Np(v) complexation with carbonate in aqueous solutions studied by spectrophotometric titration at various temperatures

2016 ◽  
Vol 45 (6) ◽  
pp. 2681-2685 ◽  
Author(s):  
Suliang Yang ◽  
Yaping Zhao ◽  
Guoxin Tian
Keyword(s):  
Aqueous Solutions ◽  
Spectrophotometric Titration ◽  
High Symmetry ◽  
The Third ◽  
Carbonate Complexes

NpO2+ can form carbonate complexes, the first two complexes absorb in the UV/Vis/NIR region but the third is ‘silent’ due to its high symmetry.

scholarly journals Meta-studtite stability in aqueous solutions. Impact of HCO3−, H2O2 and ionizing radiation on dissolution and speciation

2021 ◽  
Author(s):  
Junyi Li ◽  
Zoltán Szabó ◽  
Mats Jonsson
Keyword(s):  
Aqueous Solution ◽  
Ionizing Radiation ◽  
Aqueous Solutions ◽  
Carbonate Complexes ◽  
C Nmr

Four different uranyl-(peroxide)-carbonate complexes were identified during studtite and meta-studtite dissolution in aqueous solution containing 10 mM HCO3− by 13C NMR.

scholarly journals Study of the effectiveness of the third generation polyamideamine and polypropylene imine dendrimers in removal of reactive blue 19 dye from aqueous solutions

2018 ◽  
Vol 5 (4) ◽  
pp. 197-203 ◽  
Author(s):  
Sepideh Sadeghi ◽  
Ghazal Raki ◽  
Asrin Amini ◽  
Nezamaddin Mengelizadeh ◽  
Mohammad Mehdi Amin ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Dye Removal ◽  
Synthetic Wastewater ◽  
Third Generation ◽  
Freundlich Isotherms ◽  
The Third ◽  
Reactive Blue 19 ◽  
Adsorption Data ◽  
Poly Propylene

Background: Dye and colored materials cause health risks in water and therefore, must be removed from water supplies and wastewater. The aim of this study was to evaluate the effectiveness of the third generation poly(amidoamine) (PAMAM) and poly (propylene imine) dendrimers (PPI-G3) in the removal of reactive blue 19 (RB19) dye from aqueous solutions and determine the optimum conditions for the removal. Methods: This study was performed in a laboratory and batch scale. In this study, synthetic wastewater was examined with three different concentrations of RB19 (25, 50, and 100 mg/L), different pHs (3, 7, and 10), various amounts of dendrimer (0.4, 0.8, 1.2, and 1.6 g/L), and at different times (15, 30, and 60 minutes) during the adsorption process. The remaining amount of dye was measured by spectrophotometer at 592 nm wavelength. Langmuir and Freundlich isotherms were also tested. Results: The results showed that by increasing the reaction time and adsorbent dosage, the rate of dye removal increased while by increasing the initial dye concentration and pH, the dye removal efficiency was significantly decreased. In this study, with increase of pH from 3 to 10, dye removal efficiency at a concentration of 25 mg/L, decreased from 72% to 20% and 88% to 17% by PAMAM and PPI dendrimers, respectively. Excel software was used for data analysis. Conclusion: Both adsorbents had a good dye removal efficiency, but PPI dendrimer was more effective in removing RB19. Adsorption data followed the Langmuir isotherm.

scholarly journals IV.—On the Action of Voltaic Electricity on Pyroxylic Spirit, and Solutions in Water, Alcohol, and Ether

1839 ◽  
Vol 14 (1) ◽  
pp. 110-136
Author(s):  
Arthur Connell
Keyword(s):  
Aqueous Solutions ◽  
Royal Society ◽  
The State ◽  
Third Place ◽  
The Third ◽  
General Law ◽  
Electric Action ◽  
Interesting Analogy ◽  
Water Alcohol

The following paper contains a continuation of the experiments on the action of the voltaic pile on alcohol, and some other liquids, of which experiments a considerable number was described to the Royal Society in a former memoir. At present it is intended, in the first place, to shew the perfect analogy between the electric action on pyroxylic spirit, and on alcohol, thereby confirming the interesting analogy already known to exist between these fluids in other respects: in the second place, to adduce a few farther illustrations of secondary voltaic actions in aqueous solutions; in the third place, to examine the nature of the changes produced in alcoholic solutions, under galvanic agency; in the fourth place, to inquire whether electric action does not throw light on the state in which the haloid salts are dissolved by water; and, lastly, to endeavour to suggest as a general law, regulating the electric decomposition of solutions of binary combinations of elementary substances in the principal solvents, that the dissolved body is not directly decomposed, but only the solvent, if itself an electrolyte.

Short-Wavelength Near-Infrared Spectra of Sucrose, Glucose, and Fructose with Respect to Sugar Concentration and Temperature

2003 ◽  
Vol 57 (2) ◽  
pp. 139-145 ◽  
Author(s):  
Mirta Golic ◽  
Kerry Walsh ◽  
Peter Lawson
Keyword(s):  
Aqueous Solutions ◽  
Least Squares ◽  
Infrared Spectra ◽  
Short Wavelength ◽  
Near Infrared ◽  
Deuterium Oxide ◽  
Sugar Concentration ◽  
The Third ◽  
Near Infrared Spectra ◽  
Stretching Vibrations

Short-wavelength near-infrared (SW-NIR) (700–1100 nm) spectra of aqueous solutions of sucrose, d-glucose, and d-fructose were monitored with respect to change in temperature and sugar concentration. Sugar OH and CH related vibrations were identified by analysis of the spectra of sugar solutions in deuterium oxide (D2O), and of sucrose- d8 solutions in D2O. Absorption spectra were explained in terms of the second and third overtones of OH stretching vibrations and the third overtone of CH2 and CH stretchings. In deuterated solutions, CH and CH2 higher overtone vibration bands became apparent. The major spectral effect of decreased temperature or increased sugar concentration was a decrease in absorbance at 960 nm and an increase in absorbance at 984 nm, interpreted as an increase in the degree of H bonding. Partial least-squares (PLS) calibrations on sugar concentrations (with spectra collected at several sample temperatures) relied strongly on the 910 nm sugar CH related bands, whereas calibrations on temperature depended equally on all OH associated vibrations (750, 840, 960, and 985 nm).

Solubility phenomena in science and education: Experiments, thermodynamic analyses, and theoretical aspects

2013 ◽  
Vol 85 (11) ◽  
pp. 2059-2076 ◽  
Author(s):  
Heinz Gamsjäger
Keyword(s):  
Aqueous Solutions ◽  
International Symposium ◽  
Solubility Data ◽  
Data Series ◽  
The Third ◽  
Ionic Solids ◽  
Salt Hydrates ◽  
Science And Education ◽  
Hydrolysis Of

Solubility equilibria between solid salts, salt hydrates, and water play an important role in fundamental and applied branches of chemistry. The continuous interest in this field has been reflected by the 15th International Symposium on Solubility Phenomena as well as by the ongoing IUPAC-NIST Solubility Data Series (SDS), which by now comprises close to 100 volumes. Three typical examples concerning solubility phenomena of ionic solids in aqueous solutions are discussed: (1) sparingly soluble, simple molybdates; (2) sparingly soluble ionic solids with basic anions; and (3) hydrolysis of inert hexa-aqua-M(III) ions, where M is Ir, Rh, or Cr. In the first two cases, essential experimental details are discussed, an outline of thermodynamic analyses is given, and theoretical aspects are emphasized. In the third case, an educational suggestion is made.

Solvent Effects on Acid–Base Equilibria of Propranolol and Atenolol in Aqueous Solutions of Methanol: UV-Spectrophotometric Titration and Theory

2017 ◽  
Vol 46 (3) ◽  
pp. 720-733 ◽  
Author(s):  
Mehran Abbaszadeh Amirdehi ◽  
Mohammad Pousti ◽  
Farnaz Asayesh ◽  
Farrokh Gharib ◽  
Jesse Greener
Keyword(s):  
Aqueous Solutions ◽  
Solvent Effects ◽  
Spectrophotometric Titration ◽  
Acid Base
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