Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.colsurfb.2009.10.031
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dc.titleSequestration of Reactive Blue 4 by free and immobilized Bacillus subtilis cells and its extracellular polysaccharides
dc.contributor.authorBinupriya, A.R.
dc.contributor.authorSathishkumar, M.
dc.contributor.authorKu, C.S.
dc.contributor.authorYun, S.-I.
dc.date.accessioned2014-10-07T06:27:50Z
dc.date.available2014-10-07T06:27:50Z
dc.date.issued2010-03-01
dc.identifier.citationBinupriya, A.R., Sathishkumar, M., Ku, C.S., Yun, S.-I. (2010-03-01). Sequestration of Reactive Blue 4 by free and immobilized Bacillus subtilis cells and its extracellular polysaccharides. Colloids and Surfaces B: Biointerfaces 76 (1) : 179-185. ScholarBank@NUS Repository. https://doi.org/10.1016/j.colsurfb.2009.10.031
dc.identifier.issn09277765
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/84668
dc.description.abstractBacillus subtilis a gram positive bacteria and its extracellular polysaccharide were used in free form as well as immobilized form as biosorbent for sequestration of an anionic dye, Reactive Blue 4 (RB) in aqueous phase. The dye uptake enhanced with decrease in pH. Extracellular polymeric substances (EPS) and free cells were found to be better adsorbents when compared to alginate immobilized cells (IC) and EPS (IEPS). The presence of functional groups in free cells and EPS was confirmed by FT-IR analysis. Immobilization resulted in poor adsorption performance due to increase in mass transfer resistance by the polymeric matrix. High Qmax and b values were noted in the case of free cells and free EPS in contrast to IC and IEPS. From the kinetic experiments, the adsorption system was found to be a pseudo-first-order reaction at low dye concentration. Desorption of RB was found to be 100% in 1N NaOH. However, the alginate beads were found to be unstable under high alkaline conditions of NaOH. © 2009 Elsevier B.V. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.colsurfb.2009.10.031
dc.sourceScopus
dc.subjectBacillus subtilis
dc.subjectBiosorption
dc.subjectExtracellular polysaccharide
dc.subjectImmobilization
dc.subjectReactive Blue 4
dc.typeArticle
dc.contributor.departmentCIVIL ENGINEERING
dc.description.doi10.1016/j.colsurfb.2009.10.031
dc.description.sourcetitleColloids and Surfaces B: Biointerfaces
dc.description.volume76
dc.description.issue1
dc.description.page179-185
dc.description.codenCSBBE
dc.identifier.isiut000274767300027
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