Zinc and cadmium removal by biosorption on Undaria pinnatifida in batch and continuous processes.
Abstract: Zn(II) and Cd(II) removal by biosorption using Undaria pinnatifida was studied in batch and dynamic systems. The kinetic uptake follows a pseudo second order rate equation indicating that the rate limiting step is a chemical reaction. The equilibrium data are described by the Langmuir isot...
| Publicado en: | Journal of Environmental Management Vol. 129; pp. 423 - 435 |
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| Autores principales: | , , , |
| Formato: | Artículo |
| Publicado: |
Academic Press Inc.
Nov2013
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=91100693&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 91100693 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 03014797 EMJ jtl: Journal of Environmental Management issn: 03014797 maglogo: N pubinfo: dt: Nov2013 vid: 129 pid: 735 pub: Academic Press Inc. artinfo: ui: 91100693 10.1016/j.jenvman.2013.07.011 ppf: 423 ppct: 12 formats: tig: atl: Zinc and cadmium removal by biosorption on Undaria pinnatifida in batch and continuous processes. aug: au: Plaza Cazón, J. Viera, M. Donati, E. Guibal, E. affil: Centro de Investigación y Desarrollo en Fermentaciones Industriales, CINDEFI (CCT CONICET La Plata, UNLP), Facultad de Ciencias Exactas, 50 y 115, 1900 La Plata, Argentina su: Undaria pinnatifida Continuous processing Batch processing Sorption Zinc Cadmium Chemical reactions sug: subj: Metal service centres Undaria pinnatifida Continuous processing Batch processing Sorption Zinc Cadmium Chemical reactions keyword: Biosorption Fixed bed column Heavy metals Water treatment Biosorption Fixed bed column Heavy metals Water treatment ab: Abstract: Zn(II) and Cd(II) removal by biosorption using Undaria pinnatifida was studied in batch and dynamic systems. The kinetic uptake follows a pseudo second order rate equation indicating that the rate limiting step is a chemical reaction. The equilibrium data are described by the Langmuir isotherm in mono-component solutions. In binary solutions, the Jain and Snowyink model shows that most of the active sites are exclusively accessible to cadmium ions without competition with the zinc ions. The dynamic studies show that the biosorbent has higher retention and affinity for Cd(II) than for Zn(II) in both mono- and bi-component systems. SEM-EDX analysis indicates that the active sites are heterogeneously distributed on the cell wall surface. FT-IR spectrometry characterization shows that carboxylic groups and chemical groups containing N and S contribute to Zn(II) and Cd(II) uptake by U. pinnatifida. According to these results calcium-treated U. pinnatifida is a suitable adsorbent for Zn(II) and Cd(II) pollutants. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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