Chemical cleaning of UF membranes fouled by BSA

Kuzmenko, Denis; Arkhangelsky, Elizabeth; Belfer, S.; Freger, Viatcheslav; Gitis, Vitaly

doi:10.1016/j.desal.2004.11.078

Cited by 132 publications

(78 citation statements)

References 9 publications

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“…All the membranes were integrally skinned asymmetric membranes that differ in nominal molecular weight cut-off (MWCO), chemical tolerance and mechanical strength. Previously reported data [10,16,17] for nominal MWCO, contact angle and permeability available for these membranes is summarized in Table 1. In the current study, the membranes were characterized in terms of ultimate tensile strength, ultimate elongation, and Young's modulus of elasticity.…”

Section: Membrane Degradation Experimentsmentioning

confidence: 99%

“…In the current study, the membranes were characterized in terms of ultimate tensile strength, ultimate elongation, and Young's modulus of elasticity. Mechanical characterization was complemented [10,16,17] with ATR-FTIR spectroscopy, and visualization of the PES membrane surfaces was performed with scanning probe microscopy (SPM). All the membranes were supplied as flat sheets and were stored dry under ambient conditions.…”

Section: Membrane Degradation Experimentsmentioning

confidence: 99%

“…However, in routine water treatment operation the membrane surface continuously undergoes fouling with the organic materials [10] that are commonly found in the source water. In order to minimize the flux losses, the foulants are removed by hydraulic and chemical cleaning; the latter is often performed with hypochlorite, due to its ready availability, reasonable price and high efficiency for both cleaning and short bio-sanitation actions.…”

Section: Introductionmentioning

confidence: 99%

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Hypochlorite Cleaning Causes Degradation of Polymer Membranes

Arkhangelsky

Kuzmenko

Gitis³

et al. 2007

Tribol Lett

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Polymer membranes are often used in water treatment industry, as a reliable economic solution for purification of surface water streams. Among a variety of membrane processes the ultrafiltration (UF) membranes combine high pathogen removal ability with minimal energy consumption. Since the membranes are considered to be chemically and mechanically stable, in-place cleaning is routinely performed with strong oxidizing agents, such as hypochlorite. The results of the current study, however, clearly indicate that the mechanical strength of UF membranes deteriorates upon hypochlorite cleaning. Values of ultimate tensile strength, ultimate elongation and Young's modulus decreased as the dose (concentration · contact time) of hypochlorite was increased, with the decreases being more marked for cellulose acetate membranes than for polyethersulfone membranes. Scanning probe microscopy showed membrane aging in response to hypochlorite treatment. The aging was related to gradual chain breaking in membrane skin layer, as reflected by the disappearance of O-C-O and C-S absorbance peaks in ATR-FTIR spectra of treated cellulose acetate and polyethersulfone membranes, respectively. Since the degree of scission was linearly related to the deterioration in ultimate tensile strength, we here propose that ultimate tensile strength measurements can be used as a simple macroscopic test for periodic inspection of the degree of degradation of UF membranes exposed to in-place chemical cleaning.

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Section: Membrane Degradation Experimentsmentioning

confidence: 99%

Section: Membrane Degradation Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hypochlorite Cleaning Causes Degradation of Polymer Membranes

Arkhangelsky

Kuzmenko

Gitis³

et al. 2007

Tribol Lett

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“…However at high pH the protein tend to have negative charge. Due the same charged to both protein and membrane, the flux value increases [9,14]. Figure 3 illustrates the effect of pH to BSA rejection performance (%R).…”

Section: The Influence Of Ph On Permeation and Rejectionmentioning

confidence: 99%

“…According to Kuzmenko et al, at pH 2.9 and 5.3 the membrane charge are weak and did not interrupt the charge of bovine serum albumin (BSA). But at pH 7.4 where both BSA and PES membrane have the same charge, the repulsion effect held part of BSA at some distance from the membrane surface, thus minimizing flux values [9].…”

Section: 10 Introductionmentioning

confidence: 99%

Effect of pH on Bovine Serum Albumin (BSA) Solution to Polysulfone-based Membrane

et al. 2014

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In this work, polysulfone (PSf) flat sheet membrane was prepared via phase inversion technique. The effects of polyethylene glycol (PEG) additive on membrane performance were observed and investigated. The membrane permeation was evaluated in terms of pure water flux (PWF) and solute rejection at different pHs (pH 3, pH 5, pH 7 and pH 9). Bovine serum albumin (BSA) solution was used to study the performance of the prepared membrane. Results showed that the increase of PEG concentration led to higher PWF. This is due to PEG role as a pore forming agent in casting solution. The PWF was found to increase up to 101.85 LMH at 5% PEG. However, the PWF decrease when the PEG concentration is increased up to 7% and 9%. Similarly, flux rate at different pH showed the same plot as PWF. At pH 9, the PWF is high compared to pH 3, pH 5 and pH 7. The BSA rejection data at pH 3 and pH 5 shows the high rejection compared to pH 7 and pH 9. No significant changes were observed when PEG concentration was increased. As a conclusion, the addition of PEG has improved the performance of membrane in terms of PWF at a certain percentage (with the highest was given at 5%) of PSf membrane. It is also evidenced that the % of BSA rejection increased with decreasing pH.

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Characterization of Ceramic Membranes

2007

Ceramic Membranes for Separation and Reaction

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Chemical cleaning of UF membranes fouled by BSA

Cited by 132 publications

References 9 publications

Hypochlorite Cleaning Causes Degradation of Polymer Membranes

Hypochlorite Cleaning Causes Degradation of Polymer Membranes

Effect of pH on Bovine Serum Albumin (BSA) Solution to Polysulfone-based Membrane

Characterization of Ceramic Membranes

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