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Chemistry for Sustainable Development

2006 year, number 1

Geochemical Processes Occurring in Cryogenic Zones of Sulphide Deposits Oxidation Assisted by Nitrogen Compounds

V. A. PAVLIUKOVA1 and T. I. MARKOVICH2
1Institute of Natural Resources, Ecology and Cryology, Siberian Branch of the Russian Academy of Sciences, Ul. Butina 26, Chita 672014 (Russia)
E-mail: root@cinr.chita.su
2Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences,
Pr. Akademika Koptyuga 3, Novosibirsk 630090 (Russia)
(Received April 4, 2004; in revised form November 25, 2005)
Pages: 83-86

Abstract

Sulphuric acid leaching of sulphide ores assisted by nitrous compounds in Udokan copper deposits was studied regarding the effect of low and high temperatures. Negative temperatures were found to intensify the leaching of copper dramatically. Nitrous acid appears to be the catalyst of the process. Experimental results show that heavy metals in the cryogenic zones of sulphide ores demonstrate high mobility at oxidation processes assisted by nitrous compounds.