The fate and toxicity of nanoparticles in the terrestrial environment. This research aims to provide the knowledge needed to understand the fate and effects of new nanoparticulate metal products in Australian landscapes. The movement and environmental effects of manufactured nanoparticulates are unknown, partly because of the difficulty of measuring and detecting these nano-products in the environment. This project will develop techniques to identify manufactured nanoparticulate metals in soils, ....The fate and toxicity of nanoparticles in the terrestrial environment. This research aims to provide the knowledge needed to understand the fate and effects of new nanoparticulate metal products in Australian landscapes. The movement and environmental effects of manufactured nanoparticulates are unknown, partly because of the difficulty of measuring and detecting these nano-products in the environment. This project will develop techniques to identify manufactured nanoparticulate metals in soils, and to determine the potential adverse effects of these products on plants and soil organisms. This will indicate the need, if any, for controls on the disposal or dispersal of nano-sized metal products in the terrestrial environment.Read moreRead less
Conservation tillage and its potential to affect catchment salt and water balances. Replacement of deep-rooted vegetation with shallow rooted crops has resulted in greater movement of water into groundwater systems, raising in groundwater level and mobilizing salt to the land's surface. The practice of conservation tillage, provides a range of advantages to landholders, but also has the potential to accentuate the risk of salinisation because it increases water infiltration into the soil surfac ....Conservation tillage and its potential to affect catchment salt and water balances. Replacement of deep-rooted vegetation with shallow rooted crops has resulted in greater movement of water into groundwater systems, raising in groundwater level and mobilizing salt to the land's surface. The practice of conservation tillage, provides a range of advantages to landholders, but also has the potential to accentuate the risk of salinisation because it increases water infiltration into the soil surface. This project aims to evaluate the impact of conservation tillage on soil salt profiles in the Condamine-Balonne and Border Rivers Catchments, and to model will the effect of changed landscape salt and water balances on river water quality.Read moreRead less
Heavy metal phytotoxicity in long-term contaminated soils: Implications for the development of Australian regulatory guidelines and realistic environmental risk assessment. Heavy metal contamination is a serious global environmental problem. There are >80,000 potentially contaminated sites in Australia alone with many of these sites in the urban environment and former mining areas. The current guidelines for phytotoxicity testing (National Environmental Protection Measure 1999) are based on tota ....Heavy metal phytotoxicity in long-term contaminated soils: Implications for the development of Australian regulatory guidelines and realistic environmental risk assessment. Heavy metal contamination is a serious global environmental problem. There are >80,000 potentially contaminated sites in Australia alone with many of these sites in the urban environment and former mining areas. The current guidelines for phytotoxicity testing (National Environmental Protection Measure 1999) are based on total metal concentrations that do not take into consideration of bioavailability and wide ranging Australian soil types. Serious concerns have been raised on the applicability of these guidelines and their protective limits in ecological risk assessment. This project aims at developing phytotoxicity guidelines applicable to a wide range of soil types common to Australia.Read moreRead less