Study on biofiltration capacity and kinetics of nutrient uptake by Gracilaria cervicornis (Turner) J. Agardh (Rhodophyta, Gracilariaceae)
Rev. bras. farmacogn
; 21(2): 329-333, mar.-abr. 2011. ilus, tab
Article
en En
| LILACS
| ID: lil-590195
Biblioteca responsable:
BR1.1
ABSTRACT
The absorption efficiency and kinetic parameters (Vmax, Ks and VmaxKs) of the seaweed Gracilaria cervicornis for the nutrients NH4+, NO3- and PO4(3-) were evaluated. Absorption efficiency was measured by monitoring nutrient concentrations for 5 h in culture media with initial concentrations of 5, 10, 20 and 30µM. Kinetic parameters were determined by using the Michaelis-Menten formula. Absorption efficiencies for this algae were greater in treatments with lower concentrations, as evidenced by a reduction of 85.3, 97.5 and 81.2 percent for NH4+, NO3- and PO4(3-), respectively. Kinetic parameters show that G. cervicornis exhibits greater ability to take up high concentrations of NH4+ (Vmax=158.5µM g dw-1 h-1) and low concentrations of PO4(3-) (Ks=5µM and VmaxKs=10.3). These results suggest that this algal species has good absorption capacity for the nutrients tested and may be a promising candidate as a bioremediator of eutrophized environments.
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1
Colección:
01-internacional
Base de datos:
LILACS
Idioma:
En
Revista:
Rev. bras. farmacogn
Asunto de la revista:
FARMACIA
Año:
2011
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Brasil