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This content will become publicly available on October 20, 2018

Title: Uptake Kinetics and Trophic Transfer of Tungsten from Cabbage to a Herbivorous Animal Model

This paper builds on previous studies on military-relevant tungsten (W) to more thoroughly explore environmental pathways and bioaccumulation kinetics during direct soil exposure versus trophic transfer and elucidate its relative accumulation and speciation in different snail organs. The modeled steady-state concentration and bioaccumulation factor (BAF) of W from soil into cabbage were 302 mg/kg and 0.55, respectively. Steady-state concentrations (34 mg/kg) and BAF values (0.05) obtained for the snail directly exposed to contaminated soil were lower than trophic transfer by consumption of W-contaminated cabbage (tissue concentration of 86 mg/kg; BAF of 0.36). Thus, consumption of contaminated food is the most important pathway for W mobility in this food chain. The highest concentrations of W compartmentalization were in the snail’s hepatopancreas based on wet chemistry and synchrotron-based investigations. Chemical speciation via inductively couple plasma mass spectrometry showed a higher degree of polytungstate partitioning in the hepatopancreas relative to the rest of the body. Based on synchrotron analysis, W was incorporated into the shell matrix during exposure, particularly during the regeneration of damaged shell. Finally, this offers the potential for application of the shell as a longer-term biomonitoring and forensics tool for historic exposure.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [4]
  1. U.S. Army Engineer Research and Development Center, Vicksburg, MS (United States)
  2. GHD, Dallas, TX (United States)
  3. Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Mechanical Engineering
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
Publication Date:
Report Number(s):
BNL-203299-2018-JAAM
Journal ID: ISSN 0013-936X
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Environmental Science and Technology
Additional Journal Information:
Journal Volume: 51; Journal Issue: 23; Journal ID: ISSN 0013-936X
Publisher:
American Chemical Society (ACS)
Research Org:
U.S. Army Engineer Research and Development Center, Vicksburg, MS (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC); Army Environmental Quality Technology Basic Research Program (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES
OSTI Identifier:
1425089