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Persistence_as_a_major_concern.pdf (299.21 kB)
Why is High Persistence Alone a Major Cause of Concern?
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submitted on 05.11.2018 and posted on 06.11.2018by Ian T. Cousins, Carla A. Ng, Zhanyun Wang, Martin Scheringer
persistence (environmental degradation half-lives of several years or more) has important
implications for the behavior of chemicals in the environment. Persistent
chemicals are distributed widely, often globally, and reach (much) higher
concentrations than short-lived chemicals emitted at the same rate. We
illustrate these features of highly persistent chemicals using a unit-world environmental
fate model. Over the last decades, persistent chemicals such as polychlorinated
biphenyls and poly- and perfluoroalkyl substances have caused serious impacts on the environment and human health. We
argue that high persistence should be given particular emphasis in chemicals
assessment and management and that highly persistent chemicals should be
regulated on the basis of their persistence alone (P-sufficient approach)