A5015924769- Heavy metals in environment
- Mine drainage and remediation techniques
- Geochemistry and Geologic Mapping
- Heavy Metal Exposure and Toxicity
- Mining and Resource Management
- Water Quality and Pollution Assessment
- Metal Extraction and Bioleaching
- Pesticide and Herbicide Environmental Studies
- Arsenic contamination and mitigation
- Mineral Processing and Grinding
- Environmental Toxicology and Ecotoxicology
- Mining Techniques and Economics
- Plant Surface Properties and Treatments
- Analytical chemistry methods development
- Radioactivity and Radon Measurements
- Heavy Metals in Plants
- Cassava research and cyanide
- Tailings Management and Properties
- Pesticide Residue Analysis and Safety
- Environmental and Social Impact Assessments
- Mining and Gasification Technologies
- Radioactive element chemistry and processing
- Complementary and Alternative Medicine Studies
- Water Quality Monitoring and Analysis
- Radioactive contamination and transfer
The University of Queensland
2012-2024
Australian Synchrotron
2014
The University of Adelaide
2010-2014
Griffith University
2010
Institute of Materials Structure Science
2010
Queensland Centre for Mental Health Research
2002
National Health and Medical Research Council
2001
Commonwealth Scientific and Industrial Research Organisation
1989
TU Wien
1988
University of Tasmania
1962-1979
Abstract The extraordinary level of accumulation nickel (Ni) in hyperaccumulator plants is a consequence specific metal sequestering and transport mechanisms, knowledge these processes critical for advancing an understanding transition element metabolic regulation plants. Ni biopathways were elucidated three plant species, Phyllanthus balgooyi, securinegioides (Phyllanthaceae) Rinorea bengalensis (Violaceae), that occur Sabah (Malaysia) on the Island Borneo. This study showed mainly...
Abstract Out of 247 traditional Chinese medicines (TCM) investigated, a proportion were contaminated with arsenic (5–15%), lead (∼5%), and mercury (∼65%). Some preparations exceeded the tolerable daily intake (TDI) for males females (4 5 products, respectively), (1 2 products), (5 7 products). These exceedances as high 2760-fold, which posed potential danger to public health. As many users are known self-prescribe, there is substantial risk poisoning from consumption these TCM. Queensland...
Abstract In vivo models show that the bioavailability of soil contaminants varies between site and type matrix. Studies demonstrated assuming 100% arsenic (As) lead (Pb) from soils mine waste materials overestimates risk associated with human exposure. in vitro systems, simulated a contaminant is referred to as "bioaccessibility" used an alternative quantitative indicator for derived estimates. The general concept extraction test predict inorganic substances solid matrices by simulating...
For pesticides to effectively manage pests, they must first be deposited on the target (typically a plant surface) in manner which active ingredient(s) can readily taken up by organism. A architectural model that enables location of various components 3-D space combined with particle trajectory has been used study interception spray droplets vegetative elements. Results from simulation are compared wind tunnel studies glyphosate deposition cotton (Gossypium hirsutum L. var. Sicala), sow...
The influence of dissolved organic carbon (DOC) on the toxicity uranium (U) to three Australian tropical freshwater species, Northern Trout Gudgeon (Mogurnda mogurnda), green hydra (Hydra viridissima) and unicellular alga (Chlorella sp.) was assessed. Exposures were conducted in synthetic soft water without DOC with added form standard Suwannee River Fulvic Acid (SRFA). Organisms exposed a range U concentrations at (0−20 mg L−1). up 20 times less containing L−1 DOC, relative DOC-free test...
The diffusive gradients in thin films (DGT) equipped with a Chelex or ferrihydrite binding gel has been designed to enable the measurement of either labile metal species inorganic arsenic, respectively. In mine impacted environment, metals and metalloids commonly coexist variety species. This study, for first time reports performance DGT mixed-binding layer (MBL), consisting measurements both arsenic single assay. MBL that consists combination at ratio 1:2 greatest capacity (As), cadmium...
Background and Aims Globally, zinc deficiency is one of the most important nutritional factors limiting crop yield quality. Despite widespread use foliar-applied fertilizers, much remains unknown regarding movement from foliar surface into vascular structure for translocation other tissues key affecting this diffusion. Methods Using synchrotron-based X-ray fluorescence microscopy (µ-XRF), absorption nitrate or hydroxide was examined in fresh leaves tomato (Solanum lycopersicum) citrus...
A problem common to mines operating in the tropics is disposal of water, which may be alkaline, acidic, or contain toxic elements such as arsenic cadmium. The availability year-round water supply at many mine sites Northern Australia, particularly from pit dewatering, together with monsoonal climate, provide appropriate conditions for formation natural wetlands establishment artificial wetlands. Wetland species (particularly Typha spp.) flourish presence flowing shallow and data collected...
Fulvic acid (FA) from a tropical Australian billabong (lagoon) was isolated with XAD-8 resin and characterized using size exclusion chromatography, solid state cross-polarization magic angle spinning, 13C nuclear magnetic resonance spectroscopy, elemental analysis, potentiometric acid−base titration. Physicochemical characteristics of the FA were comparable those Suwannee River Acid (SRFA) standard. The greater negative charge density suggested it contained protons that more weakly bound...
The influence of dissolved organic carbon (DOC) on the toxicity aluminum (Al) at pH 5 (relevant to acid mine drainage conditions), tropical green hydra (Hydra viridissima), alga (Chlorella sp.), and cladoceran (Moinodaphnia macleayi) was assessed. Two DOC sources, a natural in situ soft billabong water (SBW) Suwannee River fulvic (SRFA) standard, were compared. order sensitivity test organisms Al (0.1 µm fraction) Hydra viridissima > Moinodaphnia macleayi Chlorella sp. with reducing most for...