Spectrophotometric Research Into Multi-Ligand Complexes Formed by Zirconium (Iv) With Stilbazole and Cetylpyridinium Chloride

Abstract

This study deals spectrophotometric analysis of the multi-ligand complex of zirconium (IV) with stilbazole and cetylpyridinium chloride. Dichloroethane was selected as the extragent and acetonitrile as the dispersant solution. Optimal conditions for the complex formation were identified. The results of the extraction process and complex formation were calculated statistically withPlackett Burman design and central composite design (via the Minitab 19 program). The values obtained showed that experimental results can be expressed as statistical results. Most important factors influencing absorption during complex formation were pH and ligand content. To obtain the maximum absorption, pH should be 4.5 and the ligand content should be 300 µL. The stoichiometric composition of the components in the complex was determined by various methods. The interval of subordination to Baer's law was 2-7.6 μg mL-1 , the molar light absorption coefficient was 2.6 × 104 L Mol-1 cm -1 , λmax = 590nm. A highly selective methodology was developed to determine the zirconium (IV) micronutrients in water samples.

English Testing of the optimum extragent for solvent-extraction of Almaly deposit copper

“…Currently, a number of extractants are offered on the market that meets the highest technological requirements [11], but in each specific case, they must be selected on the basis of preliminary studies. For the extraction recovery of copper at each enterprise of a particular deposit, depending on the composition of the productive solution [ [12], [13], [14]], it is first necessary to select the appropriate extractant with high selectivity to copper [ [15], [16], [17]]. The purpose of this work was to study the extraction properties of a number of reagents that can be used for the efficient extraction of copper from the productive solutions of the Almaly deposit for the subsequent development of the SX-EW technology.…”