Recovery of Nickel(II) Ions from Sulphate/Chloride Solutions Using Hydrophobic Pyridylketoximes

Abstract

In this study, the extraction of nickel(II) ions from sulphate and sulphate/chloride solutions with 2-, 3-, and 4-pyridylketoximes was investigated. The effect of different variables influencing the extraction of nickel(II) ions such as the extractant structure and the concentration of hydrogen ion, sulphate, and chloride ions have been studied. The shaking time and temperature also influenced metal ion removal. It was found that the hydrophobic 2-pyridylketoximes are the most effective extractants for nickel ions from sulphate/chloride solutions. The discussion also includes the mechanism of nickel(II) complexation by the hydrophobic pyridylketoximes and the speciation of nickel(II) in the presence of chloride and sulphate ions.

Photodegradation of Hydrophobic Pyridineketoximes in Toluene and Heptane

“…The compounds are widely used as analytical reagents , in medicinal preparations and as components of photodynamic herbicides . The extraction ability of hydrophobic 2‐ and 3‐ pyridineketoximes dissolved in aromatic as well as in aliphatic diluents toward copper(II), zinc(II), cadmium(II), nickel(II) and iron(III) from aqueous solutions has been broadly investigated . The results of our works have shown the possibilities of the pyridineketoximes as extractants for recovery of metals from industrial processes.…”

Synthesis of amphiphilic block copolyamines via click reaction

“…Some of the extractants used for the removal metal ions from aqueous solutions include ionic liquid, [44,45] small organic molecules, either in free form [46,47] or immobilized on polymeric surfaces [48,49] and functional polymers bearing ligands for metal complexation [50]. In comparison to the solid-liquid extractions this method has advantage of utilizing larger surface of the adsorbents for extractions and the process is proven to be useful in extracting several metal ions.…”

Synthesis and Characterization of a Novel Series of Amphiphilic Mercapto‐1,2,4‐Triazole Schiff Base Ligands: Investigation of their Behavior in Hydro‐Organic Solutions

“…The extraction efficiency (E %), the contact time and the extraction equilibrium pH e of the liquid-liquid extraction of nickel(II) with the present amphiphilic ligands were compared and those previously reported are listed in Table 4 [78][79][80][81][82][83][84][85][86][87][88][89]. It is immediately noticeable from this table that the amphiphilic ligands ASB18 and ASB12 present excellent extraction properties (E % = 100) compared to the other published well-known extracting ligands, such as Cyanex Ò 301, D2EHPA, HPAI, LIX860-I, STTA, R-PHA and 2-PC12.…”