Dissolved organic matter within oil and gas associated wastewaters from U.S. unconventional petroleum plays: Comparisons and consequences for disposal and reuse

McDevitt, Bonnie; Jubb, Aaron M.; Varonka, Matthew S.; Blondes, Madalyn S.; Engle, Mark A.; Gallegos, Tanya J.; Shelton, Jennifer L.

doi:10.1016/j.scitotenv.2022.156331

Cited by 9 publications

(1 citation statement)

References 73 publications

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“…EEMs analysis of these leachates indicates that, while both samples leach chromophoric dissolved organic matter (CDOM), the composition of the CDOM is unique to each sample. EEMs spectra of the S3-YELLOW leachate show strong, discrete peaks at an emission wavelength of approximately 300 nm, similar to many O&G wastewaters, and less intense peaks at 420 and 610 nm, while the EEMs spectra of S5-MAGENTA show a broad, low intensity emission profile from approximately 300–600 nm (Figure S4).…”

Section: Resultsmentioning

confidence: 94%

Chemical Composition of Leachates from Hydraulic Fracturing Proppants from Surficial Releases in Southeastern New Mexico

Varonka,

Gregston,

Villalobos

et al. 2024

Environ. Sci. Technol. Lett.

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Resin-coated proppants (RCPs) are used in hydraulic fracturing of oil and gas wells to improve well performance; however, these proppants could be a cause for environmental concern if they are disposed of improperly. In this study, we investigate the water-leachable organic and inorganic constituents from proppants collected from surficial releases of RCPs in southeastern New Mexico. Significant concentrations of nonvolatile dissolved organic matter (>100 mg C/L) and phenolic compounds (>50 mg phenol/L) were identified in one of the proppant leachates, with further gas chromatography−mass spectrometry analysis identifying isomers of bisphenol F, a known endocrine disruptor analogous to bisphenol A, as the main organic constituents within this leachate. Fluorescence excitation−emission matrices analyses of proppant leachates identified several peaks associated with phenolic compounds, similar to previously studied oilfield wastewaters. Precursors of polyurethane production, including the inhalation sensitizer methylene diphenyl diisocyanate, were identified in the leachate from another proppant sample. An understanding of leachable compounds from RCPs is vital to management of environmental contamination from surficial releases, protecting the public and industry workers from associated hazards, and identifying the sources of organic compounds in oilfield wastewaters.

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Section: Resultsmentioning

confidence: 94%