Staff View
Mercury stable isotope approaches to the study of monomethylmercury in the environment

Descriptive

TitleInfo
Title
Mercury stable isotope approaches to the study of monomethylmercury in the environment
Name (type = personal)
NamePart (type = family)
Janssen
NamePart (type = given)
Sarah Elizabeth
NamePart (type = date)
1989-
DisplayForm
Sarah Elizabeth Janssen
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Reinfelder
NamePart (type = given)
John R
DisplayForm
John R Reinfelder
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Barkay
NamePart (type = given)
Tamar
DisplayForm
Tamar Barkay
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Yee
NamePart (type = given)
Nathan
DisplayForm
Nathan Yee
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Blum
NamePart (type = given)
Joel D
DisplayForm
Joel D Blum
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
Graduate School - New Brunswick
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2016
DateOther (qualifier = exact); (type = degree)
2016-05
CopyrightDate (encoding = w3cdtf); (qualifier = exact)
2016
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Mercury stable isotopes provide additional insights into the biogeochemical cycling of mercury, but the isotopic composition of MeHg in the environment is understudied. The overall objective of this work was to examine the mercury isotopic composition of MeHg in the microorganisms (anaerobic bacteria) and environmental matrices (anoxic sediment) in which it is formed, in order to understand what controls the isotopic composition of MeHg in aquatic systems. A system for the quantitative separation of MeHg for isotope analysis that did not cause fractionation of mercury isotopes was built and tested (Chapter 2). Methylmercury from estuarine sediments had 202Hg values that varied from −0.41 to +0.41‰ and were generally higher, and spatially and temporally more variable, than those for total Hg (−0.21 to −0.48‰). This work provided a reproducible and precise method for measuring MeHg isotopes in complex matrices and also represents the first high precision isotope measurement of MeHg in sediments. The mercury isotopic composition of MeHg was estimated in fish tissue and compared to sediment MeHg measurements in order to gain insight about feeding locality of white perch and killifish species (Chapter 3). Localized estuarine fish showed similarities between the isotopic composition of MeHg in their tissue and sediment from their capture location. Migratory species were isotopically heavier than sediment MeHg, indicating different feeding areas or mercury sources. This study provides mercury stable isotope data on estuarine species and an improved estimation for isotopic composition of MeHg in fish tissue to aid in source tracking applications. Mercury isotope fractionation factors during microbial mercury methylation were determined in pure cultures of a sulfate-reducing and an iron-reducing bacterium (Chapter 4). Both bacteria had similar fractionation factors despite differences in methylation rates. The mercury stable isotope composition (202Hg) of MeHg produced by these organisms eventually exceeded that of the initial Hg(II) provided, indicating that the organisms accessed an intra- or extracellular pool of Hg that was enriched in 202Hg. This study is the first to establish both a fractionation factor for methylation in an iron-reducing bacterium and observe an isotopically-enriched pool of bioavailable Hg(II).
Subject (authority = RUETD)
Topic
Environmental Sciences
Subject (authority = ETD-LCSH)
Topic
Mercury--Isotopes
Subject (authority = ETD-LCSH)
Topic
Mercury--Environmental aspects
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_7090
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
1 online resource (xi, 143 p. : ill.)
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Sarah Elizabeth Janssen
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/T3J67K35
Genre (authority = ExL-Esploro)
ETD doctoral
Back to the top

Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Janssen
GivenName
Sarah
MiddleName
Elizabeth
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2016-03-29 18:18:06
AssociatedEntity
Name
Sarah Janssen
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
RightsEvent
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2016-05-31
DateTime (encoding = w3cdtf); (qualifier = exact); (point = end)
2016-11-30
Type
Embargo
Detail
Access to this PDF has been restricted at the author's request. It will be publicly available after November 30th, 2016.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
Back to the top

Technical

RULTechMD (ID = TECHNICAL1)
ContentModel
ETD
OperatingSystem (VERSION = 5.1)
windows xp
CreatingApplication
Version
1.5
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
2016-04-13T15:31:30
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
2016-04-13T15:31:30
ApplicationName
Acrobat Distiller 10.1.15 (Windows)
Back to the top
Version 8.5.5
Rutgers University Libraries - Copyright ©2024