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The Resource Particle mediated enhanced mass transfer of diethylhexyl phthalate : A pilot scale system design, by Melissa Buechlein

Particle mediated enhanced mass transfer of diethylhexyl phthalate : A pilot scale system design, by Melissa Buechlein

Creator
Author
Summary
"Phthalates are a class of SVOCs that are widely used as plasticizers and recently epidemiological and toxicological research has found a link between phthalate exposure and increased occurrences of adverse health effects. SVOCs can potentially partition into household dust and airborne particles. Models and micro chamber studies have identified that airborne particles effectively increase SVOC deposition to or emissions from surfaces; SVOCs partition to aerosols in the bulk air, the aerosols then migrate to the surfaces due to eddy and Brownian motion, and then the SVOCs is released inside the SVOC concentration boundary layer adjacent to the surface. Concentration boundary layers limit mass transfer to and from surfaces, but particle mediation of SVOCs effectively decreases this layer thickness, resulting in an increase of the effective mass transfer coefficient. This project focuses on the design and validation of a pilot scale system that will ultimately be used to test model predictions describing this phenomenon. To meet the requirements of the model, there are several requirements: (1) successful generation and characterization of polydisperse particles with an aerodynamic diameter of 10-500 nm at concentrations of 50-100 [mu]g/m3, (2) quantify the deposition flux of aerosol particles to ensure the particle bound fraction of DEHP will contribute to less than 10% of DEHP flux relative to that due to gas-phase deposition, and (3) quantify the deposition flux of DEHP with a 95% confidence interval less than 30% of magnitude of the flux. The designed system does not meet requirement (2), but does meet requirements (1) and (3). Further work to reduce the particle deposition will need to be done before the system is ready to examine the hypothesis of particle mediation"--Abstract, page iii
Language
eng
Work
Instance
Label
Particle mediated enhanced mass transfer of diethylhexyl phthalate : A pilot scale system design
Title
Particle mediated enhanced mass transfer of diethylhexyl phthalate
Title remainder
A pilot scale system design
Statement of responsibility
by Melissa Buechlein
Creator
Author
Subject
Language
eng
Summary
"Phthalates are a class of SVOCs that are widely used as plasticizers and recently epidemiological and toxicological research has found a link between phthalate exposure and increased occurrences of adverse health effects. SVOCs can potentially partition into household dust and airborne particles. Models and micro chamber studies have identified that airborne particles effectively increase SVOC deposition to or emissions from surfaces; SVOCs partition to aerosols in the bulk air, the aerosols then migrate to the surfaces due to eddy and Brownian motion, and then the SVOCs is released inside the SVOC concentration boundary layer adjacent to the surface. Concentration boundary layers limit mass transfer to and from surfaces, but particle mediation of SVOCs effectively decreases this layer thickness, resulting in an increase of the effective mass transfer coefficient. This project focuses on the design and validation of a pilot scale system that will ultimately be used to test model predictions describing this phenomenon. To meet the requirements of the model, there are several requirements: (1) successful generation and characterization of polydisperse particles with an aerodynamic diameter of 10-500 nm at concentrations of 50-100 [mu]g/m3, (2) quantify the deposition flux of aerosol particles to ensure the particle bound fraction of DEHP will contribute to less than 10% of DEHP flux relative to that due to gas-phase deposition, and (3) quantify the deposition flux of DEHP with a 95% confidence interval less than 30% of magnitude of the flux. The designed system does not meet requirement (2), but does meet requirements (1) and (3). Further work to reduce the particle deposition will need to be done before the system is ready to examine the hypothesis of particle mediation"--Abstract, page iii
Member of
Cataloging source
UMR
http://library.link/vocab/creatorName
Buechlein, Melissa
Degree
M.S.
Dissertation year
2016
Granting institution
Missouri University of Science and Technology
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
  • theses
http://library.link/vocab/subjectName
  • Diethylhexyl phthalate
  • Diethylhexyl phthalate
  • Phthalate esters
Label
Particle mediated enhanced mass transfer of diethylhexyl phthalate : A pilot scale system design, by Melissa Buechlein
Instantiates
Publication
Note
Vita
Bibliography note
Includes bibliographic references (pages 59-66)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
952591699
Extent
1 online resource (x, 67 pages)
Form of item
online
Governing access note
These materials are protected under copyright by the original author
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations (some colored).
Specific material designation
remote
System control number
(OCoLC)952591699
Label
Particle mediated enhanced mass transfer of diethylhexyl phthalate : A pilot scale system design, by Melissa Buechlein
Publication
Note
Vita
Bibliography note
Includes bibliographic references (pages 59-66)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
952591699
Extent
1 online resource (x, 67 pages)
Form of item
online
Governing access note
These materials are protected under copyright by the original author
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations (some colored).
Specific material designation
remote
System control number
(OCoLC)952591699

Subject

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