Liquid-liquid extraction of cadmium(II) by TIOACl (tri-iso-octylammonium chloride) ionic liquid and its application to a TIOACl impregnated carbon nanotubes system

Abstract

RESUMEN: Extracción líquido-líquido de cadmio(II) mediante el líquido iónico ClTIOA (cloruro de tri-iso-octyl amonio) y su aplicación en un sistema de nanotubos de carbono impregnados conClTIOA. Se ha estudiado la extracción de cadmio(II), de disoluciones en medio HCl, por el líquido iónico (R 3 NH + Cl − ) (R: tri-iso-octyl) disuelto en Exxsol D100. La reacción de extracción tiene un carácter exotérmico. El análisis numérico de la distribución del metal sugiere la formación de las especies R 3 NH + CdCl 3 − y (R 3 NH + ) 2 CdCl 4 2− en la fase orgá-nica. Estos resultados se han implementado en un sistema que utiliza nanotubos de carbono de pared múltiple impregnados con este líquido iónico. Se han investigado diversas variables experimentales: velocidad de agitación de la disolución acuosa (250-2000 min −1 ), adición del adsorbente (0,05-0,2 g) y temperatura (20-60 °C).

Facilitated Chromium(VI) Transport across an Ionic Liquid Membrane Impregnated with Cyphos IL102

“…Having some specific features, such as versatile solubility, non-volatility, physical and chemical stabilities, etc., make them a real alternative to hazardous volatile organic chemicals, especially solvents, though there are also serious concerns about the hazardousness of ionic liquids. Their applications do not end as substitutes of such solvents because, due to another important feature of these chemicals, i.e., the ability of their molecular structure to be tailored (task-specific ionic liquids) according to application requirements; they expand to catalysis, coordination chemistry, analytical chemistry, polymer materials, nanotechnologies, lithium-based batteries, etc., and also in separation processes of metals and other solutes [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16].…”

Carbon-Based Nanomaterials Functionalized with Ionic Liquids for Microextraction in Sample Preparation

“…Usually, an organic solvent is added to a mixture of CNT-IL to ensure the good dispersion of IL and the reproducibility of the synthesis [24]. Under this principle, functionalized CNTs with tri-iso-octylammonium bromide were used as an adsorbent for cadmium ions [26]. Unmodified CNTs were unable to extract cadmium ions, highlighting the necessity of the IL.…”