801
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Zhao L, Ho WW. Novel reverse osmosis membranes incorporated with a hydrophilic additive for seawater desalination. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.12.066] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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802
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Lei G, Liu C, Xie H, Song F. Separation of the hydrogen sulfide and methane mixture by the porous graphene membrane: Effect of the charges. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.03.040] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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803
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Knust KN, Hlushkou D, Tallarek U, Crooks RM. Electrochemical Desalination for a Sustainable Water Future. ChemElectroChem 2014. [DOI: 10.1002/celc.201300236] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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804
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Rhim JW, Lee B, Park HH, Seo CH. Preparation and characterization of chlorine resistant thin film composite polyamide membranes via the adsorption of various hydrophilic polymers onto membrane surfaces. Macromol Res 2014. [DOI: 10.1007/s13233-014-2051-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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805
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Free volume characterization of sulfonated styrenic pentablock copolymers using positron annihilation lifetime spectroscopy. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.11.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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806
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807
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808
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Wang J, Dlamini DS, Mishra AK, Pendergast MTM, Wong MC, Mamba BB, Freger V, Verliefde AR, Hoek EM. A critical review of transport through osmotic membranes. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.12.034] [Citation(s) in RCA: 216] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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809
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Room-temperature development of thin film composite reverse osmosis membranes from cellulose acetate with antibacterial properties. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.10.062] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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810
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Filimon A, Avram E, Stoica I. Rheological and morphological characteristics of multicomponent polysulfone/poly(vinyl alcohol) systems. POLYM INT 2014. [DOI: 10.1002/pi.4716] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anca Filimon
- ‘Petru Poni’ Institute of Macromolecular Chemistry; Physical Chemistry of Polymers Department; 41A Gr. Ghica Voda Alley 700487 Iasi Romania
| | - Ecaterina Avram
- ‘Petru Poni’ Institute of Macromolecular Chemistry; Physical Chemistry of Polymers Department; 41A Gr. Ghica Voda Alley 700487 Iasi Romania
| | - Iuliana Stoica
- ‘Petru Poni’ Institute of Macromolecular Chemistry; Physical Chemistry of Polymers Department; 41A Gr. Ghica Voda Alley 700487 Iasi Romania
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811
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Kim HJ, Choi K, Baek Y, Kim DG, Shim J, Yoon J, Lee JC. High-performance reverse osmosis CNT/polyamide nanocomposite membrane by controlled interfacial interactions. ACS APPLIED MATERIALS & INTERFACES 2014; 6:2819-2829. [PMID: 24467487 DOI: 10.1021/am405398f] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Polyamide reverse osmosis (RO) membranes with carbon nanotubes (CNTs) are prepared by interfacial polymerization using trimesoyl chloride (TMC) solutions in n-hexane and aqueous solutions of m-phenylenediamine (MPD) containing functionalized CNTs. The functionalized CNTs are prepared by the reactions of pristine CNTs with acid mixture (sulfuric acid and nitric acid of 3:1 volume ratio) by varying amounts of acid, reaction temperature, and reaction time. CNTs prepared by an optimized reaction condition are found to be well-dispersed in the polyamide layer, which is confirmed from atomic force microscopy, scanning electron microscopy, and Raman spectroscopy studies. The polyamide RO membranes containing well-dispersed CNTs exhibit larger water flux values than polyamide membrane prepared without any CNTs, although the salt rejection values of these membranes are close. Furthermore, the durability and chemical resistance against NaCl solutions of the membranes containing CNTs are found to be improved compared with those of the membrane without CNTs. The high membrane performance (high water flux and salt rejection) and the improved stability of the polyamide membranes containing CNTs are ascribed to the hydrophobic nanochannels of CNTs and well-dispersed states in the polyamide layers formed through the interactions between CNTs and polyamide in the active layers.
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Affiliation(s)
- Hee Joong Kim
- School of Chemical and Biological Engineering and Institute of Chemical Process, Seoul National University , 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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812
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Powell J, Luh J, Coronell O. Bulk chlorine uptake by polyamide active layers of thin-film composite membranes upon exposure to free chlorine-kinetics, mechanisms, and modeling. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:2741-2749. [PMID: 24506252 DOI: 10.1021/es4047632] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We studied the volume-averaged chlorine (Cl) uptake into the bulk region of the aromatic polyamide active layer of a reverse osmosis membrane upon exposure to free chlorine. Volume-averaged measurements were obtained using Rutherford backscattering spectrometry with samples prepared at a range of free chlorine concentrations, exposure times, and mixing, rinsing, and pH conditions. Our volume-averaged measurements complement previous studies that have quantified Cl uptake at the active layer surface (top ≈ 7 nm) and advance the mechanistic understanding of Cl uptake by aromatic polyamide active layers. Our results show that surface Cl uptake is representative of and underestimates volume-averaged Cl uptake under acidic conditions and alkaline conditions, respectively. Our results also support that (i) under acidic conditions, N-chlorination followed by Orton rearrangement is the dominant Cl uptake mechanism with N-chlorination as the rate-limiting step; (ii) under alkaline conditions, N-chlorination and dechlorination of N-chlorinated amide links by hydroxyl ion are the two dominant processes; and (iii) under neutral pH conditions, the rates of N-chlorination and Orton rearrangement are comparable. We propose a kinetic model that satisfactorily describes Cl uptake under acidic and alkaline conditions, with the largest discrepancies between model and experiment occurring under alkaline conditions at relatively high chlorine exposures.
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Affiliation(s)
- Joshua Powell
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States
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813
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Aiba M, Tokuyama T, Baba S, Matsumoto H, Tomioka H, Higashihara T, Ueda M. Improvement in semipermeable membrane performance of wholly aromatic polyamide through an additive processing strategy. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27113] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Motohiro Aiba
- Department of Organic and Polymeric MaterialsGraduate School of Science and Engineering, Tokyo Institute of Technology2–12‐1, O‐okayama, Meguro‐kuTokyo152‐8552 Japan
| | | | - Susumu Baba
- Department of Organic and Polymeric MaterialsGraduate School of Science and Engineering, Tokyo Institute of Technology2–12‐1, O‐okayama, Meguro‐kuTokyo152‐8552 Japan
| | - Hidetoshi Matsumoto
- Department of Organic and Polymeric MaterialsGraduate School of Science and Engineering, Tokyo Institute of Technology2–12‐1, O‐okayama, Meguro‐kuTokyo152‐8552 Japan
| | | | - Tomoya Higashihara
- Department of Polymer Science and Engineering, Faculty of EngineeringYamagata University4‐3‐16 JonanYonezawa City Yamagata992‐8510 Japan
| | - Mitsuru Ueda
- Department of Organic and Polymeric MaterialsGraduate School of Science and Engineering, Tokyo Institute of Technology2–12‐1, O‐okayama, Meguro‐kuTokyo152‐8552 Japan
- Department of Polymer Science and Engineering, Faculty of EngineeringYamagata University4‐3‐16 JonanYonezawa City Yamagata992‐8510 Japan
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814
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Sundell BJ, Lee KS, Nebipasagil A, Shaver A, Cook JR, Jang ES, Freeman BD, McGrath JE. Cross-Linking Disulfonated Poly(arylene ether sulfone) Telechelic Oligomers. 1. Synthesis, Characterization, and Membrane Preparation. Ind Eng Chem Res 2014. [DOI: 10.1021/ie404006s] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Benjamin J. Sundell
- Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Kwan-soo Lee
- Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Ali Nebipasagil
- Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Andrew Shaver
- Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Joseph R. Cook
- Department of Chemical Engineering, Center for Energy
and Environmental Resources, The University of Texas at Austin, Austin, Texas 78758, United States
| | - Eui-Soung Jang
- Department of Chemical Engineering, Center for Energy
and Environmental Resources, The University of Texas at Austin, Austin, Texas 78758, United States
| | - Benny D. Freeman
- Department of Chemical Engineering, Center for Energy
and Environmental Resources, The University of Texas at Austin, Austin, Texas 78758, United States
| | - James E. McGrath
- Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
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815
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816
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Stevens DM, Mickols B, V. Funk C. Asymmetric reverse osmosis sulfonated poly(arylene ether sulfone) copolymer membranes. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.10.042] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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817
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Hermans S, Mariën H, Dom E, Bernstein R, Vankelecom IF. Simplified synthesis route for interfacially polymerized polyamide membranes. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.10.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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818
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Fabrication of porous matrix membrane (PMM) using metal-organic framework as green template for water treatment. Sci Rep 2014; 4:3740. [PMID: 24435326 PMCID: PMC3894563 DOI: 10.1038/srep03740] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 12/19/2013] [Indexed: 11/30/2022] Open
Abstract
Pressure-driven membranes with high porosity can potentially be fabricated by removing template, such as low water stability metal-organic frameworks (MOFs) or other nanoparticles, in polymeric matrix. We report on the use of benign MOFs as green template to enhance porosity and interconnectivity of the water treatment membranes. Significantly enhanced separation performance was observed which might be attributed to the mass transfer coefficient of the substrate layer increased in ultrafiltration (UF) application.
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819
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Albo J, Hagiwara H, Yanagishita H, Ito K, Tsuru T. Structural Characterization of Thin-Film Polyamide Reverse Osmosis Membranes. Ind Eng Chem Res 2014. [DOI: 10.1021/ie403411w] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jonathan Albo
- Department
of Chemical Engineering, Hiroshima University, 1-4-1 Kagayami-yama, Higashi-Hiroshima 739-8527, Japan
| | - Hideaki Hagiwara
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305−8565, Japan
| | - Hiroshi Yanagishita
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305−8565, Japan
| | - Kenji Ito
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305−8565, Japan
| | - Toshinori Tsuru
- Department
of Chemical Engineering, Hiroshima University, 1-4-1 Kagayami-yama, Higashi-Hiroshima 739-8527, Japan
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820
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Ritos K, Mattia D, Calabrò F, Reese JM. Flow enhancement in nanotubes of different materials and lengths. J Chem Phys 2014; 140:014702. [DOI: 10.1063/1.4846300] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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821
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Sukitpaneenit P, Chung TS. Fabrication and use of hollow fiber thin film composite membranes for ethanol dehydration. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.08.047] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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822
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823
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Ibrahim SM, Xu R, Nagasawa H, Naka A, Ohshita J, Yoshioka T, Kanezashi M, Tsuru T. Insight into the pore tuning of triazine-based nitrogen-rich organoalkoxysilane membranes for use in water desalination. RSC Adv 2014. [DOI: 10.1039/c4ra02772h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Variation of water ratio played an important role in the separation properties of TTESPT membranes in reverse osmosis applications.
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Affiliation(s)
- Suhaina M. Ibrahim
- Department of Chemical Engineering
- Hiroshima University
- Higashihiroshima, Japan
- Advanced Material Research Centre (AMREC)
- 09000 Kulim, Malaysia
| | - Rong Xu
- School of Petrochemical Engineering
- Changzhou University
- Changzhou, China
| | - Hiroki Nagasawa
- Department of Chemical Engineering
- Hiroshima University
- Higashihiroshima, Japan
| | - Akinobu Naka
- Department of Life Science
- Kurashiki University of Science and the Arts
- Kurashiki, Japan
| | - Joji Ohshita
- Department of Applied Chemistry
- Hiroshima University
- Higashihiroshima, Japan
| | - Tomohisa Yoshioka
- Department of Chemical Engineering
- Hiroshima University
- Higashihiroshima, Japan
| | - Masakoto Kanezashi
- Department of Chemical Engineering
- Hiroshima University
- Higashihiroshima, Japan
| | - Toshinori Tsuru
- Department of Chemical Engineering
- Hiroshima University
- Higashihiroshima, Japan
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824
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Xu Z, Michos I, Wang X, Yang R, Gu X, Dong J. A zeolite ion exchange membrane for redox flow batteries. Chem Commun (Camb) 2014; 50:2416-9. [DOI: 10.1039/c3cc47214k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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825
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Geise GM, Paul DR, Freeman BD. Fundamental water and salt transport properties of polymeric materials. Prog Polym Sci 2014. [DOI: 10.1016/j.progpolymsci.2013.07.001] [Citation(s) in RCA: 375] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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826
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Li X, Yang K, Su J, Guo H. Water transport through a transmembrane channel formed by arylene ethynylene macrocycles. RSC Adv 2014. [DOI: 10.1039/c3ra43545h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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827
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Wang Z, Ma H, Hsiao BS, Chu B. Nanofibrous ultrafiltration membranes containing cross-linked poly(ethylene glycol) and cellulose nanofiber composite barrier layer. POLYMER 2014. [DOI: 10.1016/j.polymer.2013.10.049] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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828
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Chen ML, Guo YC, Yang F, Liang JX, Cao ZX, Zhou ZH. A lanthanum chelate possessing an open-channel framework with water nanotubes: properties and desalination. Dalton Trans 2014; 43:6026-31. [DOI: 10.1039/c3dt52837e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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829
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Tsuru T, Sasaki S, Kamada T, Shintani T, Ohara T, Nagasawa H, Nishida K, Kanezashi M, Yoshioka T. Multilayered polyamide membranes by spray-assisted 2-step interfacial polymerization for increased performance of trimesoyl chloride (TMC)/m-phenylenediamine (MPD)-derived polyamide membranes. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.07.031] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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830
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831
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Surface modification of a commercial thin-film composite polyamide reverse osmosis membrane through graft polymerization of N-isopropylacrylamide followed by acrylic acid. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.07.025] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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832
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Hofs B, Schurer R, Harmsen D, Ceccarelli C, Beerendonk E, Cornelissen E. Characterization and performance of a commercial thin film nanocomposite seawater reverse osmosis membrane and comparison with a thin film composite. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.06.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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833
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Berezkin AV, Kudryavtsev YV. Hybrid approach combining dissipative particle dynamics and finite-difference diffusion model: Simulation of reactive polymer coupling and interfacial polymerization. J Chem Phys 2013; 139:154102. [DOI: 10.1063/1.4824768] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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834
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Polyamide thin-film composite membranes based on carboxylated polysulfone microporous support membranes for forward osmosis. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.06.003] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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835
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A carbon nanotube-infused polysulfone membrane with polyvinyl alcohol layer for treating oil-containing waste water. Sci Rep 2013; 3:1509. [PMID: 23518875 PMCID: PMC3605604 DOI: 10.1038/srep01509] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 03/04/2013] [Indexed: 11/08/2022] Open
Abstract
A carbon nanotube (CNT) integrated polymer composite membrane with a polyvinyl alcohol barrier layer has been prepared to separate oil from water for treatment of oil-containing waste water. The CNTs were synthesised using chemical vapour deposition, and a phase inversion method was employed for the blending of the CNTs in the polymer composite solution for casting of the membrane. Relative to the baseline polymer, an increase of 119% in the tensile strength, 77% in the Young's modulus and 258% in the toughness is seen for a concentration of 7.5% CNTs in the polymer composite. The permeate through the membrane shows oil concentrations below the acceptable 10 mg/L limit with an excellent throughput and oil rejection of over 95%.
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836
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Ge Q, Ling M, Chung TS. Draw solutions for forward osmosis processes: Developments, challenges, and prospects for the future. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.03.046] [Citation(s) in RCA: 350] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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837
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Saenz de Jubera AM, Herbison JH, Komaki Y, Plewa MJ, Moore JS, Cahill DG, Mariñas BJ. Development and performance characterization of a polyamide nanofiltration membrane modified with covalently bonded aramide dendrimers. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:8642-8649. [PMID: 23796139 DOI: 10.1021/es400765q] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A first generation of amine terminated aramide dendrimers (G1-NH2) was covalently attached to the polyamide (PA) active layer of a commercially available nanofiltration (NF) membrane. Amide bonds between G1-NH2 and PA free carboxylic groups were formed by activation of the carboxylic groups with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) or 2-chloro-1-methylpyridinium iodide (CMPI), followed by aminolysis. Dendrimer attachment was assessed by indirectly measuring the concentration of carboxylic groups and amine groups before and after membrane modification with RBS using yttrium and tungstate ions (Y(3+) and WO4(2-)) as ion probes. RBS analyses showed a decrease in the concentration of carboxylic groups and an increase in amine groups on the membrane active layer, consistent with dendrimers attaching covalently to the active layer. Permeation experiments with Rhodamine WT (R-WT) revealed that the water and solutes permeability decreased after modification with dendrimer G1-NH2. Water permeability of G1-NH2 modified membrane decreased by 16-19% using EDC combined with sulfo-N-hydroxysuccinimide (s-NHS), and by 17-33% using CMPI. The permeability of the electrolyte BaCl2 decreased by 54% after G1-NH2 modification using EDC/s-NHS and only by 20% using CMPI, the latter consistent with a weaker Donnan exclusion effect. The permeability of the larger solute R-WT decreased by 82% in modified G1-NH2 membranes when using EDC/s-NHS, and 64% for cross-linking reagent CMPI. Thus, the use of EDC/s-NHS was more favorable because it resulted in higher gains in solute rejection with lower losses in water permeability.
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Affiliation(s)
- Ana M Saenz de Jubera
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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838
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Structure influence of hyperbranched polyester on structure and properties of synthesized nanofiltration membranes. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.03.034] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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839
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Kiparsky M, Sedlak DL, Thompson BH, Truffer B. The Innovation Deficit in Urban Water: The Need for an Integrated Perspective on Institutions, Organizations, and Technology. ENVIRONMENTAL ENGINEERING SCIENCE 2013; 30:395-408. [PMID: 23983450 PMCID: PMC3746241 DOI: 10.1089/ees.2012.0427] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Accepted: 01/27/2013] [Indexed: 05/20/2023]
Abstract
Interaction between institutional change and technological change poses important constraints on transitions of urban water systems to a state that can meet future needs. Research on urban water and other technology-dependent systems provides insights that are valuable to technology researchers interested in assuring that their efforts will have an impact. In the context of research on institutional change, innovation is the development, application, diffusion, and utilization of new knowledge and technology. This definition is intentionally inclusive: technological innovation will play a key role in reinvention of urban water systems, but is only part of what is necessary. Innovation usually depends on context, such that major changes to infrastructure include not only the technological inventions that drive greater efficiencies and physical transformations of water treatment and delivery systems, but also the political, cultural, social, and economic factors that hinder and enable such changes. On the basis of past and present changes in urban water systems, institutional innovation will be of similar importance to technological innovation in urban water reinvention. To solve current urban water infrastructure challenges, technology-focused researchers need to recognize the intertwined nature of technologies and institutions and the social systems that control change.
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Affiliation(s)
- Michael Kiparsky
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Wheeler Institute for Water Law & Policy, UC Berkeley School of Law, University of California, Berkeley, California
- Corresponding author: Wheeler Institute for Water Law & Policy, UC Berkeley School of Law, University of California, Berkeley, CA 94705-7220. Phone: (510) 643-6044; Fax: (510) 643-4533. E-mail:
| | - David L. Sedlak
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Department of Civil & Environmental Engineering, University of California, Berkeley, California
| | - Barton H. Thompson
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Stanford Law School and Woods Institute for the Environment, Stanford University, Stanford, California
| | - Bernhard Truffer
- Engineering Research Center for Re-Inventing the Nation's Urban Water Infrastructure (ReNUWIt), National Science Foundation, Stanford, California
- Environmental Social Science Department, Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
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840
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Wang T, Dai L, Zhang Q, Li A, Zhang S. Effects of acyl chloride monomer functionality on the properties of polyamide reverse osmosis (RO) membrane. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.03.066] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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841
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Elma M, Yacou C, Diniz da Costa JC, Wang DK. Performance and long term stability of mesoporous silica membranes for desalination. MEMBRANES 2013; 3:136-50. [PMID: 24956942 PMCID: PMC4021940 DOI: 10.3390/membranes3030136] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 07/02/2013] [Accepted: 07/03/2013] [Indexed: 11/16/2022]
Abstract
This work shows the preparation of silica membranes by a two-step sol-gel method using tetraethyl orthosilicate in ethanolic solution by employing nitric acid and ammonia as co-catalysts. The sols prepared in pH 6 resulted in the lowest concentration of silanol (Si–OH) species to improve hydrostability and the optimized conditions for film coating. The membrane was tested to desalinate 0.3–15 wt % synthetic sodium chloride (NaCl) solutions at a feed temperature of 22 °C followed by long term membrane performance of up to 250 h in 3.5 wt % NaCl solution. Results show that the water flux (and salt rejection) decrease with increasing salt concentration delivering an average value of 9.5 kg m–2 h–1 (99.6%) and 1.55 kg m–2 h–1 (89.2%) from the 0.3 and 15 wt % saline feed solutions, respectively. Furthermore, the permeate salt concentration was measured to be less than 600 ppm for testing conditions up to 5 wt % saline feed solutions, achieving below the recommended standard for potable water. Long term stability shows that the membrane performance in water flux was stable for up to 150 h, and slightly reduced from thereon, possibly due to the blockage of large hydrated ions in the micropore constrictions of the silica matrix. However, the integrity of the silica matrix was not affected by the long term testing as excellent salt rejection of >99% was maintained for over 250 h.
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Affiliation(s)
- Muthia Elma
- FIMLab-Films and Inorganic Membrane Laboratory, School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia.
| | - Christelle Yacou
- FIMLab-Films and Inorganic Membrane Laboratory, School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia.
| | - João C Diniz da Costa
- FIMLab-Films and Inorganic Membrane Laboratory, School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia.
| | - David K Wang
- FIMLab-Films and Inorganic Membrane Laboratory, School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia.
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842
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Jin-hui P, Hai-bo Z, Zhen-hua J. SYNTHESIS,MOLECULAR DESIGN AND PROPERTIES OF POLY(ARYLENE ETHER KETONE) RESINS. ACTA POLYM SIN 2013. [DOI: 10.3724/sp.j.1105.2013.12428] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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843
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La YH, Diep J, Al-Rasheed R, Miller D, Krupp L, Geise GM, Vora A, Davis B, Nassar M, Freeman BD, McNeil M, Dubois G. Enhanced desalination performance of polyamide bi-layer membranes prepared by sequential interfacial polymerization. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.02.044] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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844
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Liu L, Chen X. Fast Ion Transport and Phase Separation in a Mechanically Driven Flow of Electrolytes through Tortuous Sub-Nanometer Nanochannels. Chemphyschem 2013; 14:2413-8. [DOI: 10.1002/cphc.201300201] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Indexed: 11/09/2022]
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845
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Amini M, Jahanshahi M, Rahimpour A. Synthesis of novel thin film nanocomposite (TFN) forward osmosis membranes using functionalized multi-walled carbon nanotubes. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.01.041] [Citation(s) in RCA: 173] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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846
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847
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de Lannoy CF, Jassby D, Gloe K, Gordon AD, Wiesner MR. Aquatic biofouling prevention by electrically charged nanocomposite polymer thin film membranes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:2760-2768. [PMID: 23413920 DOI: 10.1021/es3045168] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Electrically conductive polymer-nanocomposite (ECPNC) tight nanofiltration (NF) thin film membranes were demonstrated to have biofilm-preventing capabilities under extreme bacteria and organic material loadings. A simple route to the creation and application of these polyamide-carbon nanotube thin films is also reported. These thin films were characterized with SEM and TEM as well as FTIR to demonstrate that the carbon nanotubes are embedded within the polyamide and form ester bonds with trimesoyl chloride, one of the monomers of polyamide. These polymer nanocomposite thin film materials boast high electrical conductivity (∼400 S/m), good NaCl rejection (>95%), and high water permeability. To demonstrate these membranes' biofouling capabilities, we designed a cross-flow water filtration vessel with insulated electrical leads connecting the ECPNC membranes to an arbitrary waveform generator. In all experiments, conducted in highly bacterially contaminated LB media, flux tests were run until fluxes decreased by 45 ± 3% over initial flux. Biofilm-induced, nonreversible flux decline was observed in all control experiments and a cross-flow rinse with the feed solution failed to induce flux recovery. In contrast, flux decrease for the ECPNC membranes with an electric potential applied to their surface was only caused by deposition of bacteria rather than bacterial attachment, and flux was fully recoverable following a short rinse with the feed solution and no added cleaning agents. The prevention of biofilm formation on the ECPNC membranes was a long-term effect, did not decrease with use, and was highly reproducible.
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848
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Zhao Y, Vararattanavech A, Li X, Hélixnielsen C, Vissing T, Torres J, Wang R, Fane AG, Tang CY. Effects of proteoliposome composition and draw solution types on separation performance of aquaporin-based proteoliposomes: implications for seawater desalination using aquaporin-based biomimetic membranes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:1496-1503. [PMID: 23311686 DOI: 10.1021/es304306t] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Aquaporins are a large family of water transport proteins in cell membranes. Their high water permeability and solute rejection make them potential building blocks for high-performance biomimetic membranes for desalination. In the current study, proteoliposomes were prepared using AquaporinZ from Escherichia coli cells, and their separation properties were characterized by stopped-flow measurements. The current study systematically investigated the effect of proteoliposome composition (lipid type, protein-to-lipid ratio (PLR), and the addition of cholesterol) on water permeability and NaCl retention. Among the various lipids investigated, 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC)-based proteoliposomes were found to have excellent osmotic water permeability and NaCl reflection coefficient values. Increasing the PLR of DOPC proteoliposomes up to 1:200 increased their osmotic water permeability. However, further increase in the PLR reduced the osmotic water permeability probably due to the occurrence of defects in the proteoliposomes, whereas the addition of cholesterol improved their osmotic water permeation likely due to defects sealing. The current study also investigated the effect of major dissolved ions in seawater (e.g., Mg(2+) and SO(4)(2-)) on the stability of proteoliposomes, and design criteria for aquaporin-based biomimetic membranes are proposed in the context of desalination.
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Affiliation(s)
- Yang Zhao
- Singapore Membrane Technology Centre, Nanyang Technological University, Singapore 639798
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849
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Preparation and characterization of novel acetylated cellulose ether (ACE) membranes for desalination applications. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2012.10.043] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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850
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Khan MR, Rafiuddin. Synthesis, characterization and properties of polystyrene incorporated calcium tungstate membrane and studies of its physicochemical and transport behavior. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.07.057] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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