495. Indium phosphates: phase-diagram, ion-exchange, and pH titration studies

1960 ◽  
pp. 2452 ◽  
Author(s):  
C. E. A. Brownlow ◽  
J. E. Salmon ◽  
J. G. L. Wall
Keyword(s):  
Phase Diagram ◽  
Ion Exchange ◽  
Ph Titration

Preparation, ion-exchange, and electrochemical behavior of Cs-type manganese oxides with a novel hexagonal-like morphology

2007 ◽  
Vol 22 (9) ◽  
pp. 2437-2447 ◽  
Author(s):  
Zong-Huai Liu ◽  
Liping Kang ◽  
Mingzhu Zhao ◽  
Kenta Ooi
Keyword(s):  
Ion Exchange ◽  
Alkali Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Manganese Oxides ◽  
Thermal Analyses ◽  
Alkali Metal Ions ◽  
Ph Titration ◽  
High Discharge Capacity ◽  
Treated Sample

Cs-type layered manganese oxide with a novel hexagonal-like morphology (Cs–BirMO) was prepared by a solid-state reaction procedure. The Cs+ extraction and alkali–metal ion insertion reactions were investigated by chemical analyses, x-ray analyses, scanning electron microscopy observation, Fourier transform-infrared spectroscopy, thermogravimetric differential thermal analyses, pH titration, and distribution coefficient (Kd) measurements. A considerable percentage (88%) of Cs+ ions in the interlayer sites were topotactically extracted by acid treatment, accompanied by a slight change of the lattice parameters. Alkali–metal ions could be inserted into the interlayer of the acid-treated sample (H–BirMO), mainly by an ion-exchange mechanism. The pH titration curve of the H–BirMO sample showed a simple monobasic acid toward Li+, Rb+, and Cs+ ions, and dibasic acid behavior toward Na+ and K+ ions. The order of the apparent capacity was K+ > Li+ ≈ Na+ ≈ Rb+ ≈ Cs+ at pH < 6. The Kd study showed the selectivity sequence of K+ > Rb+ > Na+ > Li+ for alkali–metal ions at the range of pH <5; H–BirMO sample showed markedly high selectivity for the adsorption of K+ ions. Preliminary investigations of the electrochemical properties of the Li+-inserted sample Li–BirMO(1M, 6d) showed that the obtained samples had a relatively high discharge capacity of 115 mAh g−1 and excellent layered stability.

Understanding the sorption behaviour of Pu/U on zirconium phosphosilicate prepared by gelation route

2020 ◽  
Vol 108 (6) ◽  
pp. 433-441
Author(s):  
Prashant Patil ◽  
Sachin Pathak ◽  
M. Sharathbabu ◽  
Arijit Sengupta ◽  
R. M. Kadam
Keyword(s):  
Ion Exchange ◽  
Packed Column ◽  
Sorption Process ◽  
Sorption Kinetics ◽  
Infrared Spectrometry ◽  
Ph Titration ◽  
Sorption Behaviour ◽  
Sem Image ◽  
Radiolytic Stability ◽  
Elution Method

AbstractZirconium phosphosilicate (ZPS) has been prepared by gelation route for its ion exchange applications. ZPS was characterised by X-ray diffraction technique (XRD), thermogravimetry (TG), scanning electron microscopy (SEM), Fourier transformed Infrared Spectrometry (FTIR) and surface area analysis. K+ ion exchange behaviour was studied by pH titration. The material was found to extract Pu selectively over U from different mineral acids. Pu sorption behaviour on ZPS packed column was also been carried out. The pore volume was evaluated as 0.1336 mL g−1. The FTIR revealed the presence of –OH and PO43− groups on the surface of the material, while the SEM image indicates the irregular morphology and size of the sorbent. Different isotherm model: Langmuir, Freundlich, Dubinin–Rodushkevich and Temkin were used to understand the nature of sorption, while Lagergren 1st order, Intraparticle diffusion and pseudo 2nd order kinetics were used for modelling sorption kinetics. Suitable elution method was used for quantitative stripping of plutonium from sorbent. The radiolytic stability of the sorbent was evaluated upto 1500 kGy. A comparative evaluation of the sorption process has also been carried out with that reported in literature.

scholarly journals The isolation, identification and synthesis of two metabolites of guanethidine formed in pig and rabbit liver homogenates

1969 ◽  
Vol 113 (1) ◽  
pp. 143-156 ◽  
Author(s):  
F. B. Abramson ◽  
C. I. Furst ◽  
C. McMartin ◽  
Roy Wade
Keyword(s):  
Ion Exchange ◽  
Exchange Chromatography ◽  
Ring Closure ◽  
Antihypertensive Activity ◽  
Pure Compound ◽  
Partial Loss ◽  
Unchanged Drug ◽  
Ph Titration ◽  
Liver Homogenates ◽  
Renal Hypertensive Rat

1. Two metabolites of radioactively labelled guanethidine were isolated from rabbit and pig liver homogenates by ion-exchange chromatography on a sulphonic acid resin. 2. One of the metabolites was eluted from the column with ammonia and identified as 2-(6-carboxyhexylamino)ethylguanidine on the basis of the elemental analysis, i.r. spectrum and pH titration curve of the pure compound, and the observed partial loss of tritium for ring-labelled guanethidine during the formation of this metabolite. 3. This identification was confirmed by synthesis. 4. 2-(6-Carboxyhexylamino)ethylguanidine underwent ring-closure in hot alkaline solution to 1-(6-carboxyhexyl)-2-iminoimidazolidine. 5. The other metabolite of guanethidine was eluted from the ion-exchange column with 6m-hydrochloric acid along with the unchanged drug. It was purified by countercurrent distribution and shown to be identical with synthetic guanethidine N-oxide. 6. The two metabolites and the product of ring-closure had less than one-tenth of the antihypertensive activity of guanethidine in the renal-hypertensive rat and are unlikely to contribute to the pharmacological properties of the drug.

Formation constants of trivalent lanthanide metal ions and hydrazone β-diketones in 75% dioxane – water solvent

1988 ◽  
Vol 66 (9) ◽  
pp. 2362-2366 ◽  
Author(s):  
Basheir A. El-Shetary ◽  
Shaker L. Stefan ◽  
Mohamed S. Abdel-Moez ◽  
Mahmoud M. Mashaly
Keyword(s):  
Rare Earth ◽  
Ion Exchange ◽  
Rare Earths ◽  
Ionization Constant ◽  
Formation Constants ◽  
Organic Ligands ◽  
Ph Titration ◽  
Water Solvent ◽  
Trivalent Lanthanide ◽  
Lanthanide Metal

A new series of hydrazone β-diketone organic ligands were prepared: 3-(2-acetylphenylhydrazone)pentane-2,4-dione (2-APHA), 2-(2-acetylphenylhydrazone)-1-phenyl-1,3-butane dione (2-APHB), 2-(2-acetylphenylhydrazone)-1,3-diphenyl-1,3-propane dione (2-APHDB), 3-(2-acetylphenylhydrazone) 1,1,1-trifluoropentane-2,4-dione (2-APHTA) and 2-(2-acetyl-phenylhydrazone)-5,5-dimethyl-1,3-cyclohexane dione (2-APHDm). The step formation constants of their 1:1 and 1:2 rare-earth complexes were determined at 30 °C by pH titration in 75% (v/v) dioxane–water solvent. The ionization constant of ligands were also measured. A curious odd–even stability differential was apparent in the (2-APHDm) ligand with the heavier rare earths Gd–Lu. The differential was apparent in both log K1 and log β values and may be sufficient to cause reversal of the usual ion-exchange elution sequence.

Synthesis and Characterization of Zirconium-Resorcinol Phosphate; A New Hybrid Cation Exchanger and Dye Adsorbent for Water Treatment

2016 ◽  
Vol 842 ◽  
pp. 196-208 ◽  
Author(s):  
Syeed Zeeshaan Fathima ◽  
Altaf Hussain Pandith
Keyword(s):  
Ion Exchange ◽  
Volume Ratio ◽  
Exchange Capacity ◽  
Adsorption Behavior ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Ph Titration ◽  
Ion Exchange Capacity ◽  
Exchange Material

Synthesis and characterization of a new hybrid ion exchange material Zirconiumresorcinol Phosphate (ZrRP) is reported in this study. Synthetic conditions such as reactant concentrations and mixing volume ratio were varied to optimize the ion exchange properties of this material. The material has Na+ ion exchange capacity equal to 1.7 meq/g (dry). X-ray diffraction spectra suggest that it is amorphous in nature. This ion-exchanger was also characterization by SEM, IR and TGA-DTG. Various studies such as determination of ion exchange capacity, elution behaviour and pH titration has been performed for different metal ions such as K+, Ca2+, Sr2+, Mg2+, Ni2+, Cd2+. This material has potential application for removal of these ions from the aqueous systems. Effect of anionic (SDS) and nonionic (TX-100) surfactants has also been studied on the adsorption behavior of ZrRP. The material has been found to be selective for Mg2+and Cd2+. We also found that the material showed remarkable adsorption behavior towards some dyes like malachite green and methylene blue.

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