Effect of a dc magnetic field on the electrical conductivity of ammonia solutions containing tungsten(VI) and rhenium(VII) ions

Abstract

The effect of a dc magnetic field (60-120 mT) on the electrical conductivities of ammonia solu tions containing the W(VI) and Re(VII) ions in the course of magnetic processing for 24-48 h is studied. Magnetic processing is found to increase the electrical conductivities of 7 M ammonium hydroxide solutions containing 1 g/L tungsten or rhenium by 52-58%. The electrical conductivities of the solutions in a magnetic field are shown to depend linearly on the solution temperature and the tungsten or rhenium ion concentration in a solution. High electrical conductivities are retained for a log time (up to 2000 h) after the end of the action of a magnetic field. These investigations are carried out to solve the electrochemical problems of processing of the metallic wastes of the production of tungsten and rhenium.

The Effect of a Spiral Gradient Magnetic Field on the Ionic Conductivity of Water

“…Interesting results comprising, above all, a major conductivity variation, are presented by Levchuk and Levin [20], who established that the 48-hour long exposure of 7 M NH 4 OH solutions containing 1 g/L tungsten or rhenium to a 60 mT magnetic field increases the electrical conductivity of such solutions by 53%-56%, considering the ambient temperature of 20 • C. These researchers did not perform their experiments on pure water; however, a static magnetic field would presumably cause an increase not exceeding 5%, a rate already proposed within reports [18,19].…”