Developing earthworm bioconcentration factors of nitrogen-based compounds for predicting environmentally significant parameters for new munition compounds in soil

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DOIResolve DOI: http://doi.org/10.1016/j.apsoil.2015.11.008
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TypeArticle
Proceedings titleApplied Soil Ecology
ConferenceThe 10th International Symposium on Earthworm Ecology (ISEE-10), June 22-27, 2014, Athens, Georgia, USA
ISSN0929-1393
Volume104
Pages2530
Subjectmunition compounds; bioconcentration; toxicity; earthworms
AbstractWe investigated the bioconcentration potential of nitrogen-based compounds 4-nitroanisole (4-NAN), 3,5-dinitro-o-toluamide (3,5-DNoTAME), and 2-methoxy-5 nitropyridine (2-M-5-NPYNE) using earthworm Eisenia andrei exposures in aqueous exposure media in sand. Separate toxicity studies were conducted prior to bioconcentration studies using a range of chemical concentrations to establish the sublethal exposure conditions for the earthworms. The objectives of the present studies were to: (1) develop an experimental test system for estimating bioconcentration potentials of new and emerging munition compounds that partition into earthworms, using aqueous exposure media; and (2) apply this experimental model to establish original bioconcentration data for 4-NAN, 3,5-DNoTAME, and 2-M-5-NPYNE. Experimental design includes earthworm exposures to chemicals for up to 14 days in aqueous media (Römbke medium; 0.08 mM KCl, 2 mM CaCl₂, 0.5 mM MgSO₄, and 0.8 mM NaHCO₃) in the presence of water-washed coarse sand (0.5–1.0 mm) substrate. Concentrations of test chemicals in respective exposure media remained relatively stable during these independent studies. Tissue analyses revealed a rapid uptake of each chemical by the earthworms; a steady state was attained within 24 h from commencement of these exposures. Estimated steady-state bioconcentration factors (BCFss; mL/g dry tissue) were 47, 6, and 11 for 4-NAN, 3,5-DNoTAME, and 2-M-5-NPYNE, respectively. These results will contribute to the BCF database being developed for use in models aimed at predicting environmentally significant parameters for new munition compounds in soil.
Publication date
PublisherElsevier B.V.
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
IdentifierS0929139315301244
NPARC number23000017
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Record identifier66a9b1c3-0e5c-4b6f-ac84-327cd3e60917
Record created2016-05-19
Record modified2016-08-19
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