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Aggregation and adsorption processes of carbonaceous nanoparticles in aqueous environments

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TitleInfo
Title
Aggregation and adsorption processes of carbonaceous nanoparticles in aqueous environments
Name (type = personal)
NamePart (type = family)
Chen
NamePart (type = given)
Chengyu
NamePart (type = date)
1989-
DisplayForm
Chengyu Chen
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Huang
NamePart (type = given)
Weilin
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Weilin Huang
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Mainelis
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Gediminas
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Gediminas Mainelis
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Advisory Committee
Role
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internal member
Name (type = personal)
NamePart (type = family)
Reinfelder
NamePart (type = given)
John
DisplayForm
John Reinfelder
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Takhistov
NamePart (type = given)
Paul
DisplayForm
Paul Takhistov
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
School of Graduate Studies
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2017
DateOther (qualifier = exact); (type = degree)
2017-10
CopyrightDate (encoding = w3cdtf); (qualifier = exact)
2017
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Carbonaceous nanoparticles (NPs), which are intentionally manufactured or originate from incomplete combustion, reach aqueous environments continuously through direct input, surface runoff, wastewater treatment plants, and atmospheric deposition. Upon release into aqueous environments, carbonaceous NPs will likely undergo aggregation and adsorption processes depending on the local solution chemistries and ambient species. Understanding the physiochemical interactions governing these two fundamental processes of carbonaceous NPs is crucial for evaluating their fate, transport, and potential applications in aqueous environments. The first part of this work focused on the aggregation and adsorption behaviors of a new class of manufactured carbonaceous NPs, nanosized activated carbons (NACs), in an effort to evaluate the applicability of NACs as adsorbents to be injected into groundwater systems for remediation purpose. Investigation on aggregation kinetics of four types of NACs demonstrated that, under solution chemistries typical of freshwater environments, NACs should remain stable as dispersed NPs with diameter below 200 nm. Such strong colloidal stability of NACs may enable long distance travel of these NPs to reach target pollutants when injected into groundwater systems. Study on the adsorption processes of NACs for two model aromatic pollutants, 4-chlorophenol (4-CP) and aniline, showed rapid removal of contaminants from water. More importantly, the equilibrium adsorption indicated that the adsorption capacities of NACs were 10-100 times greater than other nanosized adsorbents. The combined strong colloidal stability and adsorption capacity of NACs suggested their potential application as superior adsorbents for groundwater remediation. The second part of this dissertation investigated the aggregation process of soot NPs in aqueous environments. These carbonaceous NPs are produced unintentionally from incomplete combustion, are ubiquitously distributed, and are of serious environmental concerns. Results showed that aggregation kinetics of soot NPs were strongly influenced by solution chemistries including electrolyte compositions and concentrations as well as pH. The presence of macromolecules such as humic acid and proteins significantly enhance the colloidal stability of soot NPs. The aggregation behavior of soot NPs could be predicted by the classic Derjaguin-Landau-Verwey-Overbeek (DLVO) theory using the Hamaker constant determined in this study. Soot NPs should remain stable against aggregation in typical freshwater environments and neutral rain droplets, but are likely to aggregate under saline (e.g., estuaries and oceans) and/or acidic (e.g., acid rain droplets) conditions. Results from this work imply that NACs with strong colloidal stability and high adsorption capacities may enable benign NP design and applications, whereas the toxic soot NPs having such high colloidal stability they could endanger human and environment health. In summary, this dissertation has furthered our understanding of the aggregation and adsorption processes of carbonaceous NPs, which may facilitate the prediction of their fate and transport in aqueous environments.
Subject (authority = RUETD)
Topic
Environmental Sciences
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_8246
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
1 online resource (xxix, 221 p. : ill.)
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Subject (authority = ETD-LCSH)
Topic
Nanoparticles
Subject (authority = ETD-LCSH)
Topic
Adsorption
Subject (authority = ETD-LCSH)
Topic
Macromolecules
Note (type = statement of responsibility)
by Chengyu Chen
RelatedItem (type = host)
TitleInfo
Title
School of Graduate Studies Electronic Theses and Dissertations
Identifier (type = local)
rucore10001600001
Location
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NjNbRU
Identifier (type = doi)
doi:10.7282/T3NC649R
Genre (authority = ExL-Esploro)
ETD doctoral
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Rights

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The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Chen
GivenName
Chengyu
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2017-07-05 23:54:59
AssociatedEntity
Name
Chengyu Chen
Role
Copyright holder
Affiliation
Rutgers University. School of Graduate Studies
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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)
2017-10-31
DateTime (encoding = w3cdtf); (qualifier = exact); (point = end)
2018-10-31
Type
Embargo
Detail
Access to this PDF has been restricted at the author's request. It will be publicly available after October 31st, 2018.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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