NAMS 2002 Workshop - ICOM 2008

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detected, this value increased with increasing number of polyelectrolyte layers adsorbed to the membrane surface in the case when the feed components (here bovine serum albumin) and the surface are equally charged (repulsive electrostatic forces). For a three-layer membrane (PAAc/PDADMAC/PAAc) a critical flux > 60 l/m2h was determined. In the case of attractive electrostatic forces a dramatic fouling was observed. [1] R. W. Field; D. Wu; J. A. Howell; B. B.Gupta; J. Membr. Sci. 100, 259 (1995) [2] J. A: Howell; J: Membr. Sci. 107, 165 (1995) [3] P. Bacchin, P. Aimar, R. W. Field; J. Membr. Sci. 281, 42 (2006) [4] M. Müller et al.; Macromol. Rapid Commun. 19, 333 (1998) [5] T. Rieser et al.; ACS Symposium Series 744, Edts. I. Pinnau. B. D. Freeman; ACS, Washington (1999), p. 189 [6] T. Carroll, N. A. Booker, J. Meier-Haack; J. Membr. Sci. 203, 3 (<strong>2002</strong>) [7] J. Meier-Haack, S: Derenko, J. Seng; Sep. Sci. Technol. 42, 2881 (2007)
Membrane Fouling III - RO & Biofouling – 6 Thursday July 17, 5:00 PM-5:30 PM, Maui Synthesis and Evaluation of Novel Biocidal Coatings to Reduce Biofouling on Reverse Osmosis Membranes M. Hibbs (Speaker), Sandia National Laboratories, Albuquerque, New Mexico, USA - mhibbs@sandia.gov C. Cornelius, Virginia Poytechnic Institute and State University, Blacksburg, Virginia, USA L. McGrath, Sandia National Laboratories, Albuquerque, New Mexico, USA S. Altman, Sandia National Laboratories, Albuquerque, New Mexico, USA S. Kang, Yale University, New Haven Connecticut, USA A. Adout, Yale University, New Haven Connecticut, USA M. Elimelech, Yale University, New Haven Connecticut, USA Reverse osmosis (RO) is a membrane-based separation process that is commonly used in industrial applications such as desalination and waste-water treatment. The major problems associated with membrane-based separation processes include fouling and high pressure loss, which decrease the efficiency of the filtration while increasing operation costs. Quaternary ammonium compounds (QACs) are among the most widely used antibacterial agents and polymers containing ammonium salts have been shown to possess enhanced antibacterial activity with reduced toxicity and prolonged lifetimes. An RO membrane coated with such a polymer should prove resistant to biofouling and thus more efficient over its useful lifetime. Novel ionomers have been prepared from a poly(arylene ether sulfone) with benzyl trialkylammonium groups randomly attached in a postpolymerization step. The alkyl chain lengths were varied among the different ionomers because this has been reported to be a crucial factor in establishing the biocidal activity of QACs. All of the polymers were soluble in alcohols with the aid of a surfactant and, unlike most polymers with quaternary ammonium groups, they were insoluble in water. However, they were hydrophilic and swelled in water, key features which allowed water to pass through them. The polymer solutions could be sprayed onto RO membranes to form thin coatings. Contact angle, streaming potential, and AFM interaction forces were measured for the coated surfaces. Testing for cell adhesion and antibacterial properties with E. coli showed that all of the coatings had significant biotoxicity. Results from accelerated biofouling tests in a cross-flow RO system will also be discussed. Sandia is a multi-program laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under Contract DE-ACO4-94AL85000.
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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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Fuel Cells I - 1 Monday July 14, 2:
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investigated at first. As a result,
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Desalination I - 2 Monday July 14,
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Composite Polymeric Membrane Format
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NAMS Alan S. Michaels Award - 1a Tu
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NAMS Alan S. Michaels Award - 2 Tue
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opportunities for improving membran
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NAMS Alan S. Michaels Award - 4b Tu
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[4] K. Vanherck et al. Accepted for
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accumulation had a strong effect on
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and, if so, to develop correlations
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non-porous and porous membranes are
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[2] Palmeri, J., Sandeaux, R. Sande
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fouling. Information obtained from
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This work performed under the auspi
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etween Ru(bi-pyridine)3 2+ and meth
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[1] M. Barboiu, C. Luca, C. Guizard
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Nanostructured Membranes II - 5 Tue
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Nanostructured Membranes II - 6 Tue
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than 10 nm. XRD data suggest that t
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Pervaporation and Vapor Permeation
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ethanol/butanol (non solvent) combi
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forward osmosis, the RO process is
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Osmotically Driven Membrane Process
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References: [1] Stupp, S. I.; Lebon
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temperatures might bring about the
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References [1] S. Benita, Microenca
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solvent, were investigated (where a
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ease of manipulation as this allows
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Horizontal shrinkage does not have
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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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Page 397 and 398: 5. Conclusion In this work, the evo
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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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