scholarly journals Removal of Toxic Metal Ions from Water Using Chelating Terpolymer Resin as a Function of Different Concentration Time and pH

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Mangesh S. Dhore ◽  
Suraj S. Butoliya ◽  
Anil B. Zade
Keyword(s):  
Ion Exchange ◽  
Metal Ions ◽  
Toxic Metal ◽  
Exchange Property ◽  
Aminosalicylic Acid ◽  
Time Intervals ◽  
Physiochemical Properties ◽  
Spectral Techniques ◽  
Wide Ph Range ◽  
Ph Range

Terpolymer resin 4-ASAUF was synthesized by the condensation of 4-aminosalicylic acid (4-ASA) and urea (U) with formaldehyde (F) in the presence of 2 N hydrochloric acid. The structure of the resin was characterized by various spectral techniques like infrared (FTIR) and nuclear magnetic resonance (1H and 13C-NMR) spectroscopy. The empirical formula and empirical weight of the resin were determined by elemental analysis. The physiochemical properties of terpolymer resin were determined. The morphological feature of the 4-ASAUF terpolymer resin was studied by scanning electron microscopy (SEM). The chelating ion-exchange property of this copolymer was studied for eight metal ions, namely, Fe3+, Cu2+, Ni2+, Co2+, Hg2+, Zn2+, Cd2+, and Pb2+ ions by using batch equilibrium method. The chelating ion-exchange study was carried out over a wide pH range at different time intervals using different electrolyte of various ionic strengths.

scholarly journals Ion Exchange Properties of a Terpolymer Resin Derived from 2, 4-Dihydroxybenzaldehyde, Oxamide and Formaldehyde

2009 ◽  
Vol 6 (3) ◽  
pp. 639-650 ◽  
Author(s):  
M. V. Tarase ◽  
W. B. Gurnule ◽  
A. B. Zade
Keyword(s):  
Hydrochloric Acid ◽  
Ion Exchange ◽  
Metal Ions ◽  
Metal Ion ◽  
Polymer Sample ◽  
Equilibrium Method ◽  
Wide Ph Range ◽  
Ph Range ◽  
Exchange Properties

Terpolymer resins (2,4-DHBOF) were synthesized by the condensation of 2,4-dihydroxybenzaldehyde and oxamide with formaldehyde in the presence of hydrochloric acid as catalyst, proved to be selective chelation ion exchange terpolymer resins for certain metals. Chelation ion exchange properties of these polymers were studied for Fe+3, Cu+2, Hg+2, Cd+2, Co+2, Zn+2, Ni+2and Pb+2ions. A batch equilibrium method was employed in the study of the selectivity of the distribution of a given metal ions between the polymer sample and a solution containing the metal ion. The study was carried out over a wide pH range and in a media of various ionic strengths. The polymer showed a higher selectivity for Fe+3, Cd+2and Co+2ions than for Cu+2, Hg+2, Zn+2, Ni+2and Pb+2ions.

A novel fluorescent probe for Hg2+ detection in a wide pH range and its application in living cell imaging

2018 ◽  
Vol 10 (46) ◽  
pp. 5554-5558 ◽  
Author(s):  
Jing Xu ◽  
Honglin Li ◽  
Yanchi Chen ◽  
Bing Yang ◽  
Qingcai Jiao ◽  
...  
Keyword(s):  
Amino Acids ◽  
Metal Ions ◽  
Fluorescent Probe ◽  
Living Cell ◽  
Cell Imaging ◽  
Enhanced Fluorescence ◽  
Wide Ph Range ◽  
Ph Range ◽  
Living Cell Imaging

A novel fluorescent probe (XL-1) exhibited over 50-fold enhanced fluorescence in the presence of Hg2+ and no interference could be produced by other metal ions, anions and amino acids.

scholarly journals Ion Exchange Property of Metal Ions by Chitosan Based Ion-exchanger.

1992 ◽  
Vol 39 (1) ◽  
pp. 8-14
Author(s):  
Junji SHIBATA ◽  
Tadashi TANAKA ◽  
Yoshinari BABA
Keyword(s):  
Ion Exchange ◽  
Metal Ions ◽  
Ion Exchanger ◽  
Exchange Property

scholarly journals Chelation Ion Exchange Properties of 2, 4-Dihydroxyacetophenone-Biuret-Formaldehyde Terpolymer Resin

2009 ◽  
Vol 6 (3) ◽  
pp. 835-843 ◽  
Author(s):  
Sanjiokumar S. Rahangdale ◽  
Anil B. Zade ◽  
Wasudeo B. Gurnule
Keyword(s):  
Hydrochloric Acid ◽  
Ion Exchange ◽  
Metal Ion ◽  
Spectral Studies ◽  
Molar Ratios ◽  
Wide Ph Range ◽  
Metal Ion Uptake ◽  
Uv Visible ◽  
Ph Range ◽  
Exchange Properties

The terpolymer resin 2, 4-HABF has been synthesized by the condensation of 2, 4-dihydroxyacetophenone (2, 4-HA) and biuret (B) with formaldehyde (F) in 1:1:2 molar ratios in presence of 2 M hydrochloric acid as catalyst. UV-Visible, IR and proton NMR spectral studies have been carried out to elucidate the structure of the resin. A terpolymer (2, 4-HABF) proved to be a selective chelating ion exchange polymer for certain metals. Chelating ion-exchange properties of this polymer were studied for Fe3+, Cu2+, Ni2+, Co2+, Zn2+, Cd2+and Pb2+ions. A batch equilibrium method was employed in the study of the selectivity of metal ion uptake involving the measurement of the distribution of a given metal ion between the polymer sample and a solution containing the metal ion. The study was carried out over a wide pH range and in media of various ionic strengths. The polymer showed highest selectivity for Fe3+, Cu2+ions than for Ni2+, Co2+, Zn2+, Cd2+, and Pb2+ions. Study of distribution ratio as a formation of pH indicates that the amount of metal ion taken by resin is increases with the increasing pH of the medium.

scholarly journals pH-Dependent Gelation of a Stiff Anionic Polysaccharide in the Presence of Metal Ions

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 868 ◽  
Author(s):  
Andrey V. Shibaev ◽  
Dmitry A. Muravlev ◽  
Aleksandra K. Muravleva ◽  
Vladimir V. Matveev ◽  
Anatoly E. Chalykh ◽  
...  
Keyword(s):  
Metal Ions ◽  
Freeze Fracture ◽  
Industrial Applications ◽  
Cross Linking ◽  
Chromium Ions ◽  
Transmission Electron ◽  
Wide Range ◽  
Carboxylic Groups ◽  
Wide Ph Range ◽  
Ph Range

Cross-linking of polysaccharides by metal ions provides polymer gels highly required by industrial applications. In this article, we study the rheological properties and microstructure of solutions of a stiff anionic polysaccharide xanthan cross-linked by chromium (III) ions, and we demonstrate that their properties are highly sensitive to the preparation pH. Stable gels are obtained in a wide range of pH from 2.4 to 7.8. The maximum elastic modulus is observed for the gels made at pH 6.3, and by freeze-fracture transmission electron microscopy it is shown that they are characterized by the most dense network structure. However, out of this pH interval, no gelation is observed. At low pH (< 2.4) it is due to high protonation of carboxylic groups of xanthan preventing their interaction with chromium ions, and to the disappearance of oligomeric ions, which are effective in cross-linking. At high pH (> 7.8) the absence of gelation is caused by the transformation of reactive chromium ions into insoluble chromium hydroxide. At the same time, for the gels initially formed at pH 6.3, subsequent change of pH to strongly acidic (1.4) or basic (8.9) medium does not affect appreciably their properties, meaning that chromium cross-links are stable once they are formed. These observations open a reliable route to produce polysaccharide gels with required mechanical properties in a wide pH range where they initially cannot be prepared. It is also shown that the increase of pH to 6.3 of the initially ungelled solution prepared at pH 1.5 results in gelation. This effect offers a facile way for delayed gelation of polysaccharides, which is especially required by oil industry.

scholarly journals Novel nanostructured Fe–Cu–Al trimetal oxide for enhanced antimony(V) removal: synthesis, characterization and performance

2019 ◽  
Vol 79 (10) ◽  
pp. 1995-2004
Author(s):  
Jianyan Wang ◽  
Jing Chen ◽  
Qiumei Li ◽  
Gaosheng Zhang
Keyword(s):  
Toxic Metal ◽  
Point Of Zero Charge ◽  
Precipitation Method ◽  
Hydroxyl Groups ◽  
Adverse Health Effects ◽  
Ion Exchange Reaction ◽  
Wide Ph Range ◽  
And Performance ◽  
Ph Range ◽  
Co Precipitation

Abstract Given the adverse health effects of antimony (Sb), there is an increased focus on developing methods to remove this toxic metal from contaminated water bodies. To effectively remove Sb(V), a new nanostructured Fe–Cu–Al trimetal oxide was fabricated using co-precipitation method at ambient temperature. The Fe–Cu–Al trimetal oxide was very effective at removing Sb(V) from water; it had a maximal adsorption capacity of 169.1 mg/g at pH 7.0, a capacity that was competitive with most other reported adsorbents. The obtained amorphous oxide had a high pH point of zero charge (pHpzc = 8.8) and good adsorption Sb(V) efficiency over a wide pH range (4.0–8.0). Sb(V) uptake was achieved mainly through an ion-exchange reaction between Sb(V) ions and hydroxyl groups on the surface of the oxide. Given its good removal performance, high selectivity, and simple synthesis, this novel Fe–Cu–Al trimetal oxide offers a promising alternate for removing antimony contamination from aquatic environments.

scholarly journals Synthesis, Characterization and Application of a Derivatized Acidic Salt of a Tetravalent Metal. Pyridine Anchored on to Tin(IV) Tungstoselenate

2000 ◽  
Vol 18 (6) ◽  
pp. 551-560
Author(s):  
S.A. Nabi ◽  
A. Islam ◽  
N. Rahman
Keyword(s):  
Ion Exchange ◽  
Metal Ions ◽  
Ion Exchanger ◽  
Inorganic Ion ◽  
Chemical Studies ◽  
Acidic Salt ◽  
Ft Ir ◽  
Exchange Material ◽  
Ph Range ◽  
Dta Studies

The inorgano-organic ion-exchanger, tin(IV) tungstoselenate–pyridine, has been prepared by derivatizing the inorganic ion-exchange material, tin(IV) tungstoselenate, with an organic moiety, pyridine. Chemical studies showed the tin(IV) tungstoselenate/pyridine mole ratio to be 806.5:1, indicating a weak sorption of pyridine on to the surface of the tin(IV) tungstoselenate. The material was characterized on the basis of SEM, FT-IR, TGA and DTA studies. The uptake of Cu2+, Ni2+, Fe2+ and Fe3+ ions was found to be much higher on tin(IV) tungstoselenate–pyridine relative to tin(IV) tungstoselenate. The uptake of these metal ions as a function of loading and pH was also studied when the following affinity order was observed: Cu2+ > Co2+ > Ni2+ > Fe2+ > Fe3+. The uptake of metal ions increased initially with loading but became constant at higher loading. The most favourable pH range was found to be that between 3.5 and 4.5.

scholarly journals Radionuclide 106Ru behavior in aqueous solutions by ion exchange, ultrafiltration, and centrifugation methods

2021 ◽  
Vol 57 (3) ◽  
pp. 331-339
Author(s):  
O. B. Korenkova ◽  
A. V. Radkevich ◽  
N. I. Voronik
Keyword(s):  
Ion Exchange ◽  
Aqueous Solutions ◽  
Waste Treatment ◽  
Membrane Separation ◽  
Liquid Radioactive Waste ◽  
Ionic Species ◽  
Species Formation ◽  
Wide Ph Range ◽  
Ph Range ◽  
Ru Species

The paper presents the results of 106Ru radionuclide behavior regularities study in aqueous solutions in a wide pH range by ultrafiltration, ion exchange and centrifugation methods. The regions of 106Ru various species existence in solution have been established: cationic 106Ru species at pH < 3.5; the transition region of non-ionic species formation in the range of pH 3.5–4.2 and the region of non-ionic species predominant formation at pH > 4.2. A characteristic feature of the studied solutions is the formation of non-ionic particles by microconcentrations of 106Ru via pseudocolloids at lower pH values as compared to ruthenium solutions with a concentration of 10-6–10-4 mol/dm3. The established regularities of the behavior of ruthenium radionuclides can be utilized to increase the efficiency of ion exchange and membrane separation methods at nuclear and radiation facilities for technological solutions and liquid radioactive waste treatment.

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