Studies on Liquid‐Liquid Extraction and Recovery of Bismuth(III) from Succinate Media Using 2‐Octylaminopyridine in Chloroform

Abstract

A procedure is described for the liquid‐liquid extraction and recovery of bismuth(III) from succinate solution using 2‐octylaminopyridine (2‐OAP) as an extractant. The quantitative extraction of bismuth(III) occurs from 0.004 to 0.007 M sodium succinate solution of pH 2.5‐10 using 0.036 M 2‐OAP in chloroform. The extracted metal ion has been recovered by stripping with (3 × 10 mL) 0.5 M nitric acid. The log‐log plot of distribution ratio versus succinate concentration and distribution ratio versus 2‐OAP concentration gave slopes of 2.0 and 0.9, respectively, indicating a metal‐succinate ratio of 1:2 and a metal: 2‐OAP ratio of 1:1. The ion pair complex has a high distribution ratio in chloroform, while other solvents are poor. The extractants are stable towards prolonged acid contacts and there is no loss in its extraction efficiency even after recycling ten times. The extraction behaviour of some commonly associated metal ions, namely Ga(III), Cd(II), Zn(II), Cr(VI), Cu(II), Ba(II), Sb(III), Sn(IV), Tl(I) and Pb(II), has also been investigated. Based on partition data, conditions have been identified for attaining some separations of bismuth(III) from other metal ions; these conditions are extended for the recovery of pure bismuth from ore and alloys. Thermodynamic quantities for the extraction process were calculated.

2(4)-Aminopyridines as Ligands in the Coordination and Extraction Chemistry of Platinum Metals

“…From acetate solutions, 2-OAP extracts Ir (III) [19] from malonate -Au (III) [20]. 2-OAP and other metals are extracted in the form of ionic associates from chloride, malonate, succinate, salicylate, citrate media: To (IV) [21], Zr (IV) [22], V (V) [23], Mo (VI) [24], Cr (VI) [25], Bi (III) [26], Ga (III) [27], Tl (III) [28], Sm (III) [29], Hg (II) [30].…”

Neodymium(III) Hydroxide Coprecipitation-FAAS System for the Speciation of Chromium in Natural Waters

“…It is known that concomitant ions present at the µg/mL level in natural waters influence the determination of metal ions by atomic absorption spectrometry (36)(37)(38)(39)(40)(41)(42)(43)(44), The effects of some alkaline, alkaline earth, transition metals, and some anions on the recovery of Cr(III) were investigated and the results are summarized in Table IV. Since the recovery values for Cr(III) are generally quantitative in the presence of the investigated concomitant ions, it was found that the coprecipitation method can be applied to the analysis of natural water samples.…”

Spectrophotometric Determination of Bismuth(III) with Arsenazo(III) Reagent in Water samples and Veterinary Preparation

“…They were and still are used for burn bandage dressings ,antiseptic powders , and in the treatment of venereal diseases [4,5] . Bismuth forms low-melting alloys which are extensively used for safety devices in fire detection and extinguishing systems [6] . Bismuth is the least toxic among the heavy metals [1] .…”