Please use this identifier to cite or link to this item: https://doi.org/10.1021/la047349a
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dc.titleFungal biomass with grafted poly(acrylic acid) for enhancement of Cu(II) and Cd(II) biosorption
dc.contributor.authorDeng, S.
dc.contributor.authorTing, Y.P.
dc.date.accessioned2014-10-09T06:48:39Z
dc.date.available2014-10-09T06:48:39Z
dc.date.issued2005-06-21
dc.identifier.citationDeng, S., Ting, Y.P. (2005-06-21). Fungal biomass with grafted poly(acrylic acid) for enhancement of Cu(II) and Cd(II) biosorption. Langmuir 21 (13) : 5940-5948. ScholarBank@NUS Repository. https://doi.org/10.1021/la047349a
dc.identifier.issn07437463
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/88987
dc.description.abstractThe biomass of Penicillium chrysogenum was modified by graft polymerization of acrylic acid (AAc) on the surface of ozone-pretreated biomass. The sorption capacity for copper and cadmium increased significantly as a large number of carboxyl groups were present on the biomass surface, especially when the carboxylic acid group was converted to carboxylate ions using NaOH. When modeled using the Langmuir isotherm, the sorption capacities were 1.70 and 1.87 mmol g -1 for copper and cadmium, respectively. The loaded biosorbent was regenerated using HC1 solution and used repeatedly over five cycles with little loss of uptake capacity beyond the second cycle. The sorption of the two metals was time-dependent, and the kinetics fitted the pseudo-second-order equation well. The Freundlich, Langmuir, Temkin, and Dubinin-Redushkevich isotherms were used to model the metal sorption isotherms, and the thermodynamic parameters calculated show that the sorption was spontaneous and endothermic under the condition applied and that the biomass has similar sorption affinities for the two metals. Fourier transform infrared and X-ray photoelectron spectroscopy reveal that carboxyl, amide, and hydroxyl groups on the biomass surface were involved in the sorption of copper and cadmium and ion exchange and complexation dominated the sorption process. © 2005 American Chemical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1021/la047349a
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.description.doi10.1021/la047349a
dc.description.sourcetitleLangmuir
dc.description.volume21
dc.description.issue13
dc.description.page5940-5948
dc.description.codenLANGD
dc.identifier.isiut000229886300046
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