Extending the Applicability of Compound-Specific Isotope Analysis to Low Concentrations of 1,4 Dioxane
Abstract
The objective of this work was to develop a reliable method to perform compound-specific isotope analysis (CSIA) on low aqueous concentrations (1 g/L) of 1,4-dioxane in groundwater and then apply it to investigate 1,4-dioxane biodegradation. It was determined that 0.5 grams of a synthetic carbonaceous sorbent, when added to a 40 mL vial containing aqueous 1,4-dioxane in the 10 to 100 g/L range, could adsorb more than 99 percent of the 1,4-dioxanefrom solution. The 1,4-dioxane was successfully recovered from the dried solid sorbent by thermal desorption into a gas chromatograph with isotope ratio mass spectrometry. The method was successfully applied to samples at concentrations in the 1 g/L range. It is anticipated that the CSIA method will be applied to demonstrate the biodegradation of 1,4-dioxane in the1-100 g/L range. The method is likely to be adaptable to other contaminants and media (e.g., air and soil), thereby extending the applicability of CSIA to possibly document degradation processes that may be occurring at much lower concentrations in the environment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2017
- Accession Number
- AD1053675
Entities
People
- Aravena Ramon
- P.J. Bennett