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Biosorption of cadmium by biomass of brown marine macroalgae

Biosorption of cadmium by biomass of brown marine macroalgae
Biosorption of cadmium by biomass of brown marine macroalgae
Five different brown seaweeds, Bifurcaria bifurcata, Saccorhiza polyschides, Ascophyllum nodosum, Laminaria ochroleuca and Pelvetia caniculata were studied for their ability to remove cadmium from aqueous solution. Kinetics of cadmium adsorption by all the algae were relatively fast, with 90% of total adsorption occurring in less than I h. These experiments could be accurately described by a pseudo-second-order rate equation, obtaining values between 1.66 x 10-3 and 9.92 x 10-3 g/Mg min for the sorption rate constant k. Several equilibrium adsorption isotherms were obtained for the quantitative description of cadmium uptake. The use of the Langmuir isotherm led to values between 64 and 95 mg/g for qmax and between 0.036 and 0.094 L/mg for b. The effect of pH on biosorption was also studied. Acid-base properties of algae were studied by potentiometry to determine pK values (from 3.54 to 3.98) and the total number of acid groups.
biosorption, cadmium, marine macroalgae, kinetics, equilibrium, acid-base properties
0960-8524
1796-1803
Lodeiro, P.
2a3db327-ecb7-4c32-bc61-13e01aed7182
Cordero, B.
a78cfae4-333c-4173-be50-1f662f8d05bb
Barriada, J.L.
43cc6bf4-e197-4561-ad93-6e30c2d3569a
Herrero, R.
ee7f0139-d8ac-4084-a73e-5eaa91b2e29a
Sastre de Vicente, M.E.
2bd016ef-20cf-4fb4-9282-1ca22142bcb4
Lodeiro, P.
2a3db327-ecb7-4c32-bc61-13e01aed7182
Cordero, B.
a78cfae4-333c-4173-be50-1f662f8d05bb
Barriada, J.L.
43cc6bf4-e197-4561-ad93-6e30c2d3569a
Herrero, R.
ee7f0139-d8ac-4084-a73e-5eaa91b2e29a
Sastre de Vicente, M.E.
2bd016ef-20cf-4fb4-9282-1ca22142bcb4

Lodeiro, P., Cordero, B., Barriada, J.L., Herrero, R. and Sastre de Vicente, M.E. (2005) Biosorption of cadmium by biomass of brown marine macroalgae. Bioresource Technology, 96 (16), 1796-1803. (doi:10.1016/j.biortech.2005.01.002).

Record type: Article

Abstract

Five different brown seaweeds, Bifurcaria bifurcata, Saccorhiza polyschides, Ascophyllum nodosum, Laminaria ochroleuca and Pelvetia caniculata were studied for their ability to remove cadmium from aqueous solution. Kinetics of cadmium adsorption by all the algae were relatively fast, with 90% of total adsorption occurring in less than I h. These experiments could be accurately described by a pseudo-second-order rate equation, obtaining values between 1.66 x 10-3 and 9.92 x 10-3 g/Mg min for the sorption rate constant k. Several equilibrium adsorption isotherms were obtained for the quantitative description of cadmium uptake. The use of the Langmuir isotherm led to values between 64 and 95 mg/g for qmax and between 0.036 and 0.094 L/mg for b. The effect of pH on biosorption was also studied. Acid-base properties of algae were studied by potentiometry to determine pK values (from 3.54 to 3.98) and the total number of acid groups.

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More information

Published date: November 2005
Keywords: biosorption, cadmium, marine macroalgae, kinetics, equilibrium, acid-base properties
Organisations: Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 355099
URI: http://eprints.soton.ac.uk/id/eprint/355099
ISSN: 0960-8524
PURE UUID: d24d07fe-ecb2-42a0-a41c-c73570d36b98

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Date deposited: 30 Jul 2013 13:26
Last modified: 14 Mar 2024 14:29

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Contributors

Author: P. Lodeiro
Author: B. Cordero
Author: J.L. Barriada
Author: R. Herrero
Author: M.E. Sastre de Vicente

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