Transportation and extraction of Cu2+ metal ions from acidic solution by MDLM technique

2022 ◽  
Vol 179 ◽  
pp. 106124
Author(s):  
R. Donat ◽  
M.İ. Eyice ◽  
K.E. Erden
Keyword(s):  
Metal Ions ◽  
Acidic Solution

Platinum(II) and magnesium(II) nucleotide complexes. Synthesis, FT-ir spectra, and structural properties

1983 ◽  
Vol 61 (8) ◽  
pp. 1813-1822 ◽  
Author(s):  
H. A. Tajmir-Riahi ◽  
T. Theophanides
Keyword(s):  
Water Molecule ◽  
Ir Spectra ◽  
Metal Ions ◽  
Structural Properties ◽  
Acidic Solution ◽  
Neutral Solution ◽  
Metal Bonding ◽  
Ft Ir ◽  
Cis And Trans ◽  
Chemical Evidence

Guanosine-5′-monophosphate (5′-GMP) reacts with Pt(II) and Mg(II) metal ions to give complexes of the type Pt(5′-GMP)nCl2•xH2O, cis- and trans-[Pt(NH3)2(5′-GMP)2]Cl2•xH2O and Mg(5'-GMP2)•xH2O, where n = 1, 2, 3, 4 and x = 4–10.Spectroscopic and chemical evidence showed marked similarities with those of the structurally known N7-bonded 5′-GMP complexes of Mn(II), Co(II), Ni(II), Cu(II), and Cd(II) metal ions. Therefore, Pt(II) and Mg(II) are also found to be N7-bonded in these series of nucleotide complexes.The direct phosphate coordination was observed in Mg(II) nucleotide complexes obtained from acidic solution, whereas Mg(II) complexes prepared from neutral solution showed no direct phosphate–Mg(II) interaction. Pt(II) complexes exhibited no direct phosphate metal bonding, while the possibility of an indirect Pt(II)–phosphate interaction through a hydrogen-bonded water molecule can be proposed here.

scholarly journals Molecular Modeling of Acidic Treated PSTM-3T Polymer for Removal of Heavy Metal Ions by Experimental and Computational Studies

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
Natsagdorj Narantsogt ◽  
Gunchin Burmaa ◽  
Adiya Perlee-Oidov ◽  
Nyamdorj Shurkhuu ◽  
Namsrai Javkhlantugs
Keyword(s):  
Molecular Structure ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Density Functional ◽  
Acidic Solution ◽  
Ph Value ◽  
Density Functional Theory Method ◽  
Structure Change ◽  
Sorption Efficiency

The synthesized poly[N,N′-bis(3-silsesquioxanilpropyl)-thiocarbamide] (PSTM-3T) was used and the surface morphology and microstructure of it were analyzed by scanning electron microscopy with energy dispersive spectrometer (SEM/EDS). The molecular structure change of the PSTM-3T polymer of the PSTM-3T after treatment by acidic solution with different pHs was revealed using FT-IR experiments andab initiocalculations with density functional theory method. The sorption efficiency of the heavy metal ions depends on the molecular structure change of PSTM-3T after treatment of different pH aqueous solutions. After the treatment of acidic solution (pH = 2) of PSTM-3T, the polymer formed the tautomer state to increase the sorption efficiency for chromate ion. For the increment of pH value for acidic solution, the PSTM-3T polymer was dissociated to increase the sorption efficiency for copper ion.

scholarly journals Extraction and separation studies of Ga(III), In(III) and Tl(III) using the neutral organophosphorous extractant, Cyanex-923

2003 ◽  
Vol 68 (7) ◽  
pp. 581-591 ◽  
Author(s):  
S.D. Pawar ◽  
P.M. Dhadke
Keyword(s):  
Metal Ions ◽  
Organic Phase ◽  
Acidic Solution ◽  
Sequential Procedure ◽  
Analysis Method ◽  
Effect Of Ph ◽  
Extraction And Separation ◽  
Slope Analysis ◽  
Cyanex 923 ◽  
Ph Range

The neutral extractant, Cyanes-923 has been used for the extraction and separation of gallium(III), indium(III) and thallium(III) from acidic solution. These metal ions were found to be quantitatively extracted with Cyanex-923 in toluene in the pH range 4.5?5.5, 5.0?6.5 and 1.5?3.0 respectively, and from the organic phase they can be stripped with 2.0 mol dm-3 HNO3, 3.0 mol dm-3 HNO3 and 3.0 mol dm-3 HCl, respectively. The effect of pH equilibration period, diluents, diverse ions and stripping agents on the extraction of Ga(III), In(III) and Tl(III) has been studied. The stroichiometry of the extracted species of these metal ions was determined on the basis of the slope analysis method. The reaction proceed by solvation and the probable extracted species found were [MCl3. 3Cyanex-923]?[where M = Ga(III) or In(III)]?and [HTlCl4. 3Cyanex-923]. Based on these results a sequential procedure for the separation of Ga(III), In(III) and Tl(III) from each other was developed.

Metal complexes of 1,10-phenanthroline derivatives. I. Bis complexes of 2-Carboxy-1,10-phenanthroline with first row transition metal ions

1967 ◽  
Vol 20 (2) ◽  
pp. 217 ◽  
Author(s):  
HA Goodwin ◽  
RN Sylva
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Complexes ◽  
Temperature Dependence ◽  
Spectral Properties ◽  
Acidic Solution ◽  
Chelating Agent ◽  
Transition Metal Ions

2-Carboxy-1,10-phenanthroline has been prepared by brominating 2- methyl-phenanthroline and then hydrolysing in acidic solution the resultant 2-tribromomethyl derivative. The acid acts as a tridentate chelating agent and six-coordinate inner complexes of manganese(II), iron(II), cobalt(II), nickel(II), copper(II), and zinc(II) as well as a complex of iron(III) are described. The formulation of the complexes as six-coordinate is supported by their magnetic and spectral properties. The temperature dependence of the magnetism of the iron(II) complex indicates that the complex is a simple paramagnetic.

scholarly journals Fabrication of A novel polyvinylpyrrolidone/abeitic acid hydrogel by gamma irradiation for the recovery of Zn, Co, Mn and Ni from aqueous acidic solution

2021 ◽  
Author(s):  
Botros A. Masry ◽  
Mohamed A. Elhady ◽  
Issa M. Mousaa
Keyword(s):  
Heavy Metals ◽  
Radiation Dose ◽  
Metal Ions ◽  
Gamma Irradiation ◽  
Acidic Solution ◽  
Batch Process ◽  
Maximum Adsorption Capacity ◽  
Nuclear Facilities ◽  
Aqueous Acidic Solution ◽  
Living Organisms

Abstract As heavy metals are a group of pollutants that originate from industrial and nuclear facilities has become of major concern in the aquatic environment due to their toxicity to all living organisms. In this context; this study was aimed to prepare sustainable and efficient hydrogel for the removal of heavy metals such as Co, Ni, Zn and Mn from aqueous acidic solution. The polyvinylpyrrolidone (PVP)/abietic acid (AA) hydrogel were prepared by gamma irradiation at 50 kGy. The characterization of PVP/AA hydrogel were investigated by water absorbancy, gel content, scanning electron microscopy, X-ray diffraction (XRD) and Fourier transform infrared (FTIR). The characterizations indicate that bio-sorbent composite hydrogel networks provide advantageous over conventional preparation techniques. PVP/AA hydrogel was implanted for batch process with studying the effect different parameters on the sorption of the investigated metal ions such as radiation dose; pH, contact time, metal ions, V/m and temperature. The results illustrate that the highest uptake% was obtained at radiation dose 30 kGy at optimum pH = 3. The maximum adsorption capacity of PVP-AA adsorbent was reached 32, 32.5,19 and 32.5 mg.g− 1 for Zn(II), Co(III), Ni (III) and Mn(II) ions respectively. The changes in the values of free energy (ΔG) and enthalpy (ΔH) confirm the spontaneous nature of the adsorption reaction with an endothermic process. The maximum desorption of the investigated metal ions was achieved with 1 M HNO3 of (97%, 98%, 70% and 60%) and takes the order: Co > Ni > Zn > Mn. The highest separation factor for Zn/Co = 26 and Zn/Ni = 8.6 at pH = 0.75.

HREM Study of electron-induced surface radiation damage in ReO3

1991 ◽  
Vol 49 ◽  
pp. 636-637
Author(s):  
R. Ai ◽  
H.-J. Fan ◽  
L. D. Marks
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Oxides ◽  
Electron Irradiation ◽  
Transition Metal Oxides ◽  
Carbon Film ◽  
Transition Metal Ions ◽  
Surface Radiation ◽  
Valence Transition ◽  
Electron Microscopes

It has been known for a long time that electron irradiation induces damage in maximal valence transition metal oxides such as TiO2, V2O5, and WO3, of which transition metal ions have an empty d-shell. This type of damage is excited by electronic transition and can be explained by the Knoteck-Feibelman mechanism (K-F mechanism). Although the K-F mechanism predicts that no damage should occur in transition metal oxides of which the transition metal ions have a partially filled d-shell, namely submaximal valence transition metal oxides, our recent study on ReO3 shows that submaximal valence transition metal oxides undergo damage during electron irradiation.ReO3 has a nearly cubic structure and contains a single unit in its cell: a = 3.73 Å, and α = 89°34'. TEM specimens were prepared by depositing dry powders onto a holey carbon film supported on a copper grid. Specimens were examined in Hitachi H-9000 and UHV H-9000 electron microscopes both operated at 300 keV accelerating voltage. The electron beam flux was maintained at about 10 A/cm2 during the observation.

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