@article{b102e14e091a4b729e889ab2ec993bbd,
title = "Impact of bromide exposure on natural organochlorine loss from coastal wetland soils in the Winyah Bay, South Carolina",
abstract = "Naturally formed halogenated organic compounds are common in terrestrial and marine environments and play an important role in the halogen cycle. Among these halogenated compounds, chlorinated organic compounds are the most common halogenated species in all soils and freshwater sediments. This study evaluated how a previously observed phenomenon of bromination of organic matter in coastal soils due to salt-water intrusion impacts the stability and fate of natural organochlorine (org-Cl) in coastal wetland soils. The reacted solid and liquid samples were analyzed using X-ray spectroscopy (in cm and at micron scales for solids) and ion chromatography. We find that introduction of Br- species and their subsequent reactions with organic carbon are associated with an average of 39% loss of org-Cl species from leaf litter and soil. The losses are more prominent in org-Cl hotspots of leaf litter, and both aliphatic and aromatic organochlorine compounds are lost from all samples at high Br- concentrations. The combination of solid and aqueous phase analysis suggests that org-Cl loss is most likely largely associated with volatilization of org-Cl. Release of labile org-Cl compounds has detrimental environmental implications for both ecosystem toxicity, and stratospheric ozone. The reactions similar to those observed here can also have implications for the reactions of xenobiotic chlorinated compounds in soils.",
author = "Schlesinger, {Danielle R.} and Myneni, {Satish C.B.}",
note = "Funding Information: We thank Renxing Liang and the Onstott Group at the Department of Geosciences at Princeton University for their assistance with and use of their ion chromatograph. This research is funded by the National Science Foundation Graduate Research Fellowships Program (DS), the National Science Foundation Geobiology (grant #1529956 to SM), and Chemical Sciences (grant #1609927 to SM), the Phillips Equipment Fund from the Department of Geosciences at Princeton University, and the Princeton Environmental Institute Walbridge Fund Graduate Award. We would like to thank Dr Chow at Clemson University for providing some of the samples examined in this study. We thank the beamline scientists and staff from the Stanford Synchrotron Radiation Lightsource, the Advanced Photon Source, and the National Synchrotron Radiation Lightsource II for their help with the setting up of the stations. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences under contract no. DE-AC02-76SF00515. This research used resources of the Advanced Photon Source, a US Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under contract no. DE-AC02-06CH11357. We acknowledge the support of GeoSoilEnviroCARS (Sector 13), which is supported by the National Science Foundation – Earth Sciences (EAR-1128799), and the Department of Energy, Geosciences (DE-FG02-94ER14466). This research used beamline 5-ID (SRX) of the National Synchrotron Light Source II, a U. S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under contract no. DESC0012704. Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",
year = "2020",
month = mar,
doi = "10.1039/c9em00604d",
language = "English (US)",
volume = "22",
pages = "642--652",
journal = "Environmental Science: Processes and Impacts",
issn = "2050-7887",
publisher = "Royal Society of Chemistry",
number = "3",
}