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Plumbojarosite Remediation of Soil Affects Lead Speciation and Elemental Interactions in Soil and in Mice Tissues

Journal Article · · Environmental Science and Technology
 [1];  [2];  [3];  [1];  [4];  [3];  [5];  [6];  [1];  [1]
  1. US Environmental Protection Agency (EPA), Research Triangle Park, NC (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. US Environmental Protection Agency (EPA), Cincinnati, OH (United States)
  4. Engineer Research and Development Center (ERDC), Vicksburg, MS (United States)
  5. Univ. of South Australia, Adelaide, SA (Australia)
  6. Syracuse Research Corporation (SRC), North Syracuse, NY (United States)
Lead (Pb) contamination of soils is of global concern due to the devastating impacts of Pb exposure in children. Because early-life exposure to Pb has long-lasting health effects, reducing exposure in children is a critical public health goal that has intensified research on the conversion of soil Pb to low bioavailability phases. Recently, plumbojarosite (PLJ) conversion of highly available soil Pb was found to decrease Pb relative bioavailability (RBA <10%). However, there is sparse information concerning interactions between Pb and other elements when contaminated soil, pre- and post-remediation, is ingested and moves through the gastrointestinal tract (GIT). Addressing this may inform drivers of effective chemical remediation strategies. In this study, we utilize bulk and micro-focused Pb X-ray absorption spectroscopy to probe elemental interactions and Pb speciation in mouse diet, cecum, and feces samples following ingestion of contaminated soils pre- and post-PLJ treatment. RBA of treated soils was less than 1% with PLJ phases transiting the GIT with little absorption. In contrast, Pb associated with organics was predominantly found in the cecum. These results are consistent with transit of insoluble PLJ to feces following ingestion. The expanded understanding of Pb interactions during GIT transit complements our knowledge of elemental interactions with Pb that occur at higher levels of biological organization.
Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
Argonne National Laboratory (ANL); US Environmental Protection Agency (EPA) Office of Superfund Remediation and Technology Innovation (OSRTI); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357; AC02-76SF00515
OSTI ID:
1876095
Alternate ID(s):
OSTI ID: 1837252
OSTI ID: 1855466
Journal Information:
Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 23 Vol. 55; ISSN 0013-936X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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