Preparation of Cation Exchanger Using Electrospun Polystyrene Nanofiber

2006 ◽  
Vol 10 (2) ◽  
pp. 196-200 ◽  
Author(s):  
Hyung-Hwan An ◽  
◽  
Changyun Shin ◽  
Keyword(s):  
Ion Exchange ◽  
Glass Fiber ◽  
Water Uptake ◽  
Cation Exchanger ◽  
Fiber Surface ◽  
High Water ◽  
Exchange Capacity ◽  
Experimental Results ◽  
Ion Exchanger ◽  
Ion Exchange Capacity

We studied a new ion exchanger for high ion exchange capacity (IEC) and rapid ion exchange. Polystyrene nanofiber ion exchangers (PSNIEs) were prepared by electrospinning from solutions of dissolved polystyrene followed by sulfonation. Coating and sulfonation were used to modify the glass fiber surface with polystyrene to produce cation exchanger fiber (CEF). We present new experimental results on the performance of PSNIE and CEF related to parameters of IEC, water uptake, and surface morpoholgy. IEC and water uptake of PSNIE depend on sulfonation time. IEC reached 3.74 mmol/g at relatively high water uptake of 0.6 to 0.77g H2O/g-dry-PNIE. IEC and water uptake of CEF reached 3.61mmol/g-CEF and 0.25g H2O/g-dry-CEF.

scholarly journals A New Hybrid EDTA–Zirconium Phosphate Cation-Exchanger: Synthesis, Characterization and Adsorption Behaviour for Environmental Monitoring

2009 ◽  
Vol 27 (4) ◽  
pp. 423-434 ◽  
Author(s):  
S.A. Nabi ◽  
Mu. Naushad ◽  
Rani Bushra
Keyword(s):  
Ion Exchange ◽  
Zirconium Phosphate ◽  
Cation Exchanger ◽  
Exchange Capacity ◽  
Ion Exchanger ◽  
Ion Exchange Capacity ◽  
Inorganic Ion ◽  
Ft Ir ◽  
Distribution Studies ◽  
Binary Separations

EDTA–zirconium phosphate has been synthesized as a new amorphous hybrid cation-exchanger by the combination of the inorganic ion-exchanger zirconium phosphate and EDTA, thereby providing a new class of organic–inorganic hybrid ion-exchanger with better mechanical and granular properties, a good ion-exchange capacity (2.40 mequiv/g dry exchanger for Na+), good reproducibility, and a higher stability and selectivity towards heavy metal ions. It has been characterized using FT-IR, TGA/DTA, X-ray and SEM methods, in addition to ion-exchange studies such as the determination of its ion-exchange capacity, elution and distribution behaviour, to provide a better understanding of the ion-exchange behaviour of the material. On the basis of distribution studies, the material was found to be highly selective towards Th(IV) and its selectivity was examined by achieving some important binary separations such as Cd(II)–Th(IV), Ni(II)–Th(IV), Hg(II)–Th(IV), Zn(II)–Th(IV), Pb(II)–Th(IV) and Al(III)–Th(IV) by column means, indicating its utility in environmental pollution control in one way or other.

scholarly journals Assessment of Novel Synthetized Nanozirconium Tungstovanadate as Cation Exchanger for Lead Ion Decontamination

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
M. F. Elkady ◽  
E. M. El-Sayed ◽  
H. A. Farag ◽  
A. A. Zaatout
Keyword(s):  
Ion Exchange ◽  
Cation Exchanger ◽  
Exchange Capacity ◽  
Molar Ratio ◽  
Lead Ion ◽  
Isotherm Models ◽  
Preparation Technique ◽  
Lead Uptake ◽  
Ion Exchange Capacity ◽  
Ion Sorption

A novel nanozirconium tungstovanadate that was assigned as a cation exchanger was synthetized using sol-gel preparation technique. The response of synthesis parameter variation on the properties of the produced ion exchanger was elucidated. The reactant molar ratio, gelation temperature, and HCl concentration have been optimized to attain cation exchanger with high ion exchange capacity and lead ion sorption. The most proper prepared sample has been chemically and physically characterized using different techniques. The ion exchange capacity of this sample was 2.5 meq/g and it recoded 96% lead ion sorption. The effects of the different processing parameters that affect lead sorption process have been investigated by a single factor method. Langmuir and Freundlich isotherm models were applied to the experimental data to examine the lead uptake mechanism.

A Study of Lead Sorption by a Cellulose-Based Chelating Ion Exchanger Ostsorb Dtta

1994 ◽  
Vol 59 (1) ◽  
pp. 106-118 ◽  
Author(s):  
Ladislav Svoboda ◽  
Jaroslav Chutný ◽  
Miloslav Tomek
Keyword(s):  
Ion Exchange ◽  
Aqueous Medium ◽  
Mechanical Stability ◽  
High Water ◽  
Exchange Capacity ◽  
Ion Exchanger ◽  
High Water Content ◽  
Experimental Conditions ◽  
Complexing Properties ◽  
Kinetics Of

Complexing properties of the chelating ion exchanger based on spherical cellulose modified by the functional groups of diethylenetriaminetetraacetic acid, Ostsorb DTTA, have been studied in the sorption of lead from aqueous medium at various experimental conditions, such as pH, the dynamic or static arrangement of experiment, the presence of other compounds, the concentration of the ion being sorbed, the form of ion exchanger etc. The results have been compared with the data found with the known selective ion exchanger Dowex A-1. Ostsorb DTTA exhibits good kinetics of the ion exchange at the exchange capacity of 210 mg Pb g-1 for pH 6. For some applications, its lower mechanical stability and high water content in the swollen particles may be unfavourable.

Preparation of Highly Stable Ion Exchange Membranes by Radiation-Induced Graft Copolymerization of Styrene and Bis(vinyl phenyl)ethane Into Crosslinked Polytetrafluoroethylene Films

2006 ◽  
Vol 4 (1) ◽  
pp. 56-64 ◽  
Author(s):  
Tetsuya Yamaki ◽  
Junichi Tsukada ◽  
Masaharu Asano ◽  
Ryoichi Katakai ◽  
Masaru Yoshida
Keyword(s):  
Ion Exchange ◽  
Proton Conductivity ◽  
Water Uptake ◽  
Graft Copolymerization ◽  
Exchange Capacity ◽  
Polymer Electrolyte Fuel Cells ◽  
Ion Exchange Membranes ◽  
Aromatic Rings ◽  
Ion Exchange Capacity ◽  
Radiation Induced

We prepared novel ion exchange membranes for possible use in polymer electrolyte fuel cells (PEFCs) by the radiation-induced graft copolymerization of styrene and new crosslinker bis(vinyl phenyl)ethane (BVPE) into crosslinked polytetrafluoroethylene (cPTFE) films and subsequent sulfonation and then investigated their water uptake, proton conductivity, and stability in an oxidizing environment. In contrast to the conventional crosslinker, divinylbenzene (DVB), the degree of grafting of styrene∕BVPE increased in spite of high crosslinker concentrations in the reacting solution (up to 70mol%). Quantitative sulfonation of the aromatic rings in the crosslinked graft chains resulted in the preparation of membranes with a high ion exchange capacity that reached 2.9meq∕g. The bulk properties of the membranes were found to exceed those of Nafion membranes except for chemical stability. The emphasis was on the fact that the BVPE-crosslinked membranes exhibited the higher stability in the H2O2 solution at 60°C compared to the noncrosslinked and DVB-crosslinked ones, as well as decreased water uptake and reasonable proton conductivity. These results are rationalized by considering the reactivity between styrene and the crosslinker, which is an important factor determining the distribution of the crosslinks in the graft component. In the case of BVPE, the crosslinks at a high density were homogeneously incorporated even into the interior of the membrane because of its compatibility with styrene while the far too reactive DVB led to a crosslink formation only near the surface. The combination of both the cPTFE main chain and BVPE-based grafts, i.e., a perfect “double” crosslinking structure, is likely to effectively improve the membrane performances for PEFC applications.

The Synthesis and Ion-Exchange Property of Li+ Memorized Spinel LiZnPO4

2012 ◽  
Vol 424-425 ◽  
pp. 789-792
Author(s):  
Heng Li
Keyword(s):  
Solid State ◽  
Ion Exchange ◽  
Solid State Reaction ◽  
Exchange Capacity ◽  
Experimental Results ◽  
Exchange Mechanism ◽  
Exchange Property ◽  
Spinel Type ◽  
Ion Exchange Capacity ◽  
Crystallization Method

Compound [LiZnPO4], a spinel-type metal compound, was prepared by a solid state reaction crystallization method. The experimental results showed that the Li+extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of 4.1 mmol/g for Li+.

Using Ion Exchange Capacity to Control Water Uptake in Electrodes of Low-Temperature Anion Exchange Membrane Electrolyzers

2020 ◽  
Vol MA2020-02 (38) ◽  
pp. 2442-2442
Author(s):  
Garrett Huang ◽  
Mrinmay Mandal ◽  
Alexandra Dobbs ◽  
Katelyn Groenhout ◽  
Paul A Kohl
Keyword(s):  
Low Temperature ◽  
Ion Exchange ◽  
Anion Exchange ◽  
Water Uptake ◽  
Exchange Capacity ◽  
Anion Exchange Membrane ◽  
Ion Exchange Capacity ◽  
Exchange Membrane ◽  
Control Water

Synthesis and physiochemical performances of PVC-sodium polyacrylate and PVC-sodium polyacrylate-graphite composite polymer membrane

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Abdul Hamid ◽  
Muhammad Khan ◽  
Fakhar Hussain ◽  
Amir Zada ◽  
Tiehu Li ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Water Uptake ◽  
Composite Membranes ◽  
Type A ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Polymeric Membranes ◽  
Sodium Polyacrylate ◽  
Ion Exchange Capacity ◽  
Graphite Composite

Abstract Three types (type-A, B, and C) of composite polymeric membranes (CPMs) based on poly vinyl chloride (PVC) and different fillers (sodium polyacrylate and sodium polyacrylate-graphite) soaked in water and 0.5 N HCl were prepared using solvent casting method. Different physicochemical parameters such as microscopic surface study, water uptake, perpendicular swelling, density, porosity (ε), ion exchange capacity, and conductivity of the as the prepared CPMs were evaluated. Interestingly, type-A CPM cast with filler-A has greater values of the above parameters except density and ionic conductivity than those of type-B and C CPMs. The water uptake of type-A, B and C composite membranes was respectively in the range of 220.42–534.70, 59.64–41.65, and 15.94–2.62%. Ion exchange capacity of type-A, B and C CPMs was in the range of 3.669 × 107–2.156 × 107, 5.948 × 107–1.258 × 107, and 1.454 × 107–1.201 × 107 m.eq.g−1 respectively while the conductivity order was type-A < B < C. These types of CPMs may be helpful in many applications including proton exchange membranes, fuel cell like devices, as sensors for different metals, gas purification, water treatment, and battery separators.

scholarly journals CHARACTERIZATION OF SULFONATED POLYSULFONE/BENTONITE HYBRID MEMBRANES

2014 ◽  
Vol 13 (1) ◽  
pp. 7
Author(s):  
Bambang Piluharto ◽  
Imam Syafi’i ◽  
R. Indahsari ◽  
Tanti Haryati
Keyword(s):  
Ion Exchange ◽  
Water Uptake ◽  
Mechanical Stability ◽  
Group Analysis ◽  
Exchange Capacity ◽  
Polysulfone Membrane ◽  
Ion Exchange Capacity ◽  
Fuel Cell Application ◽  
Sulfonated Polysulfone ◽  
Functional Group Analysis

Sulfonated polysulfone membrane is one of the alternative membranes as replacing Nafion membrane for the fuel cell application. This membrane was prepared by introducing sulfonic group in the polysulfone structure backbone, so that provides the ionic membrane. However, more ionic groups in the SPSF membrane lead to loss mechanical stability. This study aims to prepare the hybrid membrane from SPSF and bentonite. In here, various of bentonite concentrations were used as variable to study water uptake and ion-exchange capacity properties. As the results, increasing bentonite concentrations lead to increase water uptake and ion-exchange capacity. By the functional group analysis, proved that adding bentonite in SPSF did not change structure of SPSF, means that interaction between SPSF and bentonite were physical interactions.

Synthesis and characterization of a new crystalline tin(IV) arsenophosphate ion exchanger

1990 ◽  
Vol 68 (2) ◽  
pp. 346-349 ◽  
Author(s):  
K. V. Surendra Nath ◽  
S. N. Tandon
Keyword(s):  
Ion Exchange ◽  
Cation Exchanger ◽  
Exchange Capacity ◽  
Ion Exchanger ◽  
Amorphous Precursor ◽  
X Ray ◽  
Inorganic Ion Exchanger ◽  
Inorganic Ion ◽  
Exchange Behaviour

A new crystalline layered inorganic ion exchanger tin(IV) arsenophosphate with the formula Sn(HAsO4)(HPO4)•H2O has been prepared by refluxing the amorphous precursor. This exchanger has been characterized by X-ray powder pattern, chemical analysis, IR spectra, and thermal dehydration. Its ion exchange behaviour towards sodium ions is reported. The exchanger has an exchange capacity of 5.36 mequiv./g for Na+. The performance of tin(IV) arsenophosphate is compared with crystalline tin(IV) phosphate and arsenate. Keywords: cation exchanger, crystalline tin(IV) arsenophosphate, ion exchange, thermal behaviour, X-ray studies.

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