Structural and spectrophotometric characterization of 2-[4-(dimethylamino)styryl]-1-ethylquinolinium iodide as a reagent for sequential injection determination of tungsten

Bazeľ, Yaroslav; Lešková, Martina; Rečlo, Michal; Šandrejová, Jana; Simon, András; Fizer, Maksym; Sidey, Vasyl

doi:10.1016/j.saa.2018.02.049

Cited by 21 publications

(1 citation statement)

References 63 publications

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“…Even in tiny quantities, tungstate species present a significant hazard. As a result, testing and treating natural water supplies for tungsten is essential [ 7 , 8 , 9 ]. The disposal of their waste requires proper measurements, as this waste also contains valuable metals, and tossing these heavy metals is perilous due to the depletion of their primary resources, which leads to environmental hazards because of these minerals.…”

Section: Introductionmentioning

confidence: 99%

Recovery of W(VI) from Wolframite Ore Using New Synthetic Schiff Base Derivative

Elbshary

Gouda

Sheikh

et al. 2023

IJMS

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A new synthetic material, namely, (3-(((4-((5-(((S)-hydroxyhydrophosphoryl)oxy)-2-nitrobenzylidene) amino) phenyl) imino) methyl)-4-nitrophenyl hydrogen (R)-phosphonate)), was subjected to a quaternary ammonium salt and named (HNAP/QA). Several characterizations, such as FTIR spectrometry, 1H-NMR analysis, 13C-NMR analysis, 31P-NMR Analysis, TGA analysis, and GC-MS analysis, were performed to ensure its felicitous preparation. HNAP/QA is capable of the selective adsorption of W(VI) ions from its solutions and from its rock leachate. The optimum factors controlling the adsorption of W(VI) ions on the new adsorbent were studied in detail. Furthermore, kinetics and thermodynamics were studied. The adsorption reaction fits the Langmuir model. The sorption process of the W(VI) ions is spontaneous due to the negative value of ∆G° calculated for all temperatures, while the positive value of ∆H° proves that the adsorption of the W(VI) ions adsorption on HNAP/QA is endothermic. The positive value of ∆S° suggests that the adsorption occurs randomly. Ultimately, the recovery of W(IV) from wolframite ore was conducted successfully.

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Section: Introductionmentioning

confidence: 99%

Recovery of W(VI) from Wolframite Ore Using New Synthetic Schiff Base Derivative

Elbshary

Gouda

Sheikh

et al. 2023

IJMS

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A Novel Solid Platform–Based Ag Nanoparticles Chemically Impregnated Activated Carbon for Selective Separation of Tungstate Species in Water: Kinetics and Thermodynamic Study

Al-Ahmadi

Saigl

Al-Khateeb

et al. 2020

Water Air Soil Pollut

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The level of tungstate in freshwater is disturbing due to its toxicity and its impact to human health. Thus, the current study explores the use of Ag nanoparticle (AgNP)-treated activated carbon (AgNPs/ AC) nanocomposite as solid phase extractor (SPE) for removal of trace levels of tungstate ions in water. The AgNPs/AC was synthesized by chemical binding of Ag nanoparticles onto AC. The microstructure image indicated that the AgNPs were uniformly dispersed on AC surface and thus maintaining high surface area. Scanning electron micrographs of AgNPs/AC revealed a three-dimensional structure which is suitable as SPE. The AgNPs/AC nanocomposite was used as a lowcost and effective SPE for tungstate removal from water. Adsorption of tungstate from aqueous media reached maximum at pH ≈ 4 and reached equilibrium in < 20 min. Tungstate sorption followed pseudo-secondorder kinetic with an overall rate constant (k) of 0.72 min. −1 The negative values of ΔH and ΔG are interpreted as exothermic and spontaneous reaction of tungstate sorption by the adsorbent, respectively. The positive value of ΔS (R 2 = 0.999) reflected good absorption and/or adsorption of the oxyanion [WO 4 ] 2− as an ion associate with the bulky cations and the surface area available in the nanocomposite. The sorbent A g N P s / A C w a s a l s o p a c k e d c o l u m n f o r preconcentration of trace levels of tungstate in tap water samples. Tungstate species were satisfactorily recovered with NaOH (1.0 mol L −1 ) and subsequently ICP-OES analyzed.

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Chemical vapor generation of tungsten for atomic spectrometric determination: Homogeneous sensitizer and mechanism study

He,

Hu,

Zou

et al. 2023

Analytica Chimica Acta

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Structural and spectrophotometric characterization of 2-[4-(dimethylamino)styryl]-1-ethylquinolinium iodide as a reagent for sequential injection determination of tungsten

Cited by 21 publications

References 63 publications

Recovery of W(VI) from Wolframite Ore Using New Synthetic Schiff Base Derivative

Recovery of W(VI) from Wolframite Ore Using New Synthetic Schiff Base Derivative

A Novel Solid Platform–Based Ag Nanoparticles Chemically Impregnated Activated Carbon for Selective Separation of Tungstate Species in Water: Kinetics and Thermodynamic Study

Chemical vapor generation of tungsten for atomic spectrometric determination: Homogeneous sensitizer and mechanism study

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