Voltammetric determination of palladium in copperxnickel sulfide ores

Eduard V. Gorchakov, Darya O. Perevezentseva, Elena A. Vaitulevich, Jin Chun Kim, Bagama M. Bagamaev

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The research deals with the need to determin palladium content in copper-nickel sulfide ores, copper sludges, nickel concentrates in the presence of gold in order to study new deposits of noble metals and calculate their reserves, and to determine as well the content of palladium in waste from various industries. The aim of the work was to find the optimum conditions of palladium determination in the presence of gold in copper-nickel sulfide ores, copper sludges, nickel concentrates and to eliminate its interfering influence in palladium voltammetric determination. The methods: stripping voltammetry, atomic adsorption spectrometry, transmission electron microscopy. Results. The authors have defined optimum conditions of palladium determination in ores after ultraviolet irradiation in the presence of oxalic acid. They are as follows: graphite indicator electrode, Eacc= -0,9 V, tacc=120 s, v=0,08 V s-1. The authors developed the method for determining palladium in gold'bearing ores. The method eliminates the interfering effect of gold without changing the linear dependence of height of anodic maximum of palladium ions on its concentration. Furthermore, palladium voltammetry determination time reduces by three times compared to the standard procedure. The current research has shown that reduction of gold compounds with ultraviolet irradiation occurs to elemental gold in the form of fractal structures. It is demonstrated that the anodic maximum height of palladium ions increases linearly when its concentration changes from 0,1 to 1000 mg l-1. The proposed analytical method has satisfactory metrological characteristics. The accuracy factor of the palladium determination is from 30 to 42 % by stripping voltammetry. It is equal to 13-36 % by atomic adsorption spectrometry.

Original languageEnglish
Pages (from-to)108-116
Number of pages9
JournalBulletin of the Tomsk Polytechnic University, Geo Assets Engineering
Volume329
Issue number5
Publication statusPublished - 2018

Keywords

  • Atomic adsorption
  • Gold
  • Palladium
  • Stripping voltammetry
  • Transmission electron microscopy
  • Ultraviolet irradiation

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology
  • Waste Management and Disposal
  • Economic Geology
  • Management, Monitoring, Policy and Law

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