Tim Spedding: BSc (Hons), MSc
I’m involved in a mixture of research and applied science that focuses on reducing the impact that humans have on our polar regions. This involves the assessment and clean-up of legacy and contemporary contaminated sites in the arctic and Antarctic.
As part of the Australian Antarctic Program, my emphasis has been on the research and application of soil and water remediation technologies at sites in the Antarctic and sub-Antarctic affected by fuel spills and heavy metals.
I am a geologist and soil scientist by training, having studied at the University of British Columbia (Vancouver) and McGill University (Montreal) in Canada. For the first seven years of my career I worked with industry and government studying and remediating the effects of oil and gas exploration, production and mining in the Canadian arctic. Since 2008 I have had the good fortune of working with and leading a highly experienced team of chemists, engineers and remediation scientists as part of the Human Impacts and Remediation team at the Australian Antarctic Division.
This diverse team works collaboratively with university partners to determine what remediation techniques work, or don’t work, in the unique and logistically challenging Antarctic environment. We then implement these techniques for the full scale remediation of selected sites.
Starting remediation is one thing, but knowing when to stop remediation is equally important. This requires an informed understanding of environmental risk, soil health and the environmental values that are trying to be protected, or improved. As such, our key areas of investigation include:
- Bioremediation (supporting native Antarctic soil microbes to degrade fuel and remediate soil).
- Permeable reactive barriers and water treatment to prevent migration of, and treat, contaminants in water.
- Using liners and containment systems to contain waste during the remediation process.
- Vapour intrusion and protection of human health.
- Trialling and developing “plug and play” containerized systems for soil and water clean-up.
- Using emerging remediation technologies (e.g. electrokinetics) to make remediation processes faster or more efficient.
- Understanding what a healthy and functioning Antarctic soil is, the effects of contaminants and remediation processes on soil health and determining remediation end-points to allow for risk-based decisions on reusing remediated soil.
The work that the Human Impacts and Remediation team does is very applied and results in tangible environmental improvements. In addition to cleaning up contaminated sites, our team has a tremendous opportunity to positively influence the science that supports management, protection and restoration in the Antarctic for use by all Antarctic Treaty nations, and ensure that government policy and management decisions are fully informed by science.
- #4036: Remediation of petroleum contaminants in the Antarctic and subantarctic (Chief Investigator)
- #4503: Reducing Environmental Impacts at Contaminated Sites in Antarctica (Chief Investigator)
- #4520: Assessment of waste and contamination in marine and terrestrial ecosystems with recommendations for environmental management at Mawson station (Co-Investigator)
- #4406: Atmospheric carbon fixation: a novel strategy driving niche development and climate adaptation in polar desert soils
- #4450: Using indigenous terrestrial micro-invertebrates to assess environmental impacts of soil pollution in Antarctica