Cloud point extraction studies on recovery of nickel(II) from highly saline sulfate medium using salicylideneaniline mono-Schiff base chelating extractant

Youcef, M. Hadj; Benabdallah, Tayeb; Reffas, Hasnia

doi:10.1016/j.seppur.2015.05.034

Cited by 26 publications

(5 citation statements)

References 67 publications

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“…This discrepancy could be attributed to the excess SAN being extracted. Thus, this reduces the organic solvent's finite ability to extract the Co(II)-SAN complex quantitatively, minimizing microextraction efficiency [32]. Therefore, a 120 μL of 0.25% (m/v) SAN solution prepared with an ethanol solvent was selected as the best value for further studies.…”

Section: Optimization Of Complex Formationmentioning

confidence: 99%

A Univariate Optimization Strategy for Pre-concentration of Cobalt(II) in Various Matrixes by a DLLME before Analysis Using FAAS

Mehdi,

Alshamkhawy

2024

Indones. J. Chem.

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A procedure based on dispersive liquid-liquid microextraction (DLLME) for cobalt (Co) quantification in an Iraqi environmental matrix by flame atomic absorption spectroscopy (FAAS) was applied in this work. A case-study approach was chosen to obtain further in-depth information on the Co levels and to evaluate the effectiveness of N-salicylideneaniline (SAN) as a complexing agent for pre-concentration and extraction of Co. An univariate strategy was utilized to achieve the optimum extraction conditions. The estimated limits of detection (LOD) and quantification (LOQ) under optimum conditions were 1.04 and 3.47 µg L−1, respectively. The results achieved by the proposed system were compared with those using the microwave digestion/graphite furnace atomic absorption spectrometer (MWD/GF-AAS) for digest samples and also for some water samples (Direct GF-AAS). The proposed procedure was applied for analyzing eleven environmental samples. The detectable Co levels for water samples ranged from 0.72 to 4.30 µg L−1 with a relative standard deviation of 3.7–8.8%, while the concentration for solid samples ranged from 0.17–4.51 µg g−1 (2.4–11.8 RSD %). DLLME/FAAS proposed procedure is effective, simple, and has the benefit of minimizing the organic solvent consumption by a few microliters, which results in little waste.

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Section: Optimization Of Complex Formationmentioning

confidence: 99%

A Univariate Optimization Strategy for Pre-concentration of Cobalt(II) in Various Matrixes by a DLLME before Analysis Using FAAS

Mehdi,

Alshamkhawy

2024

Indones. J. Chem.

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“…In this context, and following our previous studies on the extracting properties of chelating Schiff base ligands toward heavy metals in the micellar phase, − we investigate in this paper the ability of N , N ′-bis(salicylideneaminoethyl)amine Schiff base ligand (H 2 Saldien) for the cloud point extraction of chromium(III) ion from concentrated saline sulfate medium in the presence of nonionic surfactant, Tergitol 15-S-7 (Figure ). In fact, interest in this class of ligands has grown recently due to their structural rigidity, stability, and complexing ability for various metal cations. , Furthermore, Schiff bases are well-known as organic ligands that can be readily synthesized from inexpensive starting materials, and their properties are well established in the field of coordination chemistry.…”

Section: Introductionmentioning

confidence: 99%

Design Equilibrium Parameters for Recovery of Chromium(III) from Concentrated Saline Sulfate Media via Room-Temperature Cloud-Point Extraction Process Using a Mixture of Multidentate Schiff Base Ligand/Tergitol 15-S-7 as a Novel Biodegradable Extracting System

2022

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A new eco-friendly cloud-point extraction process (CPEP) involving Tergitol 15-S-7 as a biodegradable nonionic surfactant and N,N′-bis(salicylideneaminoethyl)amine multidentate Schiff base, namely H 2 Saldien, as chelating extractant was performed for the removal of chromium(III) from concentrated aqueous sulfate medium. The phase diagram of the Tergitol 15-S-7/water micellar system was first established. Then, the effect of sodium sulfate (Na 2 SO 4 ) on the cloud points (T cp ) was determined. Chromium(III) extraction efficiency was maximized through an optimization process in which the influence of each parameter (i.e., equilibrium pH, extractant concentration, and nonionic surfactant concentration) on the chemical recoveries of Cr(III) was investigated. At optimum experimental conditions, nearly 94% extraction efficiency with a minimal volume fraction of surfactant-rich phase (ϕ s = 0.25), and ambient separation temperature (T s = 17 °C) was achieved at pH 4, in one stage. The analysis of the extraction data revealed that the cloud-point process of chromium(III) proceeds via a cation exchange mechanism. The stoichiometry of the complex extracted into the surfactant-rich phase was ascertained to have a composition of 1:2 [Cr/H 2 Saldien]. A higher extraction constant was obtained for CPE compared with conventional solvent extraction, confirming the feasibility and usefulness of the CPE for Cr(III) recovery. Overall, the rational-designed H 2 Saldien/Tergitol 15-S-7 biodegradable extractant system exhibited superior extractability for Cr(III) in the CPE process.

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“…The use and exploi-tation of these other secondary sources to metal recov-ery gives rise to the interest for more intensive cobalt and nickel separation processes. [14][15][16][17][18] So far, many achievements for cobalt or nickel enrich-ment are made in the field of solid-phase extraction [19] [ 20] cloud point extraction, salting-out liquid-liquid extraction, [21] adsorption, [22] [24] liquid membranes, [23] micro- [25] emulsion extraction and hollow fibre membranes.…”

Section: Introductionmentioning

confidence: 99%

Counter-current separation of cobalt(II)–nickel(II) from aqueous sulphate media with a mixture of Primene JMT-Versatic 10 diluted in kerosene

Belhadj

Benabdallah

Coll

et al. 2019

Separation Science and Technology

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This work claims the use of the mixture of Primene®JMT-Versatic 10 [HJMT + •Versatic − ] IL diluted in Kerosene as an extractant for cobalt/nickel separation from sulphate media by solvent extraction technique, its application on a continuous counter-current device is possible because the presence of Primene®JMT in the organic phase allows us to maintain the pH of the equilibrated aqueous phase at an almost stable value. The solvent extraction of cobalt and nickel ions is studied as a function of the extractant concentration in the organic phase and the concentration of both metals. By constructing the McCabe-Thiele diagram, we found that four steps are necessary to separate the cobalt(II) from the nickel(II) in sulphate media. A simulated continuous counter-current experiment corroborated the McCabe-Thiele predictions, obtaining a raffinate containing 83% of the inlet nickel with a purity of 99.9%, working with an A:O ratio 1:2.

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Cloud point extraction studies on recovery of nickel(II) from highly saline sulfate medium using salicylideneaniline mono-Schiff base chelating extractant

Cited by 26 publications

References 67 publications

A Univariate Optimization Strategy for Pre-concentration of Cobalt(II) in Various Matrixes by a DLLME before Analysis Using FAAS

A Univariate Optimization Strategy for Pre-concentration of Cobalt(II) in Various Matrixes by a DLLME before Analysis Using FAAS

Design Equilibrium Parameters for Recovery of Chromium(III) from Concentrated Saline Sulfate Media via Room-Temperature Cloud-Point Extraction Process Using a Mixture of Multidentate Schiff Base Ligand/Tergitol 15-S-7 as a Novel Biodegradable Extracting System

Counter-current separation of cobalt(II)–nickel(II) from aqueous sulphate media with a mixture of Primene JMT-Versatic 10 diluted in kerosene

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