Heavy-metal extraction capability of chalcogenoic aminophosphines derived from 1-amino-4-methylpiperazine

2013 ◽  
Vol 67 (10) ◽  
Author(s):  
Özlem Sarıöz ◽  
Yavuz Sürme ◽  
Vefa Muradoğlu
Keyword(s):  
Heavy Metal ◽  
Solvent Extraction ◽  
Metal Ions ◽  
Aqueous Phase ◽  
Organic Phase ◽  
Metal Extraction ◽  
Ph Values ◽  
Metal Picrate ◽  
Picrate Extraction ◽  
Complexation Equilibrium

AbstractAminophosphine of the type (Ph2PNHR) derived from 1-amino-4-methylpiperazine and its chalcogen derivatives (Ph2P(X)NHR X = S, Se) were used as ligands in solvent extraction of metal picrates such as Cu2+, Ni2+, and Pb2+ from the aqueous to the organic phase. Influence of parameters such as pH of the aqueous phase, ligand concentration in the organic phase, and concentration of the extractant extracted from the aqueous to the organic phase was investigated to determine the ligands’ ability to extract metal ions. Metal picrate extraction was investigated at 25°C using UV-VIS spectrophotometry in dichloromethane in the absence and in the presence of Ph2PNHR and chalcogenides. The extraction results revealed that the extraction percentage of Cu2+, Ni2+, and Pb2+ metals was much higher at lower pH values, indicating an acidity dependent complexation equilibrium.

Solvent extraction of uranium(VI) and thorium(IV) from nitrate media by Cyanex 923

2000 ◽  
Vol 88 (1) ◽  
Author(s):  
S.K. Sahu ◽  
M.L.P. Reddy ◽  
T.R. Ramamohan ◽  
V. Chakravortty
Keyword(s):  
Solvent Extraction ◽  
Metal Ions ◽  
Aqueous Phase ◽  
Organic Phase ◽  
Metal Ion ◽  
Theoretical Methods ◽  
Extraction Behaviour ◽  
Cyanex 923 ◽  
Inorganic Ligands ◽  
Nitrate Solutions

The extraction behaviour of uranium(VI) and thorium(IV) from nitrate solutions has been investigated using Cyanex 923 (TRPO) in xylene as an extractant. The extraction data have been analyzed by both graphical and theoretical methods by taking into account complexation of the metal ion in the aqueous phase with inorganic ligands and all plausible complexes extracted into the organic phase. The results demonstrate that these metal ions are extracted into xylene as Th(NO

Solvent extraction-microdroplet x-ray fluorescence analyses of trace amounts of heavy metal ions

1984 ◽  
Vol 13 (2) ◽  
pp. 83-86 ◽  
Author(s):  
Michihiro Murata ◽  
Masayuki Omatsu ◽  
Syuji Mushimoto
Keyword(s):  
Heavy Metal ◽  
Solvent Extraction ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
X Ray

SEPARATION OF P t (IV), P d (II) AND R h (III) FROM CHLORIDE SOLUTIONS BY MULTISTAGE SOLVENT EXTRACTION USING NITROGEN-CONTAINING EXTRACTANTS

2019 ◽  
Vol 85 (4) ◽  
pp. 5-10
Author(s):  
Irina S. Rudik ◽  
Olesya N. Katasonova ◽  
Olga B. Mokhodoeva ◽  
Tatyana A. Maryutina ◽  
Boris Ya. Spivakov ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Organic Phase ◽  
Platinum Group Metals ◽  
Metal Extraction ◽  
Platinum Metals ◽  
Chloride Solutions ◽  
Water Fraction ◽  
Quantitative Extraction ◽  
Rotating Coiled Columns ◽  
Platinum Group

The possibility of Pd (II), Pt (IV), and Rh (III) separation from chloride solutions by solvent extraction in rotating coiled columns (RCC) is demonstrated. The reagents most frequently used in extraction of platinum metals were selected as extractants: trioctylamine (TOA), methyltrialkylammonium chloride (MTAA), tributylphosphate (TBP), N, N, N',N'-tetra-re-octyldiglyTOlamide (TODGA). The completeness of extraction of the platinum group metals from individual and mixed hydrochloric acidic and chloride solutions was studied depending on the nature and concentration of the extractant, acidity of the test solutions and other factors. Optimal conditions for the quantitative extraction of metals from model hydrochloric acidic and chloride solutions and subsequent selective separation at the stripping stage are specified. A scheme of multistaged extraction separation of Pd (II), Pt (IV), and Rh (III) from chloride solutions using a 0.05 M solution of MTAA in toluene as a stationary phase in RCC is proposed. The scheme includes extraction of Pd (II) and Pt (IV) ions from a chloride solution (0, 1 M HCl + 30 g/liter NT) into the organic phase with simultaneous separation of Rh(III) remaining in the aqueous phase, and sequential stripping of Pd (II) and Pt (IV) from the organic phase with a 0.01 M solution of thiourea in 0.1 M HCl and a 1 M solution of thiourea in 0.5 M HCl, respectively. The scheme was tested in separation of the platinum group metals from the technological solution of a given composition. The degree of metal extraction with a 0.05 M MTAA solution in toluene and sequential stripping with thiourea solutions is 99.5% for Rh (III), 99.9% for Pd (II), and 97.4% for Pt (IV). The separated water fractions of rhodium and platinum after leaving the column did not contain impurities of other platinum metals whereas the water fraction of palladium contained 0.5% Pt.

scholarly journals Solvent extraction of heavy metal ions like mercury(II) ion by hexadecylphthalamic acid.

1986 ◽  
pp. 1799-1802
Author(s):  
Jun NISHIMURA ◽  
Nagatoshi KOBAYASHI ◽  
Yoshikazu MIYAKE ◽  
Masaaki TERAMOTO ◽  
Akira OKU
Keyword(s):  
Heavy Metal ◽  
Solvent Extraction ◽  
Metal Ions ◽  
Heavy Metal Ions

scholarly journals Experimental study of phase entrainment in copper solvent extraction

DYNA ◽  
2020 ◽  
Vol 87 (213) ◽  
pp. 85-90
Author(s):  
Patricio Navarro Donoso ◽  
Cristian Vargas Riquelme ◽  
Jonathan Castillo ◽  
Rossana Sepúlveda
Keyword(s):  
Experimental Study ◽  
Solvent Extraction ◽  
Aqueous Phase ◽  
Organic Phase ◽  
Copper Concentration ◽  
Mixing Time ◽  
Phase 1 ◽  
Initial Ph ◽  
Copper Solvent Extraction ◽  
Displacement Speed

The entrainment of the organic phase in the aqueous applied to typical solutions in a solvent extraction of copper process was studied. The organic phase used is composed of the commercial extractant LIX 984-N diluted in Shellsol 2046 AR. The aqueous phase contains 6 g/L of Cu2+, at pH 2  and 20 ºC. The variables studied were: mixing speed of 400 to 1000 rpm; mixing time of 3 to 30 minutes; initial pH of the electrolyte 2, 3, and 4; percentage of extractant in the organic phase 10 to 30% v/v; and copper concentration in the aqueous phase 1 to 6 g/L. It was determined that the entrainment of the organic phase in the aqueous is determined by the physical properties of the phases in equilibrium and by the system’s hydrodynamics, and it is a phenomenon that involves the advancing speed of the interphase (or dispersion band) and the displacement speed of the organic drops.

scholarly journals Extraction and separation of U(VI) and Th(IV) from hydrobromic acid media using Cyanex-923 extractant

2010 ◽  
Vol 75 (11) ◽  
pp. 1549-1557 ◽  
Author(s):  
Snehal Ghag ◽  
Suresh Pawar
Keyword(s):  
Solvent Extraction ◽  
Metal Ions ◽  
Organic Phase ◽  
Phosphine Oxide ◽  
Hydrobromic Acid ◽  
Analysis Method ◽  
Acid Media ◽  
Extraction And Separation ◽  
Slope Analysis ◽  
Cyanex 923

A systematic study of the solvent extraction of uranium(VI) and thorium(IV) from hydrobromic acid media was performed using the neutral phosphine oxide extractant Cyanex-923 in toluene. These metal ions were found to be quantitatively extracted with Cyanex-923 in toluene in the acidity range 5x10-5-1x10-4 M and 5x10-5-5x10-3 M, respectively, and they are stripped from the organic phase with 7.0 M HClO4 and 2.0- 4.0 M HCl, respectively. The effect of the equilibrium period, diluents, diverse ions and stripping agent on the extraction of U(VI) and Th(IV) was studied. The stoichiometry of the extracted species of these metal ions was determined based on the slope analysis method. The extraction reactions proceed by solvation and their probable extracted species found in the organic phase were UO2Br2?2Cyanex-923 and ThBr4?2Cyanex-923. Based on these results, a sequential procedure for their separation from each other was developed.

Dodecyl sulfate chain-anchored mercerized lignocellulose agro-waste: An effective and sustainable adsorbent to sequester heavy metal ions from an aqueous phase

2017 ◽  
Vol 36 (6) ◽  
pp. 1676-1684 ◽  
Author(s):  
Moonis Ali Khan ◽  
Mohd Sajid Ali ◽  
Zeid Abdullah Alothman ◽  
Masoom Raza Siddiqui ◽  
Hamad A. Al-Lohedan
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Aqueous Phase ◽  
Heavy Metal Ions ◽  
Dodecyl Sulfate
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