Linked Life Data

17988838

Source:http://linkedlifedata.com/resource/pubmed/id/17988838

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2008-2-5
pubmed:abstractText
Extracellular polymeric substances (EPS) of sludge play an important role in the adsorption of organic pollutants in wastewater biological treatments. Experiments were conducted to characterize the adsorption properties of EPS extracted from aerobic sludge (AE-EPS) and anaerobic sludge (AN-EPS) using a dye-probing method in this study. A model cationic dye, Toluidine blue (TB), was used as the dye probe. The adsorption of dye onto EPS to produce a dye-EPS complex would cause a change in the solution absorbance, attributed to the difference between the visible spectra of the dye and dye-EPS complex. From the change in the absorbance, the equilibrium absorption capability of EPS could be evaluated. Results indicate that Langmuir adsorption isotherm was able to adequately describe the adsorption equilibrium of TB onto both EPS at various pH values. From the Langmuir adsorption isotherm, the maximum binding capabilities were calculated to be 1.9 and 2.5 mmol/g EPS for AE-EPS at pH 7.0 and 11.0, and 1.6 and 1.9 mmol/g EPS for AN-EPS at pH 7.0 and 11.0, respectively. The first-order rate constants were calculated to be 0.033 and 0.35 min(-1) for AE-EPS at pH 7.0 and 11.0, and 0.069 and 0.18 min(-1) for AN-EPS at pH 7.0 and 11.0, respectively. The results of the present study demonstrated that the dye-probing method was appropriate for investigating the adsorption process of EPS in aqueous solution.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0927-7765
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
62
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
83-90
pubmed:dateRevised
2009-10-16
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Characterization of adsorption properties of extracellular polymeric substances (EPS) extracted from sludge.
pubmed:affiliation
School of Chemistry, University of Science & Technology of China, Hefei, Anhui, China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't