for PVDF/SiO2 hybrid membranes. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2014.03.068] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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43
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Effects of PMMA/anisole hybrid coatings on discoloration performance of nano zerovalent iron toward organic dyes. J Taiwan Inst Chem Eng 2014. [DOI: 10.1016/j.jtice.2013.08.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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44
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Xiao L, Isner A, Waldrop K, Saad A, Takigawa D, Bhattacharyya D. Development of Bench and Full-Scale Temperature and pH Responsive Functionalized PVDF Membranes with Tunable Properties. J Memb Sci 2014; 457:39-49. [PMID: 24944434 PMCID: PMC4058347 DOI: 10.1016/j.memsci.2014.01.033] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Temperature and pH responsive polymers (poly(N-isopropylacrylamide) (PNIPAAm), and polyacrylic acid, PAA) were synthesized in one common macrofiltration PVDF membrane platform by pore-filling method. The microstructure and morphology of the PNIPAAm-PVDF, and PNIPAAm-FPAA-PVDF membranes were studied by attenuated total reflectance Fourier transform infrared (ATR-FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The membrane pore size was controlled by the swelling and shrinking of the PNIPAAm at the temperature around lower critical solution temperature (LCST). The composite membrane demonstrated a rapid and reversible swelling and deswelling change within a small temperature range. The controllable flux makes it possible to utilize this temperature responsive membrane as a valve to regulate filtration properties by temperature change. Dextran solution (Mw=2,000,000g/mol, 26 nm diameter) was used to evaluate the separation performance of the temperature responsive membranes. The ranges of dextran rejection are from 4% to 95% depending on the temperature, monomer amount and pressure. The full-scale membrane was also developed to confirm the feasibility of our bench-scale experimental results. The full-scale membrane also exhibited both temperature and pH responsivity. This system was also used for controlled nanoparticles synthesis and for dechlorination reaction.
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Affiliation(s)
- Li Xiao
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Austin Isner
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Krysta Waldrop
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Anthony Saad
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | | | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
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45
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Emin C, Remigy JC, Lahitte JF. Influence of UV grafting conditions and gel formation on the loading and stabilization of palladium nanoparticles in photografted polyethersulfone membrane for catalytic reactions. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.12.049] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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46
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Hernández S, Papp JK, Bhattacharyya D. Iron-Based Redox Polymerization of Acrylic Acid for Direct Synthesis of Hydrogel/Membranes, and Metal Nanoparticles for Water Treatment. Ind Eng Chem Res 2014; 53:1130-1142. [PMID: 24954975 PMCID: PMC4061718 DOI: 10.1021/ie403353g] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Functionalized polymer materials with ion exchange groups and integration of nano-structured materials is an emerging area for catalytic and water pollution control applications. The polymerization of materials such as acrylic acid often requires persulfate initiator and a high temperature start. However, is generally known that metal ions accelerate such polymerizations starting from room temperature. If the metal is properly selected, it can be used in environmental applications adding two advantages simultaneously. This paper deals with this by polymerizing acrylic acid using iron as accelerant and its subsequent use for nanoparticle synthesis in hydrogel and PVDF membranes. Characterizations of hydrogel, membranes and nanoparticles were carried out with different techniques. Nanoparticles sizes of 30-60 nm were synthesized. Permeability and swelling measurements demonstrate an inverse relationship between hydrogel mesh size (6.30 to 8.34 nm) and membrane pores (222 to 110 nm). Quantitative reduction of trichloroethylene/chloride generation by Fe/Pd nanoparticles in hydrogel/membrane platforms was also performed.
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Affiliation(s)
- Sebastián Hernández
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506-0046
| | - Joseph K. Papp
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506-0046
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506-0046
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47
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Yang J, Wang X, Zhu M, Liu H, Ma J. Investigation of PAA/PVDF-NZVI hybrids for metronidazole removal: synthesis, characterization, and reactivity characteristics. JOURNAL OF HAZARDOUS MATERIALS 2014; 264:269-277. [PMID: 24316246 DOI: 10.1016/j.jhazmat.2013.11.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 11/14/2013] [Accepted: 11/17/2013] [Indexed: 06/02/2023]
Abstract
For the first time, the removal process of metronidazole (MNZ) from aqueous solutions over nano zerovalent iron (NZVI) encapsulated within poly(acrylic acid) (PAA)/poly(vinylidene fluoride) (PVDF) membranes was reported. The resultant composite (PPN) demonstrated high reactivity, excellent stability and reusability over the reaction course. Such excellent performance might be attributed to the presence of the charged carboxyl groups in PVDF membrane support, which could enhance NZVI dispersion and improve its longevity. Results showed that a lower initial concentration and higher reaction temperature facilitated the removal of MNZ by PPN, and that the acidic and neutral conditions generally exhibited more favorable effect on MNZ removal than the alkaline ones. Kinetics of the MNZ removal by PPN was found to follow a two-parameter pseudo-first-order decay model well, and the activation energy of the MNZ degradation by PPN was determined to be 30.49kJ/mol. The presence of chloride ions slightly enhanced the reactivity of PPN with MNZ, whereas sulfate ions inhibited its reactivity. In addition, MNZ degradation pathways by PPN were proposed based on the identified intermediates. This study suggests that PPN composite possessing excellent performance may be a promising functional material to pretreat antibiotic wastewaters.
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Affiliation(s)
- Jiacheng Yang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Xiangyu Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China.
| | - Minping Zhu
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, PR China
| | - Huiling Liu
- School of Municipal and Environmental Engineering, State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Jun Ma
- School of Municipal and Environmental Engineering, State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150090, PR China
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48
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Gui M, Ormsbee LE, Bhattacharyya D. Reactive Functionalized Membranes for Polychlorinated Biphenyl Degradation. Ind Eng Chem Res 2013; 52:10430-10440. [PMID: 24954974 PMCID: PMC4061716 DOI: 10.1021/ie400507c] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Membranes have been widely used in water remediation (e.g. desalination and heavy metal removal) because of the ability to control membrane pore size and surface charge. The incorporation of nanomaterials into the membranes provides added benefits through increased reactivity with different functionality. In this study, we report the dechlorination of 2-chlorobiphenyl in the aqueous phase by a reactive membrane system. Fe/Pd bimetallic nanoparticles (NPs) were synthesized (in-situ) within polyacrylic acid (PAA) functionalized polyvinylidene fluoride (PVDF) membranes for degradation of polychlorinated biphenyls (PCBs). Biphenyl formed in the reduction was further oxidized into hydroxylated biphenyls and benzoic acid by an iron-catalyzed hydroxyl radical (OH•) reaction. The formation of magnetite on Fe surface was observed. This combined pathway (reductive/oxidative) could reduce the toxicity of PCBs effectively while eliminating the formation of chlorinated degradation byproducts. The successful manufacturing of full-scale functionalized membranes demonstrates the possibility of applying reactive membranes in practical water treatment.
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Affiliation(s)
- Minghui Gui
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506
| | - Lindell E. Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, KY 40506
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506
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49
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He Y, Chen X, Bi S, Shi C, Chen L, Li L. Structure and pH-sensitive properties of poly (vinylidene fluoride) membrane changed by blending poly (acrylic acid) microgels. POLYM ADVAN TECHNOL 2013. [DOI: 10.1002/pat.3167] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yang He
- School of Materials Science and Engineering; Tianjin Polytechnic University; Tianjin 300387 PR China
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes; Tianjin Polytechnic University; Tianjin 300387 PR China
| | - Xi Chen
- School of Materials Science and Engineering; Tianjin Polytechnic University; Tianjin 300387 PR China
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes; Tianjin Polytechnic University; Tianjin 300387 PR China
| | - Shiyin Bi
- School of Materials Science and Engineering; Tianjin Polytechnic University; Tianjin 300387 PR China
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes; Tianjin Polytechnic University; Tianjin 300387 PR China
| | - Congcong Shi
- School of Materials Science and Engineering; Tianjin Polytechnic University; Tianjin 300387 PR China
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes; Tianjin Polytechnic University; Tianjin 300387 PR China
| | - Li Chen
- School of Materials Science and Engineering; Tianjin Polytechnic University; Tianjin 300387 PR China
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes; Tianjin Polytechnic University; Tianjin 300387 PR China
| | - Liying Li
- School of Environment and Chemical Engineering; Tianjin Polytechnic University; Tianjin 300387 PR China
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50
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Multifunctional kaolinite-supported nanoscale zero-valent iron used for the adsorption and degradation of crystal violet in aqueous solution. J Colloid Interface Sci 2013; 398:59-66. [DOI: 10.1016/j.jcis.2013.02.020] [Citation(s) in RCA: 136] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 02/04/2013] [Accepted: 02/08/2013] [Indexed: 11/18/2022]
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