The Experts below are selected from a list of 75 Experts worldwide ranked by ideXlab platform

Shing-yi Suen - One of the best experts on this subject based on the ideXlab platform.

  • Adsorptive removal of anionic dye by inorganic―organic hybrid anion-exchange membranes
    Journal of Membrane Science, 2009
    Co-Authors: Hsin-chieh Chiu, Chia-hung Liu, Shiow-ching Chen, Shing-yi Suen
    Abstract:

    Abstract Anion-exchange membranes with quaternary ammonium groups were prepared by coating a precursor with secondary amino groups (the product of N-[3-(trimethoxysilyl)propyl] ethylene diamine and 3-(triethoxysilyl)propyl isocyanate) on porous glass fiber membranes and further treated with bromoethane. The precursor coating and bromoethane treatment have been proved successful by membrane characterization such as Fourier-transform infrared (FTIR) spectrum, scanning electron microscopy (SEM) photo, contact angle, water content, and ion-exchange capacity. The optimal Feed precursor/dimethyl formamide (DMF) ratio was found as 1:3 (w/w) based on the batch adsorption results of anionic dye Cibacron blue 3GA. The membrane ion-exchange capacity for this condition was 6.8 μmol/cm2 (or 104.2 μmol/cm3) and the maximum dye adsorption capacity was 2.12 mg/cm3. Different desorption Solutions were tested in batch desorption process, and the use of 1N KSCN in 60% methanol attained a better performance (70% desorption). In the chromatography process with two pieces of 47 mm modified anion-exchange membrane discs (loading at 1 mL/min; washing and elution at 8 mL/min), more than 92% of dye molecules could be recovered from a 20 mL Feed Aqueous Solution with an initial dye concentration of 0.05 g/L. Moreover, the membrane performance remained unaltered over 10 successive cycles of dye adsorption, washing, and elution.

  • Adsorptive removal of anionic dye by inorganic–organic hybrid anion-exchange membranes
    Journal of Membrane Science, 2009
    Co-Authors: Hsin-chieh Chiu, Chia-hung Liu, Shiow-ching Chen, Shing-yi Suen
    Abstract:

    Anion-exchange membranes with quaternary ammonium groups were prepared by coating a precursor with secondary amino groups (the product of N-[3-(trimethoxysilyl)propyl] ethylene diamine and 3-(triethoxysjlyl)propyl isocyanate) on porous glass fiber membranes and further treated with bromoethane. The precursor coating and bromoethane treatment have been proved successful by membrane characterization such as Fourier-transform infrared (FTIR) spectrum, scanning electron microscopy (SEM) photo, contact angle, water content, and ion-exchange capacity. The optimal Feed precursor/dimethyl formamide (DMF) ratio was found as 1: 3 (w/w) based on the batch adsorption results of anionic dye Cibacron blue 3GA. The membrane ion-exchange capacity for this condition was 6.8 mu mol/cm(2) (or 104.2 mu mol/cm(3)) and the maximum dye adsorption capacity was 2.12 mg/cm(3). Different desorption Solutions were tested in batch desorption process, and the use of 1 N KSCN in 60% methanol attained a better performance (70% desorption). In the chromatography process with two pieces of 47 mm modified anion-exchange membrane discs (loading at 1 mL/min; washing and elution at 8 mL/min), more than 92% of dye molecules could be recovered from a 20 mL Feed Aqueous Solution with an initial dye concentration of 0.05 g/L. Moreover, the membrane performance remained unaltered over 10 successive cycles of dye adsorption, washing, and elution. (C) 2009 Elsevier B.V. All rights reserved

Hsin-chieh Chiu - One of the best experts on this subject based on the ideXlab platform.

  • Adsorptive removal of anionic dye by inorganic―organic hybrid anion-exchange membranes
    Journal of Membrane Science, 2009
    Co-Authors: Hsin-chieh Chiu, Chia-hung Liu, Shiow-ching Chen, Shing-yi Suen
    Abstract:

    Abstract Anion-exchange membranes with quaternary ammonium groups were prepared by coating a precursor with secondary amino groups (the product of N-[3-(trimethoxysilyl)propyl] ethylene diamine and 3-(triethoxysilyl)propyl isocyanate) on porous glass fiber membranes and further treated with bromoethane. The precursor coating and bromoethane treatment have been proved successful by membrane characterization such as Fourier-transform infrared (FTIR) spectrum, scanning electron microscopy (SEM) photo, contact angle, water content, and ion-exchange capacity. The optimal Feed precursor/dimethyl formamide (DMF) ratio was found as 1:3 (w/w) based on the batch adsorption results of anionic dye Cibacron blue 3GA. The membrane ion-exchange capacity for this condition was 6.8 μmol/cm2 (or 104.2 μmol/cm3) and the maximum dye adsorption capacity was 2.12 mg/cm3. Different desorption Solutions were tested in batch desorption process, and the use of 1N KSCN in 60% methanol attained a better performance (70% desorption). In the chromatography process with two pieces of 47 mm modified anion-exchange membrane discs (loading at 1 mL/min; washing and elution at 8 mL/min), more than 92% of dye molecules could be recovered from a 20 mL Feed Aqueous Solution with an initial dye concentration of 0.05 g/L. Moreover, the membrane performance remained unaltered over 10 successive cycles of dye adsorption, washing, and elution.

  • Adsorptive removal of anionic dye by inorganic–organic hybrid anion-exchange membranes
    Journal of Membrane Science, 2009
    Co-Authors: Hsin-chieh Chiu, Chia-hung Liu, Shiow-ching Chen, Shing-yi Suen
    Abstract:

    Anion-exchange membranes with quaternary ammonium groups were prepared by coating a precursor with secondary amino groups (the product of N-[3-(trimethoxysilyl)propyl] ethylene diamine and 3-(triethoxysjlyl)propyl isocyanate) on porous glass fiber membranes and further treated with bromoethane. The precursor coating and bromoethane treatment have been proved successful by membrane characterization such as Fourier-transform infrared (FTIR) spectrum, scanning electron microscopy (SEM) photo, contact angle, water content, and ion-exchange capacity. The optimal Feed precursor/dimethyl formamide (DMF) ratio was found as 1: 3 (w/w) based on the batch adsorption results of anionic dye Cibacron blue 3GA. The membrane ion-exchange capacity for this condition was 6.8 mu mol/cm(2) (or 104.2 mu mol/cm(3)) and the maximum dye adsorption capacity was 2.12 mg/cm(3). Different desorption Solutions were tested in batch desorption process, and the use of 1 N KSCN in 60% methanol attained a better performance (70% desorption). In the chromatography process with two pieces of 47 mm modified anion-exchange membrane discs (loading at 1 mL/min; washing and elution at 8 mL/min), more than 92% of dye molecules could be recovered from a 20 mL Feed Aqueous Solution with an initial dye concentration of 0.05 g/L. Moreover, the membrane performance remained unaltered over 10 successive cycles of dye adsorption, washing, and elution. (C) 2009 Elsevier B.V. All rights reserved

Eiji Kamio - One of the best experts on this subject based on the ideXlab platform.

  • SEPARATION OF RARE EARTH METALS WITH A POLYMERIC MICROCAPSULE MEMBRANE
    Desalination, 2002
    Co-Authors: Kazuo Kondo, Eiji Kamio
    Abstract:

    In this study, we investigate the mutual separation of lanthanoids by using a column packed with the microcapsules containing acidic organophosphorus compound as an extractant. It is found that adsorption and elution of lanthanoids are briefly achieved by selecting pHs of the Feed Aqueous Solution. The mutual separation of lanthanoids is investigated using the adsorption column connected to the development column containing microcapsules. With selecting pHs of the eluent, each metal is separated mutually in more than 95% of purity. In addition, a numerical Solution of breakthrough curve for an adsorption of rare-earth metal ions is derived.

  • Separation and Concentration of Lanthanoids Using Microcapsules Containing Acidic Organophosphorus Compounds as an Extractant
    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 2002
    Co-Authors: Eiji Kamio, Kazuo Kondo
    Abstract:

    In this study, we measured the extraction equilibria of lanthanoids with microcapsules containing acidic organophosphorus compound as an extractant and discuss their mutual separation by using a column packed with the microcapsules. The extraction equilibria of lanthanoids into the microcapsules containing 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (EHPNA) were elucidated and the extraction equilibrium constants were calculated by slope-analysis method. It was suggested that the lanthanoid ions are extracted in the microcapsules in a high loading state.Furthermore, the adsorption behavior of lanthanoids into the column packed with the microcapsules containing EHPNA was observed. It was found that adsorption and elution of lanthanoids are briefly achieved by selecting pH of the Feed Aqueous Solution. However, it was impossible to separate them only in adsorption or elution operation.So, the mutual separation of lanthanoids was investigated using the adsorption column connected to the development column containing microcapsules. By selecting pH of the eluent, each metal was separated mutually in more than 95% of purity. The metal ions in the eluent from the development column could be concentrated by treating it with a column packed with the microcapsules containing di(2-ethylhexyl)phosphoric acid (D2EHPA).Considering these information, it will be possible to design a continuous extracting, separating and concentrating reactor of lanthanoids using a column packed with the microcapsules.

Congjie Gao - One of the best experts on this subject based on the ideXlab platform.

  • Preparation, structure characteristics and separation properties of thin-film composite polyamide-urethane seawater reverse osmosis membrane
    Journal of Membrane Science, 2008
    Co-Authors: Meihong Liu, Jie Tao, Congjie Gao
    Abstract:

    Abstract A novel thin-film composite (TFC) seawater reverse osmosis membrane was developed by the interfacial polymerization of 5-chloroformyloxyisophthaloyl chloride (CFIC) and metaphenylenediamine (MPD) on the polysulphone supporting membrane. The performance of the TFC membrane was optimized by studying the preparation parameters, which included the reaction time, pH of the Aqueous-MPD Solution, monomer CFIC concentration, additive isopropyl alcohol content in Aqueous Solution, curing temperature and time. The reverse osmosis performance of the resulting membrane was evaluated through permeation experiment with synthetic seawater, and the structure of the novel membrane was characterized by using SEM, AFM and XPS. Furthermore, the separation properties of the TFC membrane were tested by examining the reverse osmosis performances of various conditions, the boron rejection performance and the long-term stability. The results show that the desired TFC seawater reverse osmosis membrane has a typical salt rejection of 99.4% and a flux of about 35 L/m 2  h for a Feed Aqueous Solution containing 3.5 wt.% NaCl at 5.5 MPa, and an attractive boron rejection of more than 92% at natural pH of 7–8; that the novel seawater reverse osmosis membrane appears to comprise a thicker, smoother and less cross-linking film structure. Additionally, the TFC membrane exhibits good long-term stability.

Shiow-ching Chen - One of the best experts on this subject based on the ideXlab platform.

  • Adsorptive removal of anionic dye by inorganic―organic hybrid anion-exchange membranes
    Journal of Membrane Science, 2009
    Co-Authors: Hsin-chieh Chiu, Chia-hung Liu, Shiow-ching Chen, Shing-yi Suen
    Abstract:

    Abstract Anion-exchange membranes with quaternary ammonium groups were prepared by coating a precursor with secondary amino groups (the product of N-[3-(trimethoxysilyl)propyl] ethylene diamine and 3-(triethoxysilyl)propyl isocyanate) on porous glass fiber membranes and further treated with bromoethane. The precursor coating and bromoethane treatment have been proved successful by membrane characterization such as Fourier-transform infrared (FTIR) spectrum, scanning electron microscopy (SEM) photo, contact angle, water content, and ion-exchange capacity. The optimal Feed precursor/dimethyl formamide (DMF) ratio was found as 1:3 (w/w) based on the batch adsorption results of anionic dye Cibacron blue 3GA. The membrane ion-exchange capacity for this condition was 6.8 μmol/cm2 (or 104.2 μmol/cm3) and the maximum dye adsorption capacity was 2.12 mg/cm3. Different desorption Solutions were tested in batch desorption process, and the use of 1N KSCN in 60% methanol attained a better performance (70% desorption). In the chromatography process with two pieces of 47 mm modified anion-exchange membrane discs (loading at 1 mL/min; washing and elution at 8 mL/min), more than 92% of dye molecules could be recovered from a 20 mL Feed Aqueous Solution with an initial dye concentration of 0.05 g/L. Moreover, the membrane performance remained unaltered over 10 successive cycles of dye adsorption, washing, and elution.

  • Adsorptive removal of anionic dye by inorganic–organic hybrid anion-exchange membranes
    Journal of Membrane Science, 2009
    Co-Authors: Hsin-chieh Chiu, Chia-hung Liu, Shiow-ching Chen, Shing-yi Suen
    Abstract:

    Anion-exchange membranes with quaternary ammonium groups were prepared by coating a precursor with secondary amino groups (the product of N-[3-(trimethoxysilyl)propyl] ethylene diamine and 3-(triethoxysjlyl)propyl isocyanate) on porous glass fiber membranes and further treated with bromoethane. The precursor coating and bromoethane treatment have been proved successful by membrane characterization such as Fourier-transform infrared (FTIR) spectrum, scanning electron microscopy (SEM) photo, contact angle, water content, and ion-exchange capacity. The optimal Feed precursor/dimethyl formamide (DMF) ratio was found as 1: 3 (w/w) based on the batch adsorption results of anionic dye Cibacron blue 3GA. The membrane ion-exchange capacity for this condition was 6.8 mu mol/cm(2) (or 104.2 mu mol/cm(3)) and the maximum dye adsorption capacity was 2.12 mg/cm(3). Different desorption Solutions were tested in batch desorption process, and the use of 1 N KSCN in 60% methanol attained a better performance (70% desorption). In the chromatography process with two pieces of 47 mm modified anion-exchange membrane discs (loading at 1 mL/min; washing and elution at 8 mL/min), more than 92% of dye molecules could be recovered from a 20 mL Feed Aqueous Solution with an initial dye concentration of 0.05 g/L. Moreover, the membrane performance remained unaltered over 10 successive cycles of dye adsorption, washing, and elution. (C) 2009 Elsevier B.V. All rights reserved