4.7 Article

Bioavailability for organic chemical bioaccumulation follows the power law

Journal

ENVIRONMENTAL POLLUTION
Volume 288, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2021.117716

Keywords

Bioaccumulation; Bioavailability; Organic chemicals; Invertebrates; Contaminated sites

Funding

  1. National Key Research and Devel-opment Program of China [2019YFC1803803, 2017YFD0800700]
  2. National Natural Science Foundation of China [21976025]
  3. Key Research and Development Program of Liaoning [2019JH2/10300047]
  4. Science & Technology Inno-vation Fund of Dalian [2019J12SN73]
  5. Fundamental Research Funds for the Central Universities [F/4580-1]

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The bioavailability of organic chemical bioaccumulation follows the power law, influenced by the lipid fraction of invertebrates, bulk site concentration of compounds, and organic carbon content of soils/sediments. This law directly links environmental exposures and body burdens of organic chemicals in contaminated sites, offering a method for case-specific risk assessments and regulation of a vast number of organic chemicals and contaminated sites.
Despite the importance of bioavailability for organic chemical bioaccumulation by terrestrial and benthic invertebrates, the principles of bioavailability for organic chemical bioaccumulation remain poorly understood. Here we use large-scale databases with contrasting geographic, compound and organism coverage (from 925 sites, 446 compounds and 184 invertebrate species), and report that bioavailability for organic chemical bioaccumulation follows the power law. It represents that the internal concentration of organic chemicals is the composite power function of the lipid fraction of invertebrates, bulk site concentration of compounds, and organic carbon content of soils/sediments. This law directly links environmental exposures and body burdens of organic chemicals in contaminated sites, and provides a method for enabling case-specific risk assessments of a vast number of organic chemicals and contaminated sites. Our findings may pave the way for translating bioavailability knowledge into risk-oriented regulation of organic chemicals and contaminated sites.

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