Staff View
Kinetics and mechanisms of the precipitation of layered Fe(II)-hydroxides during Fe(II) sorption onto common soil minerals

Descriptive

TitleInfo
Title
Kinetics and mechanisms of the precipitation of layered Fe(II)-hydroxides during Fe(II) sorption onto common soil minerals
Name (type = personal)
NamePart (type = family)
Zhu
NamePart (type = given)
Ying
NamePart (type = date)
1988-
DisplayForm
Ying Zhu
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Elzinga
NamePart (type = given)
Evert
DisplayForm
Evert Elzinga
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Rouff
NamePart (type = given)
Ashaki
DisplayForm
Ashaki Rouff
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)
Axe
NamePart (type = given)
Lisa
DisplayForm
Lisa Axe
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 - Newark
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2017
DateOther (qualifier = exact); (type = degree)
2017-05
CopyrightDate (encoding = w3cdtf); (qualifier = exact)
2017
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
This dissertation studies the formation kinetics and thermodynamics of secondary Fe(II) precipitates during aqueous Fe(II) sorption onto Al and/or Si containing minerals under various lab-based anoxic model systems. In Chapter 2, sorption of Fe(II) in anoxic aqueous suspensions of γ-Al2O3, smectitic clay and amorphous silica was studied under various pH values. In Chapter 3 and 4, the impacts of As and organic compounds on Fe(II) sorption kinetics and mechanisms onto γ-Al2O3 and/or clay were investigated at pH 7.5. Uv-Vis spectroscopy and ICP-OES were employed to determine the aqueous concentrations of Fe, As and Si in the supernatants sampled during the macroscopic batch experiments, while the XAS was applied to characterize the solid-phase Fe and As sorption products. The Fe(II)-Al(III)-LDH formed at pH ≥ 7.0 during Fe(II) sorption onto γ-Al2O3, and at pH 7.0 and 7.5 during Fe(II) sorption onto clay. The poorly crystalline trioctahedral Fe(II)-phyllosilicates formed at pH ≥ 7.5 during Fe(II) sorption onto amorphous silica, and at pH 8.0 during Fe(II) sorption onto clay. Greater sorption rate and extent were observed with increasing pH. Significantly slower Fe(II) sorption kinetics in clay systems compared to γ-Al2O3 and SiO2 is due to the relatively low dissolution of substrate-derived Al and Si. While As(III) did not interfere with the Fe(II)-Al(III)-LDH formation and Fe(II) sorption kinetics onto γ-Al2O3 at pH 7.5, the presence of As(V) slowed down the Fe(II)-Al(III)-LDH formation at low As(V) concentrations, and fully shut it down at high As(V) concentrations, leading to the formation of Fe(II) surface complexes instead. The inhibitive effects of As(V) is attributed to the interference of adsorbed As(V) with the Al needed for Fe(II)-Al(III)-LDH formation. On the other hand, the presence of Fe(II) did not affect the sorption kinetics and mechanisms of As(III) onto γ-Al2O3, however enhanced As(V) sorption rate and extent and did not change the As(V) adsorption mode onto γ-Al2O3. The presence of humic substances (HS) generally hindered the formation of Fe(II)-Al(III)-LDH during Fe(II) sorption onto γ-Al2O3 and clay substrates at pH 7.5. In Fe(II) reacted γ-Al2O3 systems, HS slowed down the formation kinetics of Fe(II)-Al(III)-LDH precipitate. Larger inhibitive impacts of HS were observed when it cosorbed with Fe(II) onto γ-Al2O3 than when it pre-coated onto γ-Al2O3 before Fe(II) sorption. In Fe(II) reacted clay systems, humic acid (HA) coating on clay primarily altered the main Fe(II) sorption product from Fe(II)-Al(III)-LDH into poorly crystalline Fe(II)-phyllosilicate. The effects of HS on Fe(II) sorption onto mineral sorbents were associated with Al dissolution capability from mineral substrates, HS formation of organo-Al complexes and HS masking on mineral surfaces limiting the Al and/or Si needed to form secondary Fe(II) precipitates. The results from this work suggest substantial complexity in the composition and structure of Fe(II) sorption products, and the occurrence of which may represent significant pathways for Fe(II) sequestration under reducing geochemical environments. This work develops our understanding of the fate and transport of Fe(II) under anoxic and suboxic environments such as natural riparian soils and sediments.
Subject (authority = RUETD)
Topic
Environmental Science
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_7963
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
1 online resource (xiii, 125 p. : ill.)
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Subject (authority = ETD-LCSH)
Topic
Geochemistry
Subject (authority = ETD-LCSH)
Topic
Iron
Note (type = statement of responsibility)
by Ying Zhu
RelatedItem (type = host)
TitleInfo
Title
Graduate School - Newark Electronic Theses and Dissertations
Identifier (type = local)
rucore10002600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/T3MS3WQX
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
Zhu
GivenName
Ying
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2017-04-08 19:43:11
AssociatedEntity
Name
Ying Zhu
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - Newark
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.
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
ApplicationName
Microsoft® Word 2016
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
2017-04-08T16:44:54
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
2017-04-08T16:44:54
Back to the top
Version 8.5.5
Rutgers University Libraries - Copyright ©2024