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Biosorption of Cadmium by Fucus spiralis

Biosorption of Cadmium by Fucus spiralis
Biosorption of Cadmium by Fucus spiralis
Cadmium biosorption properties of nonliving, dried brown marine macroalga Fucus spiralis from Galician coast (northwest Spain) have been investigated. The biosorption capacity of the alga strongly depends on solution pH; the uptake is almost negligible at pH <= 2 and reaches a plateau at around pH 4.0. Cadmium biosorption kinetics by F. spiralis is relatively fast, with 90\% of total adsorption taking place in less than one hour. A pseudo second order mechanism has been proved to be able to predict the kinetic behaviour of the biosorption process. The effect of initial cadmium ion concentration, alga dose, solution pH, and temperature on the biosorption kinetics has been studied. The Langmuir, Freundlich, Langmuir-Freundlich, and Toth isotherms were used to fit the experimental data and to find out the adsorption parameters. Acid-base properties of the alga have been studied potentiometrically in order to calculate the number of acidic groups and the apparent pK value by using Katchalsky model. The pK obtained is comparable with typical values associated to the ionization of carboxyl groups of alginates, supporting the implication of these groups in the biosorption process.
algae, biosorption, biotechnology, cadmium
1448-2517
180-187
Cordero, Bruno
2fb5d2f0-88b4-45fb-a66f-987dbf3aa73c
Lodeiro, Pablo
f6c1011a-06d0-4095-bc45-2e15e9e492d0
Herrero, Roberto
083bf72e-e314-4edb-86a0-9ba61f35a816
Sastre de Vicente, Manuel Esteban
4b52b4aa-8a1f-4876-b642-101d32f06a4c
Cordero, Bruno
2fb5d2f0-88b4-45fb-a66f-987dbf3aa73c
Lodeiro, Pablo
f6c1011a-06d0-4095-bc45-2e15e9e492d0
Herrero, Roberto
083bf72e-e314-4edb-86a0-9ba61f35a816
Sastre de Vicente, Manuel Esteban
4b52b4aa-8a1f-4876-b642-101d32f06a4c

Cordero, Bruno, Lodeiro, Pablo, Herrero, Roberto and Sastre de Vicente, Manuel Esteban (2004) Biosorption of Cadmium by Fucus spiralis. Environmental Chemistry, 1 (3), 180-187. (doi:10.1071/EN04039).

Record type: Article

Abstract

Cadmium biosorption properties of nonliving, dried brown marine macroalga Fucus spiralis from Galician coast (northwest Spain) have been investigated. The biosorption capacity of the alga strongly depends on solution pH; the uptake is almost negligible at pH <= 2 and reaches a plateau at around pH 4.0. Cadmium biosorption kinetics by F. spiralis is relatively fast, with 90\% of total adsorption taking place in less than one hour. A pseudo second order mechanism has been proved to be able to predict the kinetic behaviour of the biosorption process. The effect of initial cadmium ion concentration, alga dose, solution pH, and temperature on the biosorption kinetics has been studied. The Langmuir, Freundlich, Langmuir-Freundlich, and Toth isotherms were used to fit the experimental data and to find out the adsorption parameters. Acid-base properties of the alga have been studied potentiometrically in order to calculate the number of acidic groups and the apparent pK value by using Katchalsky model. The pK obtained is comparable with typical values associated to the ionization of carboxyl groups of alginates, supporting the implication of these groups in the biosorption process.

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More information

Published date: 2004
Keywords: algae, biosorption, biotechnology, cadmium
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 355103
URI: http://eprints.soton.ac.uk/id/eprint/355103
ISSN: 1448-2517
PURE UUID: c2d17973-6c4b-4afe-a49f-0c0c9b2e3f6e

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Date deposited: 30 Jul 2013 14:18
Last modified: 14 Mar 2024 14:28

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Contributors

Author: Bruno Cordero
Author: Pablo Lodeiro
Author: Roberto Herrero
Author: Manuel Esteban Sastre de Vicente

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