The bioaccessibility of soil-based mercury as determined by physiological based extraction tests and human biomonitoring in children

The Science of the Total Environment
Adam M SafrukElliot A Sigal

Abstract

Environmental contaminants associated with soil particles are generally less bioavailable than contaminants associated with other exposure media where chemicals are often found in more soluble forms. In vitro methods, such as Physiological Based Extraction Tests (PBET), can provide estimates of bioaccessibility for soil-based contaminants. The results of these tests can be used to predict exposure to contaminants from soil ingestion pathways within human health risk assessment (HHRA). In the current investigation, an HHRA was conducted to examine the risks associated with elevated concentrations of mercury in soils in the northern Canadian smelter community of Flin Flon, Manitoba. A PBET was completed for residential soils and indicated mean bioaccessibilities of 1.2% and 3.0% for total mercury using gastric phase and gastric+intestinal phase methodologies, respectively. However, as many regulators only allow for the consideration of in vitro results for lead and arsenic in the HHRA process, in vitro bioaccessibility results for mercury were not utilized in the current HHRA. Based on the need to assume 100% bioaccessibility for inorganic mercury in soil, results from the HHRA indicated the need for further assessment of exposur...Continue Reading

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Citations

Mar 24, 2015·PloS One·Olivier ManenStéphanie Montmerle-Borgdorff
Apr 6, 2017·Environmental Science and Pollution Research International·Safaa A KadhumRohasliney Binti Hashim
Jun 27, 2018·International Journal of Environmental Research and Public Health·David ImoStefanie Muff
Oct 10, 2015·Environmental Monitoring and Assessment·Iman Al-SalehMichael Nester
Jul 25, 2020·Journal of Hazardous Materials·Lin JiangMaosheng Zhong
Sep 23, 2020·Chemosphere·Isabela C F VasquesJoão José Marques

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