来源： 发布时间：2017-04-07 点击次数：
Soil contaminant bioavailability: from science to regulation
报 告 人 Professor Ravi Naidu
报告时间 2017.4.7 上午10:00
报告介绍 The last 100 years has seen massive economic development that has led to thousands of contaminated sites, of which many are in urban and peri-urban areas with potentially high value land. Uncertainties associated with the derivation of risks to human health from contaminants may result in the overestimation of risks, leading to remediation of site contamination which is more extensive and expensive than it should otherwise be. Uncertainty factors used in risk assessments may come from but are not limited to the extrapolation of adverse effects from animal species to humans, overly conservative safety factors accounting for intra- and inter-species variation, default assumption of 100% bioavailability, inaccurate assessment of pathway contribution and not accounting for speciation and chemical fate. However, a key contributor to uncertainties associated with risk quantification has been the lack of recognition by regulators that irrespective of the nature of contaminants, risk is associated with both duration of exposure as well as contaminant bioavailability. A key feature of this is recognition of bioavailability by policy makers. This presentation demonstrates how CRC CARE has translated laboratory based studies in bioavailability to national policy- a challenging task.
报告人简介：Professor Ravi Naidu is a global leader in contamination studies, studying agricultural and industrial impacts on the environment.
His research has led to the implementation of policy directives for governments and new technology to manage and remediate polluted groundwater and soil, both in Australia and abroad.
Ravi is also the Managing Director of the Cooperative Research Centre for Contamination, Assessment and Remediation of the Environment (CRC CARE), an independent organisation that performs research, develops technologies and provides policy guidance for assessing, cleaning up and preventing contamination of soil, water and air. At the University of Newcastle, Ravi leads the Global Centre for Environmental Remediation (GCER), where he continues to implement his vision to safeguard the environment for future generations.