dc.contributor.author	Sanders, James P.
dc.contributor.author	McBurney, Alyssa
dc.contributor.author	Gilmour, Cynthia C.
dc.contributor.author	Schwartz, Grace E.
dc.contributor.author	Washburn, Spencer
dc.contributor.author	Driscoll, Susan B. Kane
dc.contributor.author	Brown, Steven S.
dc.contributor.author	Ghosh, Upal
dc.date.accessioned	2020-01-28T17:18:45Z
dc.date.available	2020-01-28T17:18:45Z
dc.date.issued	2019-11-06
dc.description.abstract	We explored the concept of equilibrium passive sampling for methylmercury (MeHg) using the strategy developedfor hydrophobic organic chemicals. Passive sampling should allow prediction of the concentration of the chemically labilefraction of MeHg in sediment porewaters based on equilibrium partitioning into the sampler, without modeling diffusionrates through the sampler material. Our goals were to identify sampler materials with the potential to mimic MeHg parti-tioning into animals and sediments and provide reversible sorption in a time frame appropriate for in situ samplers. Can-didate materials tested included a range of polymers embedded with suitable sorbents for MeHg. The most promising wereactivated carbon (AC) embedded in agarose, thiol–self‐assembled monolayers on mesoporous supports embedded inagarose, and cysteine‐functionalized polyethylene terephthalate, which yielded log sampler–water partition coefficients of2.8 to 5 for MeHgOH and MeHg complexed with dissolved organic matter (Suwannee River humic acid). Sampler equili-bration time in sediments was approximately 1 to 2 wk. Investigation of the MeHg accumulation mechanism by AC em-bedded in agarose suggested that sampling was kinetically influenced by MeHg interactions with AC particles and notlimited by diffusion through the gel for this material. Also, AC exhibited relatively rapid desorption of Hg and MeHg,indicating that this sorbent is capable of reversible, equilibrium measurements. In sediment:water microcosms, porewaterconcentrations made with isotherm‐calibrated passive samplers agreed within a factor of 2 (unamended sediment) or 4(AC‐amended sediment) with directly measured concentrations. The present study demonstrates a potential new approachto passive sampling of MeHg.Environ Toxicol Chem2020;39:323–334. © 2019 SETAC	en_US
dc.description.sponsorship	The present study was supported byfunding from the Strategic Environmental Research andDevelopment Program–Environmental Security TechnologyCertification Program (ER‐2540), the National Institute of En-vironmental Health Sciences' R01 program (R01ES024284), andThe Dow Chemical Company. We thank J.T. Bell, N. Butera,and A. Soren at the Smithsonian Environmental ResearchCenter for laboratory andfield assistance. Smithsonian Envi-ronmental Research Center Research Experiences for Under-graduates students C. Schuler and M. Sobel contributed to thestudy. Some Berry's Creek samples were collected by L. Brusselof Parsons. Current address of J.P. Sanders is US EnvironmentalProtection Agency, Washington, DC. Current address of A.McBurney is Alcami, Wilmington, North Carolina, USA. Currentaddress of G.E. Schwartz is Environmental Sciences Division,Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA.	en_US
dc.description.uri	https://setac.onlinelibrary.wiley.com/doi/full/10.1002/etc.4631	en_US
dc.format.extent	3 files	en_US
dc.genre	journal articles	en_US
dc.identifier	doi:10.13016/m2fgyk-38nf
dc.identifier.citation	Sanders, James P.; McBurney, Alyssa; Gilmour, Cynthia C.; Schwartz, Grace E.; Washburn, Spencer; Driscoll, Susan B. Kane; Brown, Steven S.; Ghosh, Upal; Development of a Novel Equilibrium Passive Sampling Devicefor Methylmercury in Sediment and Soil Porewaters; Environmental Toxicology and Chemistry—Volume 39, Number 2—pp. 323–334 (2019); https://setac.onlinelibrary.wiley.com/doi/full/10.1002/etc.4631	en_US
dc.identifier.uri	https://doi.org/10.1002/etc.4631
dc.identifier.uri	http://hdl.handle.net/11603/17148
dc.language.iso	en_US	en_US
dc.publisher	Society of Environmental Toxicology and Chemistry	en_US
dc.relation.isAvailableAt	The University of Maryland, Baltimore County (UMBC)
dc.relation.ispartof	UMBC Chemical, Biochemical & Environmental Engineering Department Collection
dc.relation.ispartof	UMBC Faculty Collection
dc.rights	This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rights	Public Domain Mark 1.0	*
dc.rights	This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rights.uri	http://creativecommons.org/publicdomain/mark/1.0/	*
dc.subject	methylmercury	en_US
dc.subject	passive sampling	en_US
dc.subject	sediment	en_US
dc.subject	porewater	en_US
dc.title	Development of a Novel Equilibrium Passive Sampling Devicefor Methylmercury in Sediment and Soil Porewaters	en_US
dc.type	Text	en_US

Development of a Novel Equilibrium Passive Sampling Devicefor Methylmercury in Sediment and Soil Porewaters

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