NAMS 2002 Workshop - ICOM 2008

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Nanofiltration and Reverse Osmosis II - Imaging and Characterization – 6 Tuesday July 15, 11:30 AM-12:00 PM, Maui Evidence of Change in the Top Surface Layer Structure of Nanofiltration Membranes Due to Operating Temperature Variation H. Saidani, Ecole Nationale des Ingénieurs de Tunis, France B. Nihel, Ecole Nationale des Ingénieurs de Tunis, France P. John, Université Paul Sabatier, France D. Andre (Speaker), Université Montpellier 2, France, Andre.Deratani@iemm.univ-montp2.fr The applications of nanofiltration (NF) in the treatment of water and wastewater is developing very quickly. Of special concern for this application is the influence of temperature on the performances of NF membranes, because water to be treated can be at temperatures higher than 40°C. The temperature effect is not yet well understood [1] and is usually described through a simple correction factor applied to the water permeability. The present report shows the influence of operating temperature variation on the permeability and the rejection of neutral and charged solutes. Two commercial NF membranes were used in the course of this study, the DESAL DK (GE Water Technologies -USA) and NF90 (Dow / Filmtec - USA). The results obtained show an important variation of membrane performances with temperature change both in terms of flux and rejection. Interestingly, while the DESAL DK exhibits the expected flux increase (due to a decrease in solution viscosity) and rejection decrease with increasing temperature, the NF90 shows the opposite trend. Moreover, it was observed that this variation becomes irreversible if the operating temperature exceeds a critical temperature (Tc), which depends on the membrane type. To understand these phenomena, the thermal behavior of the top surface layer for each NF membrane was investigated. It was found that Tc corresponds to the glass transition temperature Tg of the polymer constituting the membrane top active layer. The pore size and effective layer thickness were estimated using the Nanoflux® NF modeling software [2]. The NF data are interpreted in terms of structural changes occurring during temperature cycles that are intimately related to the intrinsic thermal properties of the polymeric materials. [1] Nihel Ben Amar, Hafedh Saidani, André Deratani, John Palmeri, Effect Of Temperature On The Transport Of Water And Neutral Solutes Across Nanofiltration Membranes, Langmuir 23, 2937 (2007).
[2] Palmeri, J., Sandeaux, R. Sandeaux, X. Lefebvre, P. David, C. Guizard, P. Amblard, J.F. Diaz, B. Lamaze, Modeling of multi-electrolyte transport in charged ceramic and organic nanofilters using the computer simulation program NANOFLUX, Desalination 147 231 (<strong>2002</strong>).
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ICOM 2008 Oral Presentation Proceed
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Professor Yoram Cohen Professor Joh
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ICOM 2008 Staff: The University of
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ICOM 2008 Workshop Schedule: Saturd
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Monday, July 14 - Afternoon Session
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Tuesday, July 15 - Afternoon Sessio
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8:15AM 8:35AM EMS Barrer Prize (Mau
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Friday, July 18 - Morning Sessions
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Oral Presentation Abstracts Morning
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Gas Separation I - 1 - Keynote Mond
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esulting permeability selectivity o
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chain packing. To ensure a well pha
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Gas Separation I - 5 Monday July 14
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satisfactory way the corresponding
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Drinking and Wastewater Application
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an adjusted water management in the
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prospect for new energy sources as
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oxygen removal to the desired pH. C
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(Cl - , SO4 2- , As(V)) and water t
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[1] R. Lima de Miranda, J. Kruse, K
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Polymeric Membranes I - 4 Monday Ju
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Polymeric Membranes I - 5 Monday Ju
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Biomedical and Biotechnology I - 1
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Acknowledgments The Authors acknowl
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isolation of CD34+ cells was achiev
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membranes were then challenged with
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in crossflow mode operation were in
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hydroxide. For Mg/Ca = 0, the fouli
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improvement of filterability also t
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scale where fouling rates are commo
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observed in two subsequence phenome
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Membrane Modeling I - Fundamental A
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Membrane Modeling I - Fundamental A
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of the impact of the operating para
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Oral Presentation Abstracts Afterno
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Hybrid and Novel Processes I - 2 Mo
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Arora, M.B., J.A. Hestekin, S.W. Sn
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Conclusions Reverse electrodialysis
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energy recovery. This is a remarkab
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eaction with mediator due to the co
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Nanofiltration and Reverse Osmosis
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4.3x10 -6 to 7.4x10 -6 cm 2 /s. Bas
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The development of these membranes
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permeability, defined as water perm
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supports including charged (PSF/SPE
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[4] L. M. Robeson, Journal of Membr
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y conventional polymers and provide
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[3] P.M. Budd, K.J. Msayib, C.E. Ta
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Nanostructured Membranes I - 5 Mond
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Page 115 and 116: investigated at first. As a result,
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Page 127 and 128: Composite Polymeric Membrane Format
Page 135 and 136: NAMS Alan S. Michaels Award - 1a Tu
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Page 139 and 140: opportunities for improving membran
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Page 147 and 148: Nanofiltration and Reverse Osmosis
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Page 151 and 152: [4] K. Vanherck et al. Accepted for
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Page 169 and 170: Nanostructured Membranes II - 5 Tue
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Page 173 and 174: than 10 nm. XRD data suggest that t
Page 175 and 176: Pervaporation and Vapor Permeation
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Absorption of water was determined
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Gas Separation II - 1 - Keynote Tue
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Gas Separation II - 2 Tuesday July
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concentration. These results are co
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Gas Separation II - 5 Tuesday July
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will be shown that homogeneous film
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which can adsorb on the surface of
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were collected, the viable bacteria
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pressure, and permporosimetry with
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Inorganic Membranes I - 3 Tuesday J
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Membrane Fouling - UF & Water Treat
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Membrane Modeling II - Gas Separati
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[10] Wang BG, Lv HL, Yang JC. Chem
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Membrane and Surface Modification I
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Gas Separation III - 1 - Keynote We
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Gas Separation III - 2 Wednesday Ju
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separation was next blended with di
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Polymeric Membranes II - 1 - Keynot
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Polymeric Membranes II - 3 Wednesda
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5. Erdodi, G.; Kennedy, J. P.; Prog
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observed for different locations in
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Biomedical and Biotechnology II - 3
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applied in the first two fields wil
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distribution of SBMA units within t
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5500 ppm (15 mM) was lowered to 30
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increasing the effective size of th
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etween 0 and 1), the automatic feed
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Membrane Modeling III - Process Sim
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Membrane Modeling III - Process Sim
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models developed suggests that ther
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start level has a huge impact on th
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Ultra- and Microfiltration I - Tran
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all three binary protein UF systems
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Synthetic solutions of ±-lactalbum
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Gas Separation IV - 2 Thursday July
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6. T. C. Merkel, Z. He, I. Pinnau,
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EMS Barrer Prize - 1b Thursday July
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EMS Barrer Prize - 3 Thursday July
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EMS Barrer Prize - 4b Thursday July
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EMS Barrer Prize - 5 Thursday July
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therapy options have been modelled
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Ultra- and Microfiltration II - Pro
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in the vicinity of the rising bubbl
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of feed water ionic strength) on re
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technology that has gained growing
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Optimize polymeric membranes for sa
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Inorganic Membranes II - 2 Thursday
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confirms that the carbon dioxide pe
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permeability, stability issues comp
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Fuel Cells II - 2 Thursday July 17,
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5. Conclusion In this work, the evo
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Oral Presentation Abstracts Afterno
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an essentially pure H2 product is c
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In the presentation, we will presen
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was observed, indicative of the sim
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References Arora, M.B., J.A. Hestek
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performance of fibers is analyzed a
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Membrane Fouling III - RO & Biofoul
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Pervaporation and Vapor Permeation
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[4] H. Noureddini, Book of Abstract
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component (PX, OX) separation via p
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Generally these results were in goo
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introduction of methyl groups into
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separation quality (10 µS/cm) and
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Desalination II - 3 Thursday July 1
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drop are linearly related (although
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antiscalant oxidation has been limi
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oth 15±5 kDa, which suggests that
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Atomic Force Microscopy (AFM), and
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y single gas permeation experiments
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PDMS toplayers were only partially
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noting that cross-linking agents co
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such extended parameter space in th
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Hybrid Membranes - 6 Thursday July
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Plenary Lecture III Friday July 18.
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Gas Separation V - 1 - Keynote Frid
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References: [1] H. Lin, E. Van Wagn
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elative contributions of Fickian di
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Gas Separation V - 4 Friday July 18
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Gas Separation V - 6 Friday July 18
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Electron Microscopy (TEM) analyses
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- Hybrid RO train: A hybrid RO trai
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concentration as well as on the sod
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scaling deposits in the DCMD device
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Silica colloidal solution with diff
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Membrane Fouling IV - RO & Desalina
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Polyacrylonitrile (PAN) UF membrane
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the polymer dope was PEI (12 wt%),
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Inorganic Membranes III - 1 - Keyno
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Inorganic Membranes III - 2 Friday
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CO2/H2 selectivity at high temperat
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ammonia complexes in aqueous soluti
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possible to have a membrane capable
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fired boiler flue gas, SOx and merc
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EPR/Ago/p-benzoquinone composite sh
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elated to the presence of free elec
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surroundings. When the temperature
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that no absorbent was detected in t
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days of filtration from 120 to 7-10
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was performed to restore membrane f
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with the SRT of 65 days, no correla
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Results Critical flux measurements
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MLSS is not directly proportional t
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Fuel Cells III - 2 Friday July 18,
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Fuel Cells III - 4 Friday July 18,
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Ultra- and Microfiltration III - Me
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can be deduced from the imaginary p
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membranes. The analysis of the ligh
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Membrane Contactors - 2 Friday July
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absorption liquid in the pores of t
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Packaging and Barrier Materials - 1
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Historically, all the approaches de
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