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Extraction
Items for "Extraction"
Recovery of fission palladium by electrodeposition using room temperature ionic liquids
Room temperature molten salts for possible application of recovery of fission palladium from irradiated nuclear fuel/wastes have been investigated...
Keywords: Room temperature ionic liquids, Recovery of palladium, Cyclic voltammetry, Electrorefining, Extraction
03/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagSynergistic extraction of Nd(III), Tb(III) and Lu(III) ions with a mixture of picrolonic acid and benzo-15-crown-5 in chloroform
The synergistic mixture comprising picrolonic acid (HPA) and benzo-15-crown-5 (B15C5) in chloroform has been used for the extraction of Nd3+, Tb3+ and Lu3+ as representatives of lanthanide(III) ions from pH 1-2 solutions having ionic strength of 0.1 mol l-1 (K+/H+, Cl-)...
Keywords: Extraction, Nd3+, Tb3+, Lu3+, Picrolonic acid
08/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagElectrochemical behavior of uranium(VI) in 1-butyl-3-methylimidazolium chloride and in 0.05 M aliquat-336/chloroform
Alkali metal uranyl chloride (M2UO2Cl4 (M = Na or Cs)) was dissolved in 1-butyl-3-methylimidazolium chloride (bmimCl) and the redox behavior of uranyl ion present in the resultant solution was investigated by cyclic voltammetry at 343 K...
Keywords: Room temperature molten salts, Uranium, Electrodeposition, Cyclic voltammetry, Extraction
08/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagIon interaction (SIT) coefficients for the Th4+ ion and trace activity coefficients in NaClO4, NaNO3 and NaCl solution determined by solvent extraction with TBP
Trace activity coefficients of the Th4+ ion in dilute to concentrated NaClO4, NaNO3 and NaCl solutions ([H+]=0.01−0.02 M) have been determined at 22 °C from liquid-liquid phase equilibria with 10−50 vol.% TBP in n-dodecane...
Keywords: Thorium, TBP, Extraction, Activity coefficients, SIT
09/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagOn the stability of Pu(III) at different pH under non-inert conditions
A glove-box in contact with the lab atmosphere has been used in a test to see whether trivalent plutonium can be kept in this oxidation state at different pH...
Keywords: Plutonium, Trivalent, Oxidation state, Extraction, Sorption
09/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagEffect of alkyl substituents on extraction properties and solubility of calix[4]arene dialkylphosphine oxides
The extraction properties of calix[4]arenes, substituted by CH2P(O)Alk2-group on the upper rim were studied...
Keywords: Extraction, Europium, Americium, Calix[4]arene dialkylphosphine oxides, Solubility
02/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagExtraction Distribution of Sodium Picrate in the Water–Nitrobenzene System in the Presence of p-tert-Butylcalix[4]arene-tetrakis(N,N-diethylacetamide)
From extraction experiments with 22Na as a tracer, the extraction constant corresponding to the equilibrium Na+(aq) + A-(aq) + L(nb) ↔ NaL+(nb) + A-(nb) taking place in the two-phase water–nitrobenzene system [A- = picrate, L = p-tert -butylcalix[4]arene-tetrakis(N,N-diethylacetamide); aq = aqueous phase, nb = nitrobenzene phase] was evaluated as log Kex(NaL+, A-) = 4.6± 0.1...
Keywords: Sodium Picrate, Calix[4]arene Compound, Extraction, Water–Nitrobenzene System, Stability constant
12/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagMetal extraction by N,N′-dialkyl-N,N′-diaryl-dipicolinamides from nitric acid solutions
A study of americium, uranium and europium extraction by various dialkyl-diarylamides of 2,6-pyridine-dicarboxylic (dipicolinic) acid has shown that maximum extractability is achieved by using polar fluorine-substituted diluents...
Keywords: Dialkyl-diarylamides of 2,6-pyridine-dicarboxylic (dipicolinic) acid, Extraction, Americum, Uranium, Europium
04/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagEquilibrium Partitioning of Phenols and Phenyl Amines between [BF4]- Based Ionic Liquids and Aqueous Solution
In this paper, ionic liquids [C6mim][BF4] and [C8mim][BF4] have been used, for the first time, as alternative solvents for the extraction of organic pollutants such as phenols and phenyl amines from aqueous solution...
Keywords: Extraction, Phenols, Phenyl Amines, Ionic Liquids
06/2007 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagOptimization of floridoside production in the red alga Mastocarpus stellatus : pre-conditioning, extraction and seasonal variations
The red alga
Keywords: Extraction, floridoside, Mastocarpus stellatus, pre-conditioning, red algae
04/2007 | Botanica Marina, Walter de GruyterCarrageenan of Eucheuma isiforme (Solieriaceae, Rhodophyta) from Yucatán, Mexico. I. Effect of extraction conditions
The yield and physicochemical properties of carrageenan from
Keywords: carrageenan, Eucheuma isiforme, Extraction, gel properties, Structure
02/2006 | Botanica Marina, Walter de GruyterThe effect of molecular composition of xylan extracted from birch on its assembly onto bleached softwood kraft pulp
The effect of the molecular structure of xylan on its assembly onto softwood kraft pulps was investigated...
Keywords: Adsorption, agglomeration, cellulose fibres, Extraction, glucuronoxylan
03/2006 | Holzforschung, Walter de GruyterUpgrading of paper-grade pulps to dissolving pulps by nitren extraction: Optimisation of extraction parameters and application to different pulps
Xylans were selectively removed from paper-grade pulps by nitren extraction to produce dissolving pulps...
Keywords: carbohydrate composition, Cuen viscosity, dissolving pulp, Extraction, glucomannan, nitren, paper-grade pulp, xylan
07/2006 | Holzforschung, Walter de GruyterSelective separation of silver(I) by novel substituted thiourea
The extraction of silver(I) from nitric acid solutions using naphthyl substituted thiourea such as 1-naphthylthiourea (ANTU) has been studied...
Keywords: 1-Naphthylthiourea (ANTU), Extraction, Silver
08/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagEmporeTM strontium rad disks: validation procedure for strontium-90 analysis in radioactive wastes
90Sr determination in radioactive waste is currently supported by EichromTM Sr-spec concentration columns...
Keywords: 90Sr, Membrane disk, Extraction, environment, Waste
09/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagEvaluation of selectivity and radiolysis behavior of some promising isonicotinamids and dipicolinamides as extractants
A series of long chain isonicotinamides (pyridine-4-carboxamides) and dipicolinamides (pyridine-2,6-dicarboxamides) have been prepared with different substituting groups and the extracting ability for Fe(III), Am(III), Eu(III), Sr(II), Co(II) and Cs(I) from nitric acid solutions has been studied...
Keywords: Extraction, Isonicotinamides, Dipicolinamides, Radiolysis, selectivity
09/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagThe behaviour of organic solvents containing C5-BTBP and CyMe4-BTBP at low irradiation doses
Low doses of gamma radiation were given to four different solvents containing C5-BTBP and CyMe4-BTBP, each molecule dissolved both in cyclohexanone and hexanol...
Keywords: Solvent, Irradiation, Low doses, Extraction, Am
11/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagSynergistic extraction of Ce(III), Tb(III) and Lu(III) with a mixture of hexafluoroacetylacetone and triphenylphosphineoxide in benzene
The synergistic solvent extraction of trivalent lanthanides such as Ce(III), Tb(III) and Lu(III) has been studied with a mixture of hexafluoroacetylacetone (HHFA) acting as an acidic chelating agent and triphenylphosphine oxide (TPPO) as a neutral ligand in benzene from aqueous solution of pH 2.5 having ionic strength 0.01 mol dm-3 (K+/H+, Cl-)...
Keywords: Extraction, Ce(III), Tb(III), Lu(III), Hexafluoroacetylacetone
12/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagLiquid–liquid extraction of uranium from nitric acid solution using di-n-butylsulfoxide in petroleum ether as extractant
A simple, efficient and economical liquid–liquid extraction method has been developed for quantitative extraction of uranium from 2 M HNO3 using di-n-butyl sulfoxide in petroleum ether...
Keywords: Uranium, Extraction, Dibutylsulfoxide, Petroleum ether, Nitric acid
01/2008 | Radiochimica Acta, Oldenbourg WissenschaftsverlagSolvent extraction of americium and europium ions by amide-derivatized polyethers from picric acid aqueous solution
The extraction of Am3+ and Eu3+ from picric acid aqueous solution by N,N-1,2-ethanediyl-bis[2-(N,N-diphenyl-carbamoyl-methoxy)-benzamide] was investigated by a radioactive tracer technique...
Keywords: Americium, Europium, Extraction, Picric acid, Amide-derivatized polyethers
03/2008 | Radiochimica Acta, Oldenbourg WissenschaftsverlagAnti-microfouling activities in extracts of two invasive algae: Grateloupia turuturu and Sargassum muticum
Marine macroalgae are particularly prone to epiphytism. The colonisation of their surface may lead to severe perturbations and sometimes to the death of the host...
Keywords: antimicrobial, Bacteria, Extraction, Fungi, Grateloupia turuturu, microalgae, microfouling, Sargassum muticum, screening
06/2008 | Botanica Marina, Walter de GruyterHydrothermal dissolution of mixed southern hardwoods
A hydrothermal dissolution profile of wood components cellulose, hemicelluloses, and lignin of hardwood during autohydrolysis for 100 min at temperatures from 130 to 170°C in a modified accelerated solid extraction system (Dionex ASE-100) is described...
Keywords: autohydrolysis, Extraction, hardwood, hemicelluloses, lignin, oligosaccharides, xylan
09/2008 | Holzforschung, Walter de Gruyter