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Related Experiment Video

Updated: Feb 7, 2026

A Whole Cell Bioreporter Approach to Assess Transport and Bioavailability of Organic Contaminants in Water Unsaturated Systems
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Bioavailability factor for improved drinking water contaminant exposure risk assessment accuracy.

Yayun Zhang1,2, Shengkun Dong3, Di Zhang1,2

  • 1State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.

Fundamental Research
|February 6, 2026
PubMed
Summary

This study introduces a bioavailability factor (F) to improve drinking water risk assessments. Incorporating F enhances accuracy by accounting for how chemicals are retained in the body, benefiting public health and regulations.

Keywords:
Bioavailability factorBiological retention ratioChemicalsDrinking waterEmerging contaminantRisk assessment

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Area of Science:

  • Environmental Chemistry
  • Toxicology
  • Public Health

Background:

  • Drinking water contains diverse chemical constituents at low concentrations.
  • Current risk assessments primarily use exposure and toxicity data.
  • Limited chemical retention in the body affects assessment accuracy.

Purpose of the Study:

  • To propose incorporating a bioavailability factor (F) into drinking water risk assessments.
  • To enhance the accuracy of chemical-mediated human health risk calculations.
  • To refine regulatory approaches for drinking water contaminants.

Main Methods:

  • Introduced a bioavailability factor (F) representing the ratio of a compound in circulation and excretion.
  • Demonstrated F value application using disinfection by-products (DBPs).
  • Considered multivariable specificity, including exposure route and gender.

Main Results:

  • The bioavailability factor (F) accounts for biological retention ratios.
  • Incorporating F improves the accuracy of human health risk assessments.
  • This approach offers leniency for less bio-retained chemicals.

Conclusions:

  • The proposed bioavailability factor (F) refines drinking water risk assessment.
  • This method has implications for controlling emerging pollutants.
  • Updated national drinking water standards can be informed by this approach.