Synthesis and Characterization of Periodic Mesoporous Organosilicas as Anion Exchange Resins for Perrhenate Adsorption

Langmuir ◽  
2005 ◽  
Vol 21 (12) ◽  
pp. 5372-5376 ◽  
Author(s):  
Byunghwan Lee ◽  
Hee-Jung Im ◽  
Huimin Luo ◽  
Edward W. Hagaman ◽  
Sheng Dai
Keyword(s):  
Anion Exchange ◽  
Synthesis And Characterization ◽  
Periodic Mesoporous Organosilicas ◽  
Anion Exchange Resins ◽  
Mesoporous Organosilicas ◽  
Exchange Resins

Synthesis and Characterization of Organic−Inorganic Hybrid Mesoporous Anion-Exchange Resins for Perrhenate (ReO4-) Anion Adsorption

Langmuir ◽  
2003 ◽  
Vol 19 (10) ◽  
pp. 4246-4252 ◽  
Author(s):  
Byunghwan Lee ◽  
Li−Li Bao ◽  
Hee-Jung Im ◽  
Sheng Dai ◽  
Edward W. Hagaman ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Synthesis And Characterization ◽  
Inorganic Hybrid ◽  
Anion Adsorption ◽  
Anion Exchange Resins ◽  
Exchange Resins

Removal of Hydrophobic and Hydrophilic Constituents by Anion Exchange Resin

1999 ◽  
Vol 40 (9) ◽  
pp. 207-214 ◽  
Author(s):  
J.-P. Croué ◽  
D. Violleau ◽  
C. Bodaire ◽  
B. Legube
Keyword(s):  
Molecular Weight ◽  
Anion Exchange ◽  
Water Source ◽  
Atomic Ratio ◽  
Size Exclusion ◽  
Salting Out ◽  
Anion Exchange Resins ◽  
Hydrophilic Character ◽  
Exchange Resins

The objective of this work was to compare the affinity of well characterized NOM fractions isolated from two surface waters with strong (gel matrix and macroporous matrix) and weak anion exchange resins (AER) using batch experiment conditions. The structural characterization of the fraction of NOM has shown that the higher the hydrophilic character, the lower the C/O atomic ratio, the lower the SUVA, the lower the aromatic carbon content and the lower the molecular weight. In general (not always), strong AER was more efficient to remove DOC than weak AER. For the same water source (Suwannee River), the higher the molecular weight of the NOM fraction, the lower the affinity with AER. Increasing the ionic strength favored the removal of the hydrophobic NOM fraction (“salting out” effect) while increasing the pH apparently reduced the removal of the hydrophilic NOM fraction. Results were discussed in terms of size exclusion, adsorption, anion exchange and also hydrophobic/hydrophilic repulsion.

Synthesis and Characterization of Chiral Periodic Mesoporous Organosilicas

2007 ◽  
Vol 46 (41) ◽  
pp. 7796-7798 ◽  
Author(s):  
Xiangju Meng ◽  
Toshiyuki Yokoi ◽  
Daling Lu ◽  
Takashi Tatsumi
Keyword(s):  
Synthesis And Characterization ◽  
Periodic Mesoporous Organosilicas ◽  
Mesoporous Organosilicas

Synthesis and Characterization of Chiral Periodic Mesoporous Organosilicas

2007 ◽  
Vol 119 (41) ◽  
pp. 7942-7944 ◽  
Author(s):  
Xiangju Meng ◽  
Toshiyuki Yokoi ◽  
Daling Lu ◽  
Takashi Tatsumi
Keyword(s):  
Synthesis And Characterization ◽  
Periodic Mesoporous Organosilicas ◽  
Mesoporous Organosilicas

FTIR spectroscopy in the characterization of the mixture of nuclear grade cation and anion exchange resins

2015 ◽  
Vol 304 (2) ◽  
pp. 917-923 ◽  
Author(s):  
Satinath Ghosh ◽  
Kajal Dhole ◽  
M. K. Tripathy ◽  
Rakesh Kumar ◽  
R. S. Sharma
Keyword(s):  
Ftir Spectroscopy ◽  
Anion Exchange ◽  
Nuclear Grade ◽  
Anion Exchange Resins ◽  
Exchange Resins

scholarly journals Radiotracer Technique in Study of Strongly Basic Anion Exchange Resins Dowex-SBR LC and Indion-454

2013 ◽  
Vol 18 ◽  
pp. 37-49
Author(s):  
P.U. Singare
Keyword(s):  
Ion Exchange ◽  
Exchange Reaction ◽  
Anion Exchange ◽  
Isotopic Exchange ◽  
Ion Exchange Resins ◽  
Anion Exchange Resins ◽  
Isotopic Exchange Reaction ◽  
Bromide Ion ◽  
Exchange Resins

The present paper demonstrates application of isotopic tracer technique in characterization of anion exchange resins Dowex-SBR LC and Indion-454 for which 131I and 82Br radio isotopes were used. The characterization was made based on iodide and bromide ion-isotopic exchange reaction kinetic data obtained for the two resins. It was observed that during iodide ion-isotopic exchange reaction performed at 35.0 °C, 1.000 g of ion exchange resins and 0.002 mol/L labeled iodide ion solution, the values of specific reaction rate (min-1), amount of ion exchanged (mmol), initial rate of ion exchange (mmol/min) and log Kd were 0.379, 0.426, 0.161 and 16.2 respectively for Dowex-SBR LC resin, which was higher than the respective values of 0.156, 0.243, 0.038 and 13.4 as that obtained by using Indion-454 resins. The identical trend was observed for the two resins during bromide ion-isotopic exchange reaction. The results of present investigation also indicate that during the two ion-isotopic exchange reactions, for both the resins, there exists a strong positive linear correlation between amount of ions exchanged and concentration of ionic solution; and strong negative correlation between amount of ions exchanged and temperature of exchanging medium. Based on overall results it appears that under identical experimental conditions, as compared to Indion-454 resins, Dowex-SBR LC resins show superior performance. It is expected here that the present technique can be extended further for characterization of different ion exchange resins which will further help in the selection of those reins for the specific industrial application

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