Title:
Adsorption, desorption, and steady-state removal of estrogenic hormone 17beta-estradiol by nanofiltration and ultrafiltration membranes

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dc.contributor.advisor Kim, Jae-Hong
dc.contributor.advisor Huang, Ching-Hua
dc.contributor.author McCallum, Edward A. en_US
dc.contributor.committeeMember F. Michael Saunders
dc.contributor.department Civil and Environmental Engineering en_US
dc.date.accessioned 2005-09-16T15:16:18Z
dc.date.available 2005-09-16T15:16:18Z
dc.date.issued 2005-07-20 en_US
dc.description.abstract Nanofiltration (NF) and ultrafiltration (UF) membranes were tested in cross-flow configuration for removal of the natural estrogenic hormone 17Beta-estradiol (E2). The NF membranes, FilmTec NF270 and NF90 and Saehan NE-70 and NE-90, showed significant adsorption of E2 during the initial stage of filtration followed by relatively high steady-state rejection. The rejection ranged from 70% for the NF270 to greater than 97% for the NF90 and NE-90. UF membranes, such as Saehan UE2010 and Sterlitech GH, showed relatively low rejection (0-20 %) at steady-state, but did show significant adsorption during the initial time period. In both NF and UF, adsorbed hormone was released into the permeate stream when the feed solution was replaced with pure water. The rate of desorption was approximately the same as that of adsorption. Similar results were observed at both high concentrations (100 microgram/L), and at lower, environmentally-relevant concentrations (100 ng/L). Fouling of membranes by natural organic matter improved rejection, as did operation at higher permeate flux and higher pH. These results indicate that the high initial rejection of hormones due to adsorption on membranes may not accurately reflect true rejection of hormones by these membranes at steady state. en_US
dc.description.degree M.S. en_US
dc.format.extent 378253 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/7231
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Membranes en_US
dc.subject Hormones
dc.subject Nanofiltration
dc.subject Ultrafiltration
dc.subject Water
dc.subject EDC
dc.subject.lcsh Ultrafiltration en_US
dc.subject.lcsh Nanofiltration en_US
dc.subject.lcsh Membrane separation en_US
dc.subject.lcsh Estrogen en_US
dc.subject.lcsh Endocrine toxicology en_US
dc.title Adsorption, desorption, and steady-state removal of estrogenic hormone 17beta-estradiol by nanofiltration and ultrafiltration membranes en_US
dc.type Text
dc.type.genre Thesis
dspace.entity.type Publication
local.contributor.corporatename School of Civil and Environmental Engineering
local.contributor.corporatename College of Engineering
relation.isOrgUnitOfPublication 88639fad-d3ae-4867-9e7a-7c9e6d2ecc7c
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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