Using micelles to determine the pore size of UF membranes

Issid, Ibrahim; Lavergne, Marie-Anne; Lemordant, Daniel

doi:10.1016/0376-7388(92)80067-t

Cited by 11 publications

(1 citation statement)

References 20 publications

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“…The effect of ionic strength on thuringiensin recovery was first studied. Figure 3 shows the recoveries in MEUF experiments could be significantly decreased by adding of NaCl, due to neutralization of the micelle charge (Issid et al, 1992). In this sense, the ionic micelle could be regard as a neutral aggregate.…”

Section: Resultsmentioning

confidence: 96%

Recovery of Thuringiensin with Cetylpyridinium Chloride Using Micellar-Enhanced Ultrafiltration Process

1999

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A cationic cetylpyridinium chloride (CPC) surfactant-based micellar-enhanced ultrafiltration (MEUF) process was used to recover thuringiensin from the supernatant of Bacillus thuringeinsis fermentation broth. Several different strategies of manipulating process variables, such as ionic strength, pH, CPC concentration, micelle formation temperature, and membrane pore size, were investigated. It was found that CPC concentration and membrane pore size were two major factors to the increase of thuringiensin recovery, while the ionic strength and pH adjustments were not necessary and micelle formation temperature was not important within the temperature range studied. Finally, a novel two-step MEUF processing scheme was developed which includes microfiltration and two-step ultrafiltration (UF) processes. The thuringiensin recovery up to 94.6% was attained when an initial CPC concentration of 4% (w/v) and UF membrane of molecular weight cutoff (MWCO) of 3000 was used in conjunction with the previous UF process using a MWCO 30 000 membrane. The bioassay results showed that the spray-dried thuringiensin with CPC was more toxic to fly larvae than without CPC. This research demonstrated that CPC not only facilitated thuringiensin recovery but also improved the insecticidal effect.

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Section: Resultsmentioning

confidence: 96%

Recovery of Thuringiensin with Cetylpyridinium Chloride Using Micellar-Enhanced Ultrafiltration Process

1999

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Characterization of Ceramic Membranes

2007

Ceramic Membranes for Separation and Reaction

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Membrane Integrity Monitoring

Gitis

Rothenberg

2013

Encyclopedia of Membrane Science and Technology

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This article overviews the principles, advantages, and disadvantages of membrane integrity tests with emphasis on their sensitivity, reliability, and feasibility for various types of membranes. The 10 integrity tests presented are grouped into four categories: pressure‐based, marker‐based, visualization, and acoustic sensing. The methods detailed here include pressure and vacuum decay tests (PDT/VDT), diffuse air flow (DAF), bubble point, TOC profiling, and sonic sensing currently used in industry.

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Using micelles to determine the pore size of UF membranes

Cited by 11 publications

References 20 publications

Recovery of Thuringiensin with Cetylpyridinium Chloride Using Micellar-Enhanced Ultrafiltration Process

Recovery of Thuringiensin with Cetylpyridinium Chloride Using Micellar-Enhanced Ultrafiltration Process

Characterization of Ceramic Membranes

Membrane Integrity Monitoring

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