The impact of resuspension on sediment mercury dynamics, and methylmercury production and fate: A mesocosm study

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dc.contributor.authorKim, Eun-Hee
dc.contributor.authorMason, Robert P.
dc.contributor.authorPorter, Elka T.
dc.contributor.authorSoulen, Heather L.
dc.date.accessioned2017-06-02T16:14:20Z
dc.date.available2017-06-02T16:14:20Z
dc.date.issued2006
dc.description.abstractThe objective of this study was to investigate the effects of resuspension on the fate and bioaccumulation of mercury (THg) and methylmercury (MeHg) in shallow estuarine environments, using mesocosms. Two 4-week experiments were conducted in July (Experiment 1) and October (Experiment 2) of 2001 with Baltimore Harbor sediments. Hard clams, Mercenaria mercenaria, were introduced into sediments for Experiment 2. Tidal resuspension (4 h on and 2 h off cycles) was simulated, with 3 replicate tanks for each treatment—resuspension (R) and non-resuspension (NR). Sediment cores were collected during the experiments for THg, MeHg, organic content andAVS analyses, and for the determination of methylation/demethylation using Hg stable isotopes (199Hg(II) and CH3 199Hg(II)). Zooplankton samples were collected once a week while clams were taken before and after Experiment 2 for THg and MeHg analyses. Our results suggest that the interplay between Hg methylation and MeHg degradation determines the overall MeHg pool in sediments. Sediment resuspension does not appear to directly impact the Hg transformations but can lead to changes in the association to Hg binding phases, influencing Hg methylation. The bioaccumulation results indicate that sediment resuspension can play an important role in transferring sediment MeHg into organisms.en_US
dc.format.extent17 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/M2JK27
dc.identifier.citationKim, Eun-Hee; Mason, Robert P.; Porter, Elka T.; Soulen, Heather L. (2006) The impact of resuspension on sediment mercury dynamics, and methylmercury production and fate: A mesocosm study. Marine Chemistry 102:300-315.en_US
dc.identifier.urihttp://hdl.handle.net/11603/3949
dc.language.isoen_USen_US
dc.publisherElsevieren_US
dc.relation.isAvailableAtUniversity of Baltimore
dc.subjectMercuryen_US
dc.subjectMethylmercuryen_US
dc.subjectMercury stable isotopesen_US
dc.subjectBioaccumulationen_US
dc.subjectSediment resuspensionen_US
dc.titleThe impact of resuspension on sediment mercury dynamics, and methylmercury production and fate: A mesocosm studyen_US
dc.typeTexten_US

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