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The Bioaccessibility of Lead (Pb) from Vacuumed House Dust on Carpets in Urban Residences

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  • Chang Ho Yu
  • Lih‐Ming Yiin
  • Paul J. Lioy

Abstract

Risk assessments for toxicants in environmental media via oral exposure often rely on measurements of total concentration in a collected sample. However, the human digestive system cannot dissolute all of a toxicant present in the binding matrix, and cannot absorb it with nearly 100% efficiency. In vitro bioaccessibility has been developed as a method to estimate oral bioavailability of a toxicant using a physiologically‐based extraction procedure. Bioaccessibility measurements are more physiologically relevant than strong acid leaching measurements of concentration. A method for measuring bioaccessible lead in house dust was derived from the bioaccessibility method currently used for heavy metals in contaminated soils. House dust was collected from carpets in typical urban residences. Bioaccessible lead was measured in house dust (

Suggested Citation

  • Chang Ho Yu & Lih‐Ming Yiin & Paul J. Lioy, 2006. "The Bioaccessibility of Lead (Pb) from Vacuumed House Dust on Carpets in Urban Residences," Risk Analysis, John Wiley & Sons, vol. 26(1), pages 125-134, February.
    • Handle: RePEc:wly:riskan:v:26:y:2006:i:1:p:125-134
    DOI: 10.1111/j.1539-6924.2006.00710.x
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    1. Lanphear, B.P. & Michael Weitzman, M.D. & Winter, N.L. & Eberly, S. & Yakir, B. & Tanner, M. & Emond, M. & Matte, T.D., 1996. "Lead-contaminated house dust and urban children's blood lead levels," American Journal of Public Health, American Public Health Association, vol. 86(10), pages 1416-1421.
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