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Takeshi Kataoka

Bio: Takeshi Kataoka is an academic researcher from Osaka Prefecture University. The author has contributed to research in topics: Ion exchange & Adsorption. The author has an hindex of 17, co-authored 60 publications receiving 1025 citations.


Papers
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TL;DR: In this article, two cross-linked chitosan fibers (ChF-A and ChF-B) were developed for use as adsorbents or ion exchangers for the recovery of dyestuffs.

186 citations

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TL;DR: In this paper, the parallel transport of a protein by surface and pore diffusion within a highly porous ion exchanger is studied by measuring equilibria and uptake curves for adsorption of bovine serum albumin (BSA) on two different strongly basic chitosan ion exchangers (hard gels): Ch-2503 and ch-2507 at pH 6.9 and 298 K.
Abstract: The parallel transport of a protein by surface and pore diffusion within a highly porous ion exchanger is studied by measuring equilibria and uptake curves for adsorption of bovine serum albumin (BSA) on two different strongly basic chitosan ion exchangers (hard gels): Ch-2503 and Ch-2507 at pH 6.9 and 298 K. Experimenlal equilibrium isotherms are correlated by the Langmuir equation. Intraparticle effective diffusivities of BSA (D eff ) are determined from the homogeneous Fickian diffusion model, increasing with the bulk phase concentration increase of BSA (Co). It suggests the existence of parallel diffusion. The surface diffusivity D s for the parallel diffusion model is determined from the D eff , and D s =0.47X10 -13 m 2 /s (Ch-2507) and 2.4X10 -13 m 2 /s (Ch-2503) were obtained. Pore diffusivities based on the pore diffusion control (D' p ) are obtained by matching the shrinking core model with the experimental uptake curves. D' p decreases with increasing C 0 . Since D' p in Ch-2507 is constant when c 0 ≥1 kg/m 3 , the constant value 2.7X10 -11 m 2 /s is taken as the accurate pore diffusivity (D p ). As D' p in Ch-2503 does not approach a constant value, D p =1.0X10 -11 m 2 /s is determined by matching the parallel diffusion model with the uptake data, and the model calculated using experimental values of D s and D p agrees reasonably well with the uptake data for Ch-2507 and Ch-2503. This theoretical approach may be applied not only for intraparticle diffusion of proteions but any adsorbates in porous materials

161 citations

Journal ArticleDOI
TL;DR: In this article, the hydraulic radius model was applied to laminar flow in a packed bed and assuming that mass transfer in the packed bed is analogous to that between a pipe surface and a stream of liquid with steady velocity profile, liquid-phase mass transfer from the packed solid sphere was analyzed and an approximate solution was proposed.
Abstract: Applying the hydraulic radius model to laminar flow in a packed bed and assuming that mass transfer in the packed bed is analogous to that between a pipe surface and a stream of liquid with steady laminar velocity profile, liquid-phase mass transfer from the packed solid sphere was analyzed and an approximate solution is proposed. Further liquidfilm mass transfer coefficients were measured for benzoic acid-water system. From these results, together with previous data, it was found that the proposed equation agrees with data in Re'^10, both this equation and Carberrys equation can be applied for ]0100.

118 citations

Journal ArticleDOI
TL;DR: In this paper, the characteristic coefficients of ions in Neosepta and Selemion cation exchange membranes were measured and compared with those of Nafion Cation Exchange membranes obtained previously.
Abstract: The characteristic coefficients of ions in Neosepta and Selemion cation exchange membranes were measured and compared with those of Nafion cation exchange membranes obtained previously. It was found that the exchange affinities of the cation exchange membranes used were represented as H +

38 citations

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TL;DR: In this paper, the mass transfer rates in lysozyme extraction between an aqueous KCl solution and an bis(2-ethyl)sodium sulfosuccinate (AOT)-isooctane reversed micellar solution were investigated using a stirred cell with a flat liquid-liquid interface.

33 citations


Cited by
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Journal ArticleDOI
Eric Guibal1
TL;DR: In the case of metal anions, the metal cations can be adsorbed by chelation on amine groups of chitosan in near neutral solutions as discussed by the authors.

1,625 citations

Journal ArticleDOI
TL;DR: By ion exchange undesirable ions are replaced by others which don't contribute to contamination of the environment by means various modern types of ion exchangers.

1,400 citations

Journal ArticleDOI
TL;DR: In this paper, the limitations of the Fick's law for describing diffusion are discussed and it is argued that the Maxwell-Stefan formulation provides the most general and convenient approach for describing mass transport which takes proper account of thermodynamic non-idealities and influence of external force fields.

1,323 citations

Journal ArticleDOI
TL;DR: An extended Langmuir model has been used to predict the isotherm data for the binary systems using the single component data, and the linear transform model provided the highest R(2) regression coefficient with the Redlich-Peterson model.

931 citations

Journal ArticleDOI
TL;DR: This review paper discusses major research topics related to chitosan and its derivatives for application in the removal of dyes from water and provides better opportunity for researchers to better explore the potential of chito-derived adsorbents for removal of a great variety of d dye.

841 citations