@article{weaver_alexander_cubeta_knappe_aziz_2023, title={Degradation of imidacloprid by Phanerodontia chrysosporium on wood chips for stormwater treatment}, volume={9}, ISSN={["2053-1419"]}, url={https://doi.org/10.1039/D3EW00545C}, DOI={10.1039/d3ew00545c}, abstractNote={The white-rot fungus Phanerodontia chrysosporium degraded more than 50% of imidacloprid in synthetic stormwater in one week, demonstrating the potential of fungal bioremediation for improved contaminant removal in stormwater infrastructure.}, number={12}, journal={ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY}, author={Weaver, Leah M. M. and Alexander, Nancy Lee and Cubeta, Marc A. and Knappe, Detlef R. U. and Aziz, Tarek N.}, year={2023}, month={Nov}, pages={3333–3343} }
 @article{zhang_mcelroy_liberatore_alexander_knappe_2022, title={Stability of Per- and Polyfluoroalkyl Substances in Solvents Relevant to Environmental and Toxicological Analysis br}, volume={56}, ISSN={["1520-5851"]}, url={https://doi.org/10.1021/acs.est.1c03979}, DOI={10.1021/acs.est.1c03979}, abstractNote={Per- and polyfluoroalkyl substances (PFASs) are widely used anthropogenic chemicals. For environmental and toxicological analysis, it is important to understand the stability of PFASs, including novel per- and polyfluoroalkyl ether acids (PFEAs), in commonly used solvents. In this study, we investigated the effects of PFAS characteristics, solvent type, water-to-organic solvent ratio, and temperature on the stability of 21 PFASs including 18 PFEAs. None of the studied PFASs showed measurable degradation in deionized water, methanol, or isopropyl alcohol over 30 days; however, nine PFEAs degraded in the polar aprotic solvents acetonitrile, acetone, and dimethyl sulfoxide (DMSO). PFEA degradation followed first-order kinetics, and first-order rate constants increased with increasing temperature and with decreasing water-to-organic solvent ratio. Monoethers with a carboxylic acid functional group adjacent to a tertiary carbon (>CF-COOH) degraded more rapidly than multiethers in which the carboxylic acid moiety was adjacent to repeating -CF2O- groups. In contrast, monoethers with a carboxylic acid moiety adjacent to a secondary carbon (-CF2-COOH) were stable in all tested solvents. Using high-resolution mass spectrometry, we determined that PFEAs with a >CF-COOH group were stoichiometrically decarboxylated in aprotic solvents and formed products with a >CFH group; e.g., hexafluoropropylene oxide-dimer acid (HFPO-DA or GenX), HFPO-trimer acid, and HFPO-tetramer acid were stoichiometrically converted to Fluoroethers E-1, E-2, and E-3, respectively. PFEA degradation results highlight the importance of solvent choice when preparing dosing solutions and performing extractions for environmental and toxicological assessments of PFEAs.}, number={10}, journal={ENVIRONMENTAL SCIENCE & TECHNOLOGY}, publisher={American Chemical Society (ACS)}, author={Zhang, Chuhui and McElroy, Amie C. and Liberatore, Hannah K. and Alexander, Nancy Lee M. and Knappe, Detlef R. U.}, year={2022}, month={May}, pages={6103–6112} }
 @misc{dodds_alexander_kirkwood_foster_hopkins_knappe_baker_2021, title={From Pesticides to Per- and Polyfluoroalkyl Substances: An Evaluation of Recent Targeted and Untargeted Mass Spectrometry Methods for Xenobiotics}, volume={93}, ISSN={["1520-6882"]}, url={https://doi.org/10.1021/acs.analchem.0c04359}, DOI={10.1021/acs.analchem.0c04359}, abstractNote={Environmental analysis of xenobiotics is a challenging yet necessary undertaking to characterize pollution levels, assess the effectiveness of remediation interventions, and prevent adverse environmental and health outcomes. Xenobiotics are concerning from an environmental perspective due to their chemical persistence, toxicity to humans and wildlife, and prolific use in agricultural and industrial applications.1 Many xenobiotics are persistent organic pollutants (POPs), and the number of POPs listed in the Stockholm Convention is}, number={1}, journal={ANALYTICAL CHEMISTRY}, publisher={American Chemical Society (ACS)}, author={Dodds, James N. and Alexander, Nancy Lee M. and Kirkwood, Kaylie I and Foster, MaKayla R. and Hopkins, Zachary R. and Knappe, Detlef R. U. and Baker, Erin S.}, year={2021}, month={Jan}, pages={641–656} }