https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52491 Wed 13 Mar 2024 13:56:53 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:448 Thu 25 Jul 2013 09:09:49 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46146 4NO₃ and FeS₂, a major component of reactive ground. Voltammetric processes corresponding to the Fe(II)/Fe(III) redox couple and the reduction of nitrate are observed. This is significant as the existing reaction mechanism shows nitrate reacting in the electrolyte, but not being reduced on the surface of the FeS₂. An irreversible oxidation occurs at ~0 V versus SCE associated with the re-oxidation of species formed at lower potentials. This is not associated with a change in the potential of the electrolyte, indicating a surface reaction. With the use of thermocouples, an exothermic reaction above 0.4 V is observed. FeS₂ is initially unreactive in NH₄NO₃ solutions. After FeS₂ exposure to potentials above 0.6 V versus SCE, the material becomes active and catalytic in nature. Material reacted following the industry standard Australian Explosives Industry Safety Group (AEISG) test method shows similar catalytic behaviour in the presence of fresh NH₄NO₃. This is significant for the safety and testing of reactive ground, as even FeS₂ that has completed reaction still has the potential to undergo further reaction if introduced to fresh NH₄NO₃.]]> Fri 11 Nov 2022 18:30:55 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33161 Fri 07 Sep 2018 16:40:17 AEST ]]>