Separation of Nickel and Copper by Solvent Extraction Using Di‐2 Ethylhexylphosphoric Acid‐Based Synergistic Mixture

Belkhouche, Nasr‐Eddine; Didi, Mohamed Amine; Villemin, Didier

doi:10.1081/sei-200066290

Cited by 48 publications

(24 citation statements)

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“…The method employs an ILE with an acid organophosphorous compound, following methods described by Pepper et al (2010). This method has long been used in industrial hydrometallurgy (e.g., Belkouche et al, 2005;Guezzen and Didi, 2012 and references therein), and is reported to quantitatively and selectively extract Fe 3+ independent of dissolved organic C (DOC) concentration (Pepper et al, 2010). The extraction portion of the ILE method proceeds via a three-step mechanism.…”

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confidence: 99%

Ionic Liquid Extraction Unveils Previously Occluded Humic‐Bound Iron in Peat Soil Pore Water

Veverica

Kane

Marcarelli

et al. 2016

Soil Science Soc of Amer J

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Globally, peatland ecosystems store tremendous amounts of C relative to their extent on the landscape, largely owing to saturated soils which limit decomposition. While there is still considerable uncertainty regarding CO 2 production potential below the water table in peatland ecosystems, extracellular Fe reduction has been suggested as a dominant pathway for anaerobic metabolism. However, colorimetric methods commonly used to quantitate Fe and partition between redox species are known to be unreliable in the presence of complex humic substances, which are common in peatland pore water. We evaluated both the standard o-phenanthroline (o-P) Method and an ionic liquid extraction (ILE) Method followed by quantitation with inductively coupled plasma optical emission spectrometry (ICP-OES) to compare total Fe recovery and Fe 2+ /Fe 3+ ratios in four distinct peatland ecosystems, ranging from rich fen to bog. While total Fe concentrations measured with ILE and o-P were correlated, the ILE method proved to be superior in both total Fe quantitation and in separately quantifying ferric (Fe 3+ ) and ferrous (Fe 2+ ) iron. In peat pore water, the o-P Method underestimated Fe 3+ by as much as 100%. A multivariate approach utilizing fluorescenceand ultraviolet (UV)-visable (Vis) spectroscopy identified indices of dissolved organic matter (DOM) humification and redox status that correlated with poor performance of the o-P Method in peat pore water. Where these interferences are present, we suggest that site-specific empirical correction factors for quantitation of total Fe by o-P can be created from ILE of Fe, but recommend ILE for accurate appraisals of iron speciation and redox processes.Abbreviations: DI, deionized; DOC, dissolved organic carbon; DOM, dissolved organic matter; EEMs, excitation-emissions matrices; FI, fluorescence index; H p , index of humification; ICP-OES, inductively coupled plasma optical emission spectrometry; ILE, ionic liquid extraction; o-P, o-phenanthroline; PARAFAC, parallel factor analysis; PCA, principal component analysis; RI, index of redox dissolved organic matter status; TEA, terminal electron acceptor; UV, ultraviolet; Vis, visible. P eatlands represent critical terrestrial C stores that are preserved by a combination of hypoxic and anoxic soil environments. These conditions present an energetic challenge for microbial consortia in anaerobic environments which utilize alternative (to oxygen) terminal electron acceptors (TEAs) during heterotrophic metabolism. In anaerobic conditions, microbes preferentially reduce several alternative TEAs for respiration, with thermodynamic yield declining in the order: NO 3 -, Mn 4+ , Fe 3+ , SO 4 2-, and ultimately CO 2 (see review by Megonigal et al., 2004). Although there is wide agreement that alternative TEA reduction is important for anaerobic decomposition, variation in the magnitudes of anaerobic CO 2 production across studies suggests that there is high variability in facultative and obligate anaerobic processes that occur below the water table (M...

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confidence: 99%

Ionic Liquid Extraction Unveils Previously Occluded Humic‐Bound Iron in Peat Soil Pore Water

Veverica

Kane

Marcarelli

et al. 2016

Soil Science Soc of Amer J

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“…A standard stock solution of 1000 mg/L uranium (VI) has been prepared by dissolving 1.782 g of uranyl acetate dihydrate UO 2 (CH 3 COO) 2 .2H 2 O (Prolabo) in 1000 ml distilled water acidified with 2 ml conc. sulfuric acid.…”

Section: Synthetic Stock Solutionsmentioning

confidence: 99%

“…Many types of adsorbents have been synthesized and studied for the recovery and separation of uranium (VI) such as Alizaren Red-S modified anion exchange resin (7) , a copolymer composed of acrylic acid (AA) and 2-acrylamide-2-methylpropane sulfonic acid (AMPS) crosslinked with N,Nmethylene bisacryl amide (8) and crosslinked acrylic acid (AA) acrylonitrile (AN) copolymer resin (9) . A survey of the concerned literature indicates that uranium (VI) can be adsorbed as both the anionic complex species [UO 2 (SO 4 ) 2 2-] and [UO 2 (SO 4 ) 3 4-] by a strong base anion exchange resin or else as a uranyl cation UO 2 2+ by a chelating ion exchange resin. Uranium (VI) adsorption using the low cost citrus biomass at pH 4 (10) and Amberlite XAD-2 impregnated with cyanex-272 from the ore tailings of the complex oxide mineral uranmicrolite has given an uptake capacity of 41.76 mg/g (11) .…”

Section: Introductionmentioning

confidence: 99%

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Equilibrium and Kinetic Characteristics of Uranium Recovery by the Strong Base Ambersep 920U Cl Resin

Cheira¹,

El‐Didamony²,

Mahmoud³

et al. 2014

IOSRJAC

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“…In the extraction of metal ions, the choice of the extractant molecule is a key element of the extraction process [4]. Indeed, it must have a high extracting power and be optionally selective with respect to the targeted metal solute.…”

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Liquid-liquid extraction of iron (III) from Ouenza iron ore leach liquor by tributylphosphate

Nouioua

2017

J. Fundam and Appl Sci.

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The solvent extraction of iron (III) from the hydrochloric acid leach liquor of iron ore from mine of Ouenza, Algeria with tributylphosphate (TBP) in chloroform was studied. The effect of several parameters, such as contact time, HCl concentration, TBP concentration and chloride inorganic salt (KCl) concentration on the efficiency of extraction of iron was examined at 19±2 °C. It was found that, for 2 min 3M TBP in presence of 5M HCl and 2 M KCl solutions led to a high yiel of extraction (98.57 %) of iron (III).The stoichiometry of the extracted species was determined by using the method of slope analysis. The number of moles of H +, Cl -and TBP associated with the extracted species was determined and the extracted species was found to be HFeCl 4 (TBP) 2 .

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Separation of Nickel and Copper by Solvent Extraction Using Di‐2 Ethylhexylphosphoric Acid‐Based Synergistic Mixture

Cited by 48 publications

References 13 publications

Ionic Liquid Extraction Unveils Previously Occluded Humic‐Bound Iron in Peat Soil Pore Water

Ionic Liquid Extraction Unveils Previously Occluded Humic‐Bound Iron in Peat Soil Pore Water

Equilibrium and Kinetic Characteristics of Uranium Recovery by the Strong Base Ambersep 920U Cl Resin

Liquid-liquid extraction of iron (III) from Ouenza iron ore leach liquor by tributylphosphate

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