Please use this identifier to cite or link to this item: https://doi.org/10.1007/s11270-009-0102-0
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dc.titleAdsorption of natural estrogens and their conjugates by activated sludge
dc.contributor.authorChen, X.
dc.contributor.authorHu, J.
dc.date.accessioned2014-10-08T08:31:44Z
dc.date.available2014-10-08T08:31:44Z
dc.date.issued2010-02
dc.identifier.citationChen, X., Hu, J. (2010-02). Adsorption of natural estrogens and their conjugates by activated sludge. Water, Air, and Soil Pollution 206 (1-4) : 251-261. ScholarBank@NUS Repository. https://doi.org/10.1007/s11270-009-0102-0
dc.identifier.issn00496979
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/87453
dc.description.abstractAdsorption to biomass is a key mechanism which results in the elimination of natural estrogens and their conjugates from sewage. Freundlich model showed that the adsorption capacities of estrone and 17β-estradiol to activated sludge were the highest at neutral pH. The lower capacities at pH 2 and 11.5 could be due to the competition of sludge adsorption sites by cations or electrostatic repulsion from particles of similar charges. The lowest adsorption capacity at pH 11.5 was attributable to electrostatic repulsion, and the highest capacity at pH 2 might be due to the increased sulfate adsorbability. For estrogen conjugates such as estrone-3-sulfate and 17β-estradiol-3- sulfate, adsorption performances were similar at pH 5, 7, and 9. It was observed that mean values of log KD were 2.78, 2.61, 1.67, and 1.94 l kg TSS-1; log KOM were 2.96, 2.79, 1.77, and 2.04 l kg VSS-1 and those of log K OC were 3.31, 3.12, 2.21, and 2.46 l kg OC-1 for estrone, 17β-estradiol, estrone-3-sulfate, and 17β-estradiol-3-sulfate, respectively. © 2009 Springer Science+Business Media B.V.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1007/s11270-009-0102-0
dc.sourceScopus
dc.subjectActivated sludge
dc.subjectAdsorption isotherm
dc.subjectConjugates
dc.subjectEstrogens
dc.subjectPH effect
dc.typeArticle
dc.contributor.departmentDIVISION OF ENVIRONMENTAL SCIENCE & ENGG
dc.description.doi10.1007/s11270-009-0102-0
dc.description.sourcetitleWater, Air, and Soil Pollution
dc.description.volume206
dc.description.issue1-4
dc.description.page251-261
dc.description.codenWAPLA
dc.identifier.isiut000273755500021
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