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Influence of Impurities in Commercial Solvent Extraction Processes. This project directly supports the solvent extraction industry in Australia. This industry is responsible for generating in excess of $600M annually of export earnings for Australia. This type of technology can be applied in the recovery of base metals such as coper, nickel, cobalt, etc and in the environmental area for the clean up of heavy metals from waste water. Solvent extraction has the advantage of high selectivity that ....Influence of Impurities in Commercial Solvent Extraction Processes. This project directly supports the solvent extraction industry in Australia. This industry is responsible for generating in excess of $600M annually of export earnings for Australia. This type of technology can be applied in the recovery of base metals such as coper, nickel, cobalt, etc and in the environmental area for the clean up of heavy metals from waste water. Solvent extraction has the advantage of high selectivity that enables metals to be recovered and recycled, thus reducing the wastage of these metals in, for example, the chromium plating process.Read moreRead less
The Role of the Interface in Solvent Extraction. This project involves a fundamental study of the kinetics of reactions that occur in solvent extraction processes used for separation of many of Australia's metals from minerals. The understanding gained from this will enable a greater efficiency to be obtained from Australia's minerals industry. In particular, it is intended to investigate the role of additives on the kinetics of metal extraction; these additives either enter the solution from ....The Role of the Interface in Solvent Extraction. This project involves a fundamental study of the kinetics of reactions that occur in solvent extraction processes used for separation of many of Australia's metals from minerals. The understanding gained from this will enable a greater efficiency to be obtained from Australia's minerals industry. In particular, it is intended to investigate the role of additives on the kinetics of metal extraction; these additives either enter the solution from the ore or are added as flocculants during the process, and have a significant effect on the performance. With the move to smaller, shorter residence time contactors, this has become increasingly important if these new contactors are to be used efficiently.Read moreRead less
Nitrogen Removal in Wastewater Treatment Using the Nitrite Pathway. Nitrogen removal from our wastewater is becoming very important in most parts of Australia to protect our unique aquatic environment. This removal is achieved biologically through two steps: Nitrification converts ammonium via nitrite to nitrate; and denitrification converts nitrate via nitrite again to harmless nitrogen gas. This project aims to develop a method that allows this process to go just via nitrite, instead of nitrat ....Nitrogen Removal in Wastewater Treatment Using the Nitrite Pathway. Nitrogen removal from our wastewater is becoming very important in most parts of Australia to protect our unique aquatic environment. This removal is achieved biologically through two steps: Nitrification converts ammonium via nitrite to nitrate; and denitrification converts nitrate via nitrite again to harmless nitrogen gas. This project aims to develop a method that allows this process to go just via nitrite, instead of nitrate, to nitrogen gas. This would significantly reduce oxygen and/or carbon requirement in nitrogen removal. If successful, the new operating method will allow modern wastewater treatment plants to achieve a better effluent quality at lower costs.Read moreRead less
Accurately locating the depth and distribution of saline waters with improved shallow conductivity sounding using broadcast radio transmissions. Conductivity meters such as the EM31 are in routine use for mapping shallow salinity, but provide no depth information. This research will provide methodology using broadcast radio transmissions to additionally provide the depth information needed to interpret shallow layering and inhomogeneity. Instruments will initially be tested on the ground, but a ....Accurately locating the depth and distribution of saline waters with improved shallow conductivity sounding using broadcast radio transmissions. Conductivity meters such as the EM31 are in routine use for mapping shallow salinity, but provide no depth information. This research will provide methodology using broadcast radio transmissions to additionally provide the depth information needed to interpret shallow layering and inhomogeneity. Instruments will initially be tested on the ground, but are ultimately intended to be applied from the air, where existing systems have no resolution in the top 5 m. The method will provide crucial root-zone data for precision agriculture in salt-affected areas, and address accurate salt mapping issues in the major efforts to combat Australia's salinity problems.Read moreRead less
Evaluating a biogeochemical mechanism for soil anomaly formation using diffusive thin-film samplers in geochemical exploration. We expect to develop new and effective technology for geochemical exploration for gold and base metals. This technology will take the form of: (i) increased understanding of, and a new conceptual model for, biogeochemical formation of soil geochemical anomalies in transported overburden; (ii) new chemical analysis techniques for soils and groundwater in mineralised area ....Evaluating a biogeochemical mechanism for soil anomaly formation using diffusive thin-film samplers in geochemical exploration. We expect to develop new and effective technology for geochemical exploration for gold and base metals. This technology will take the form of: (i) increased understanding of, and a new conceptual model for, biogeochemical formation of soil geochemical anomalies in transported overburden; (ii) new chemical analysis techniques for soils and groundwater in mineralised areas. Improved models for anomaly formation will provide a clearer frame work for exploration in terrain under transported cover. New methodology has the potential to enhance anomaly detection for buried mineralisation, especially if the anomaly has formed biogeochemically.Read moreRead less
The interplay between natural and human perturbations in structuring marine habitats. Empirical predictions of which could be the changes to natural habitats caused by human perturbations will increase the ability to prevent irreversible losses of biodiversity. This project will enable the planning of sound strategies for the conservation of valuable ecosystems, such as kelp forests, in view of the massive changes that will likely take place as a consequence of increasing exploitation of marine ....The interplay between natural and human perturbations in structuring marine habitats. Empirical predictions of which could be the changes to natural habitats caused by human perturbations will increase the ability to prevent irreversible losses of biodiversity. This project will enable the planning of sound strategies for the conservation of valuable ecosystems, such as kelp forests, in view of the massive changes that will likely take place as a consequence of increasing exploitation of marine resources and of global climatic changes. The scientific knowledge generated by this project is necessary for a sustainable development of coastal areas, which would guarantee the provision of goods and services to Australian future generations.Read moreRead less
Local and regional investigations into perturbations of marine habitat. Surprising changes to coastal ecology are forecast as increasing physical stresses (e.g. nutrient and sediment runoff) initiate changes to habitat. Lack of information about perturbations remains a major gap in marine ecology and coastal management. Multifactorial experiments will examine perturbations to one of temperate Australia's most widespread subtidal habitats (kelp forests) to test predictions derived from ecologic ....Local and regional investigations into perturbations of marine habitat. Surprising changes to coastal ecology are forecast as increasing physical stresses (e.g. nutrient and sediment runoff) initiate changes to habitat. Lack of information about perturbations remains a major gap in marine ecology and coastal management. Multifactorial experiments will examine perturbations to one of temperate Australia's most widespread subtidal habitats (kelp forests) to test predictions derived from ecological theory. Tests focus on (1) models about abrupt switches of habitat to contrasting states, and (2) responses among regions bearing striking differences in consumer control. These trans-Australian tests may change the way we view one of the world's most extensive temperate coastlines.Read moreRead less
Managing Australia's unique south coast. Innovative coastal management based on sound ecological understanding is a pressing issue in state and federal government. A federal initiative seeks integration of marine protected areas with other spatial arrangements for conservation of biodiversity. This proposal will inform the forthcoming selection of marine protected areas in South Australia. Significantly, it assesses whether adjacent land-use (natural vegetation, urbanisation, agriculture) can ....Managing Australia's unique south coast. Innovative coastal management based on sound ecological understanding is a pressing issue in state and federal government. A federal initiative seeks integration of marine protected areas with other spatial arrangements for conservation of biodiversity. This proposal will inform the forthcoming selection of marine protected areas in South Australia. Significantly, it assesses whether adjacent land-use (natural vegetation, urbanisation, agriculture) can enhance or compromise the utility of marine protected areas as a biodiversity repository.
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Practical Application of Filtration Theory to the Minerals Industry. The project aims to provide a quantitative basis for the selection, design, operation and maintenance of filter devices in the minerals industry. This will be achieved through characterisation of materials to be filtered by developing a model of the true role of the membrane in filtration. Experimental parameters will be input to first principles filtration models. This will reduce the incidence of poor operational outcomes ....Practical Application of Filtration Theory to the Minerals Industry. The project aims to provide a quantitative basis for the selection, design, operation and maintenance of filter devices in the minerals industry. This will be achieved through characterisation of materials to be filtered by developing a model of the true role of the membrane in filtration. Experimental parameters will be input to first principles filtration models. This will reduce the incidence of poor operational outcomes for filter presses and provide a sound basis for the maintenance of filter cloths and membranes.Read moreRead less
Impact of increased sediment and nutrient discharges on the long-term sustainability of the Great Barrier Reef. The Great Barrier Reef, one of Australia's greatest natural assets, is under increasing threat from extreme climatic events caused by global warming and from land-based pollution. This research will identify the main sources of sediment and nutrient pollution caused by river runoff and by how much this has increased above 'natural levels'. We will discover how the very sensitive offsho ....Impact of increased sediment and nutrient discharges on the long-term sustainability of the Great Barrier Reef. The Great Barrier Reef, one of Australia's greatest natural assets, is under increasing threat from extreme climatic events caused by global warming and from land-based pollution. This research will identify the main sources of sediment and nutrient pollution caused by river runoff and by how much this has increased above 'natural levels'. We will discover how the very sensitive offshore coral reefs have responded to increased pollution and whether this is the cause of the very devastating crown-of-thorn-starfish infestations. Understanding the long-term effects of land-based pollution on the ecology of coral reefs in the GBR will thus provide a scientific basis to help ensure that it has a sustainable future.Read moreRead less