dc.contributor.advisor |
Deshusses, Marc A |
|
dc.contributor.author |
Gao, Yaohuan |
|
dc.date.accessioned |
2010-05-13T17:55:09Z |
|
dc.date.available |
2010-05-13T17:55:09Z |
|
dc.date.issued |
2010 |
|
dc.identifier.uri |
https://hdl.handle.net/10161/2510 |
|
dc.description.abstract |
<p>Powdered Activated Carbon (PAC) adsorption was studied in order to determine the
influence of natural organic matter (NOM) on the adsorption of two acidic pharmaceutically
active compounds (PhACs), clofibric acid and ketoprofen. Suwannee River humic acids
(SRHAs) was used as substitute of NOM in natural water. Batch adsorption experiments
were conducted to obtain the single compound adsorption kinetics and adsorption isotherm
with and without SRHAs in the system. Three main findings resulted from this study.
First, the adsorption isotherms showed that the adsorption of clofibric acid was not
significantly affected in the presence of SRHAs (5 ppm); however, the adsorption of
ketoprofen markedly decreased with SRHAs in the solutions. Higher initial concentrations
of clofibric acid than ketoprofen together with the compressed double layer theory
helped explain the different behaviors that were observed. Furthermore, the more hydrophobic
ketoprofen molecules may increase the possibility that this compound would adsorb
less on the surface area which was covered by the more hydrophilic humic acids. Second,
the adsorption kinetics of both compounds were not affected by the SRHAs, although
more research may be needed, as it is possible that slight differences exist during
the initial adsorption phase. Lastly, possible intermolecular forces were discussed
and a sequence of importance is proposed for their role in the adsorption process
as A). electrostatic forces; B). electron donor-acceptor interaction; C & D). H-bond
and London Dispersion forces.</p>
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dc.format.extent |
1076451 bytes |
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dc.format.mimetype |
application/pdf |
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dc.language.iso |
en_US |
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dc.subject |
Engineering, Environmental |
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dc.subject |
humic acids |
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dc.subject |
pharmaceutically active compound |
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dc.subject |
powdered activated carbon |
|
dc.title |
Adsorption of Pharmaceutically Active Compounds (PhACs) by Powdered Activated Carbon
from Natural Water --Influence of Natural Organic Matter (NOM)
|
|
dc.type |
Master's thesis |
|
dc.department |
Civil and Environmental Engineering |
|