Liquid-liquid extraction of Nd+3 and Eu+3 from aqueous medium using oxytetracycline in dichloromethane

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shabnam Shahida ◽  
Faisal Hayat ◽  
Akbar Ali ◽  
Muhammad Imran Khan ◽  
Shagufta Zafar ◽  
...  
Keyword(s):  
Sea Water ◽  
Liquid Extraction ◽  
Equilibration Time ◽  
Analysis Method ◽  
Acidic Solutions ◽  
Slope Analysis ◽  
Liquid Liquid Extraction ◽  
Extraction Parameters ◽  
Conjugate Base ◽  
Radiometric Technique

Abstract Liquid-liquid extraction system consisting of oxytetracycline (HOTC) in dichloromethane was developed for extraction of Nd+3 and Eu+3 from acidic solutions using radiometric technique. Various extraction parameters such as pH, equilibration time and metals concentration were optimized. Slope analysis method was used to study the composition of product and was found to be M(OTC)3 [here M=Nd+3 or Eu+3 and OTC = conjugate base of HOTC]. Among cations Al+3 and Fe+3 while among anions F− effected the extraction of these metals. Higher separation factor of these metals was found with many others. The method was successfully applied on spiked sea water.

scholarly journals Extraction and separation of titanium(IV) with D2EHPA and PC-88A from aqueous perchloric acid solutions

2002 ◽  
Vol 67 (7) ◽  
pp. 507-521 ◽  
Author(s):  
Rajeev Singh ◽  
Purshottamm Dhadke
Keyword(s):  
Liquid Extraction ◽  
Acid Solutions ◽  
Extraction And Separation ◽  
Slope Analysis ◽  
Liquid Liquid Extraction ◽  
Quantitative Extraction ◽  
Aqueous Perchloric Acid ◽  
Loaded Organic Phase ◽  
Species Being

The liquid-liquid extraction of Ti(IV) from perchlorate media using di(2-ethylhexyl) phosphoric acid (D2EHPA) and 2-ethylhexyl prosphonic acid mono-2-ethylhexyl ester (PC-88A) in toluene as the extractant was studied Quantitative extraction of Ti(IV) was observed in the lower acidity range of 0.01 to 0.1 mol dm-3 with 0.003 mol dm-3 D2EHPA and 0.01 mol dm-3 PC-88A in toluene, respectively, and in the higher acidity range of 9.0 to 10.0 mol dm-3 with 0.1 mol dm-3 D2EHPA and PC-88A in toluene. Ti(IV) was completely stripped from the metal loaded organic phase of both the extractants with 3%H2O2 in 1M H2SO4 and determined spectrophotometrically. The stoichiometry of the extracted species was determined on the basis of slope analysis. The extraction in the lower acidity range was found to proceed by a cation-exchange mechanism with the extracted species being TiOR2.2HR while in the higher acidity range it was by solvation with the extracted species being Ti(OH)3ClO4.4HR. Separation of Ti(IV) was also carried out from some associated metals like Fe(III), Al(III), V(V), Ce(IV), Mg(II) and Mn(II). The developed methods were extended for the determination of Ti(IV) in real samples like ilmenite, magnetite and red mud in order to show the practical utility of the extractants.

scholarly journals LEVELS OF SOME PRIORITY SUBSTANCES ON ADRIATIC SEA, ALBANIA

2020 ◽  
Author(s):  
Aurel Nuro ◽  
◽  
Bledar Murtaj ◽  
◽  
◽  
...  
Keyword(s):  
Organochlorine Pesticides ◽  
Water Samples ◽  
Adriatic Sea ◽  
Sea Water ◽  
Degradation Products ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction ◽  
Main River ◽  
Catchment Areas ◽  
Almost All

This study evaluated levels for organochlorine pesticides (DDTs, HCHs, Heptachlors, Aldrins and Endosulfanes), their residues, polychlorinated biphenyls (PCB) and poly aromatic hydrocarbons (PAH) in water samples of Adriatic Sea, Albanian part. Water stations were chosen near the main river estuaries of Albania (Vjosa, Semani, Shkumbini, Erzeni, Mati and Buna rivers). These rivers have catchment areas that cover almost all Albania. First, agricultural, industrial and urban waste is transported in these rivers and after that they finished in Adriatic Sea. Water samples were analyzed for a five-year period from February 2015 to December 2019. Liquid-liquid extraction was used to isolate chlorinated pollutants and a florisil column was used for clean-up procedure. Analysis of organochlorine pesticides (according to Method EPA 8081B) and 7 PCB markers was realized using GC/ECD and RTX-5 capillary column. The PAHs were isolated by liquid-liquid extraction technique and after sample concentration qualitative and quantitative analyses were performed by the GC/FID technique. Organochlorine pollutants were detected for all stations of Adriatic Sea because of new arrivals by agricultural and industrial activity in river basins. The highest levels were found near Shkumbini and Semani estuaries due to impact Myzeqeja agricultural area. New arrivals from water irrigation and rainfall influence in found levels. Degradation products of pesticides and volatile PCBs were found at higher levels for all samples analyzed. The levels of some individual organochlorine pesticides were higher than EU and Albanian norms for Semani and Shkumbini rivers. Also, PAHs were found at higher levels for Semani River because of extracting-processing industry in Patos-Marinza area. Monitoring of organic pollutants in water of Adriatic Sea should be continuous because of its importance in fishing, tourism, recreation and Albania economy overall.

scholarly journals Development of a Reliable Analytical Method for Liquid Anion-Exchange Extraction and Separation of Neodymium(III)

2012 ◽  
Vol 2012 ◽  
pp. 1-7
Author(s):  
Balasaheb N. Kokare ◽  
Ganesh S. Kamble ◽  
Balasaheb M. Sargar ◽  
Mansing A. Anuse
Keyword(s):  
Volume Ratio ◽  
Selective Extraction ◽  
Liquid Extraction ◽  
Back Extraction ◽  
Extractant Concentration ◽  
Extraction And Separation ◽  
Slope Analysis ◽  
Liquid Liquid Extraction ◽  
Exchange Extraction ◽  
Reliable Analytical Method

The liquid-liquid extraction of neodymium(III) from succinate media (0.06 M) has been studied at pH 6.0 with the solution of 0.1 M of N-n-octylaniline in xylene when equilibrium is maintained for 5 min. The back-extraction of neodymium(III) has been performed by using 0.1 M HClO4. The effect of various parameters, such as pH, equilibrium time, extractant concentration, stripping agents, organic diluents, and aqueous to organic volume ratio on the extraction of neodymium(III) has been studied. On the basis of slope analysis, the stoichiometry of the extracted species was determined as 1 : 1 : 2[RR′NH2+Nd(succinate)2-](org). The method is free from interference of large number cations and anions. The method was used for the selective extraction of neodymium(III) from its binary mixture with U(VI), Zr(IV), Nb(V), La(III), Th(IV), Ce(IV), and Y(III). The proposed method is selective and was successfully applied to the synthetic mixtures to show the practical utility of the extractant.

scholarly journals N-n-octylaniline as a new reagent for analytical liquid-liquid extraction of yttrium(III) from matrices of various metal ions

2011 ◽  
Vol 30 (2) ◽  
pp. 151
Author(s):  
Balasaheb N. Kokare ◽  
Aniruddha M. Mandhare ◽  
Sanjay S. Kolekar ◽  
Mansing A. Anuse*
Keyword(s):  
Solvent Extraction ◽  
Hydrochloric Acid ◽  
Metal Ion ◽  
Liquid Extraction ◽  
Alizarin Red ◽  
Slope Analysis ◽  
Binary Separation ◽  
Extraction Behavior ◽  
Liquid Liquid Extraction ◽  
Species Being

A systematic study of solvent extraction behavior of yttrium(III) with N-n-octylaniline from salicylate media was carried out. Yttrium(III) was quantitatively extracted from 0.02–0.05 mol dm–3 NaSal at pH 9.7 – 10.5 with 0.17 mol dm–3 N-n-octylaniline in xylene. The extraction was found to proceed by an anion exchange mechanism with the extraction species being [CH3(CH2)7(C6H5)NH2+Y(C7H4O3)2–] ascertained on the basis of slope analysis. The extracted metal ion was separated by selective stripping with hydrochloric acid or perchloric acid from the metal loading organic phase and estimated spectrophotometrically following a complexation with Alizarin Red S. A binary separation of yttrium(III) from Th(IV), U(VI), Zr(IV), Nb(V), La(III), Nd(III), Ce(IV) and Gd(III) is discussed.

Matière organique dissoute dans l'estuaire maritime du St-Laurent — comparaison et choix des méthodes

1974 ◽  
Vol 31 (2) ◽  
pp. 133-139 ◽  
Author(s):  
D. Cauchois ◽  
M. Khalil
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Water Column ◽  
Organic Compounds ◽  
Major Part ◽  
Sea Water ◽  
Liquid Extraction ◽  
Total Organic Matter ◽  
Liquid Liquid Extraction

To study quantitatively and qualitatively the dissolved organic matter in the St. Lawrence maritime estuary, a comparison between the different extracting methods has been undertaken. We propose two of them; one based on liquid–liquid extraction, the second by adsorption on a resin (Amberlite XAD-2). The methods used remove different spectrums of organic compounds from sea water. Hydrocarbons were found to constitute the major part of the extracts varying between 3 and 5 mg/liter. None of the methods used extracts more than 20% of the total organic matter present. The concentration of the organic chloro-compounds in the water column is in the order of 80 ppb.

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