Three independent ways to obtain information on pore size distributions of nanofiltration membranes

Otero, José; Mazarrasa, Olav; Villasante, Juliana; Silva, Verónica; Prádanos, Pedro; Calvo, José Ignacio Madalena; Hernández, Antonio

doi:10.1016/j.memsci.2007.09.065

Cited by 119 publications

(62 citation statements)

References 40 publications

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“…A linear increase of the predicted pore radius with the solute size is clearly observed. This goes in accordance with previous observations for other membranes and uncharged solutes [3]. For this case, linear correlation relating both radii is: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 -23- Once pore radius is obtained as the fitting parameter of the model described in section 2, different two parameter distributions were tried to obtain the pore size distribution.…”

Section: Pore Radiussupporting

confidence: 94%

“…This permits an evaluation of the pore size distribution [3,[36][37][38] herein we summarize the fundamentals of the methodology founded by Tkacik and Michaels [39].…”

Section: Pore Size Distribution By Solute Retentionmentioning

confidence: 99%

“…But, since in these membranes the pore size is extremely small (about 1 nm) the result is strongly influenced by the method used. For this purpose various methods can be applied, for example: image analysis in atomic force microscopy, liquid-liquid displacement, or retention-flux models [3]. Though ideally they provide the same information, the final results reveal the peculiarities of each one [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…For this purpose various methods can be applied, for example: image analysis in atomic force microscopy, liquid-liquid displacement, or retention-flux models [3]. Though ideally they provide the same information, the final results reveal the peculiarities of each one [3,4]. The method of retention of neutral solutes is one of the most used because with uncharged solutes the interaction solute-membrane is minimized.…”

Section: Introductionmentioning

confidence: 99%

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Pore size analysis from retention of neutral solutes through nanofiltration membranes. The contribution of concentration–polarization

et al. 2014

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Pore size distribution is one of the most important characteristics of a membrane.This can be obtained from the fitting of pore radius calculated from retention versus flux measurements for a set of solute solutions. In this work a set of non-charged similar molecules are chosen as solutes to minimize other interactions apart of those related to size. The hydrodynamic model will be used to characterize the behavior of the membrane to uncharged solutes, assuming that membrane pores are straight and cylindrical.As is known, the phenomenon of concentration polarization must be taken into account because true retention is not experimentally accessible by concentration measurements. Frequently, the film layer model is applied for the dependence of

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Section: Pore Radiussupporting

confidence: 94%

“…This permits an evaluation of the pore size distribution [3,[36][37][38] herein we summarize the fundamentals of the methodology founded by Tkacik and Michaels [39].…”

Section: Pore Size Distribution By Solute Retentionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pore size analysis from retention of neutral solutes through nanofiltration membranes. The contribution of concentration–polarization

et al. 2014

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“…The values of the constants are presented in Table 2 [42] and are a result of detailed studies from Deen [43] and Bowen et al [44] and [45]. = (1 − ) 2 …”

Section: Equationmentioning

confidence: 99%