Extraction of gold from thiosulfate leach liquors using selective magnetic ion exchange (MIEX) resins. Cyanide processes used for gold leaching can cause severe environmental problems. This proposal studies the use of thiosulfate as an alternative, concentrating on the design and synthesis of new functionalised magnetic ion-exchange resins, which will act as selective adsorbents for the gold thiosulfate complex and thereby facilitate the implementation of this efficient, low environmental impact ....Extraction of gold from thiosulfate leach liquors using selective magnetic ion exchange (MIEX) resins. Cyanide processes used for gold leaching can cause severe environmental problems. This proposal studies the use of thiosulfate as an alternative, concentrating on the design and synthesis of new functionalised magnetic ion-exchange resins, which will act as selective adsorbents for the gold thiosulfate complex and thereby facilitate the implementation of this efficient, low environmental impact process. Since the leaching is typically applied to ores rich in copper, resins for the recovery of copper will also be designed. Laboratory proving trials will be conducted and successful candidates will be considered for future commercialisation of a Resin-in-Pulp leaching and recovery process.Read moreRead less
Winter temperature and salinity profile measurements in the Southern Ocean using elephant seals as ocean sampling platforms. As a result of the paucity of winter data in the Southern Ocean, sophisticated ocean models such as the GFDL MOM are hampered in their ability to properly represent the complex processes in the Antarctic sea ice zone. Elephant seals forage in the Southern Ocean throughout winter, and traverse the water column between 0 and 800 metres many times each day, providing an oppo ....Winter temperature and salinity profile measurements in the Southern Ocean using elephant seals as ocean sampling platforms. As a result of the paucity of winter data in the Southern Ocean, sophisticated ocean models such as the GFDL MOM are hampered in their ability to properly represent the complex processes in the Antarctic sea ice zone. Elephant seals forage in the Southern Ocean throughout winter, and traverse the water column between 0 and 800 metres many times each day, providing an opportunity to collect profiles of temperature and salinity. The resulting data will contribute to oceanographic studies of water mass formation and frontal variability, including comparisons with historical data and assimilation into a complex ocean model.Read moreRead less
Methods of Topology: Boundary, Surface and the Inner/Outer in Kant and Wittgenstein. Ways of 'inclusion' vs. 'exclusion' are of basic and pivotal significance in social and political scenarios, e.g. of establishing identities and conducting intra- and transnational discourses. At the root of these discourses lies a vague and implicit 'metaphysics' of the nature of the 'internal', of distinction and discrimination, fostered by intuitions of alleged privileged access to the 'inner'. The project ha ....Methods of Topology: Boundary, Surface and the Inner/Outer in Kant and Wittgenstein. Ways of 'inclusion' vs. 'exclusion' are of basic and pivotal significance in social and political scenarios, e.g. of establishing identities and conducting intra- and transnational discourses. At the root of these discourses lies a vague and implicit 'metaphysics' of the nature of the 'internal', of distinction and discrimination, fostered by intuitions of alleged privileged access to the 'inner'. The project has direct impact on the de-mystification of these socially central notions, its institutional misapprehensions and cultural implications. The project is a paradigm case of how thorough philosophical analysis can yield concrete results, contributing to an understanding of personal, social and political boundaries and demarcations.Read moreRead less