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“Old” and “new” contaminants and their management: learning from the past, looking to the future
Summary
This retrospective review examined how contaminants including microplastics have moved from promising industrial chemicals to environmental concerns over the 50-year history of environmental geochemistry, drawing lessons about early warning signals and regulatory lag that could help identify emerging contaminant risks before they become pervasive.
Within the 50 year lifetime of the Society for Environmental Geochemistry and Health (SEGH), we have seen a number of contaminants transfer from being the wonder chemical of their day through to becoming current contaminants of concern. This is also true for a variety of emerging contaminants such as plastic microbeads, pharmaceutical residues, and fire retardant chemicals, amongst others. This thought piece discusses the risk associated with a range of these emerging contaminants, their global nature, how existing models and frameworks can be applied to deal with their impacts, and research and management gaps and challenges.
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