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Optimization of nickel biosorption by chemically modified brown macroalgae (Pelvetia canaliculata)
Univ Porto, Fac Engn, LSRE, Lab Separat & React Engn,Associate Lab LSRE LCM, P-4200465 Oporto, Portugal .ORCID iD: 0000-0002-3565-9943
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2012 (English)In: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 193, 256-266 p.Article in journal (Refereed) Published
Abstract [en]

In the present work, various forms of algae Pelvetia canaliculata were prepared by different chemical modifications, in order to get the best form of algae for the maximum uptake of nickel. Potentiometric titration revealed that the carboxyl groups were more abundant (3.9 mmol/g) as compared to hydroxyl groups (2.0 mmol/g) on the biosorbent surface. Fourier transform infrared (FUR) analysis of algae was done to identify the role of different functional groups present on algae surface during nickel biosorption. The protonated algae showed least sorption of nickel suggesting that after acid treatment, some of the binding sites were destroyed. Among the various forms of prepared algae. Na-algae prepared directly from raw algae (without protonation) showed highest uptake of nickel. The release of sodium ions during the uptake of nickel ions has shown that the current biosorption mechanism involves ion-exchange being a stoichiometrical ratio of 2:1 between sodium and nickel ions.

Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 193, 256-266 p.
National Category
Earth and Related Environmental Sciences
Research subject
Natural Science, Environmental Science
Identifiers
URN: urn:nbn:se:lnu:diva-20982DOI: 10.1016/j.cej.2012.04.037OAI: oai:DiVA.org:lnu-20982DiVA: diva2:543017
Available from: 2012-08-06 Created: 2012-08-06 Last updated: 2017-12-07Bibliographically approved

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Bhatnagar, Amit

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