Study on biofiltration capacity and kinetics of nutrient uptake by Gracilaria cervicornis (Turner) J. Agardh (Rhodophyta, Gracilariaceae)

Revista Brasileira de Farmacognosia

Carneiro, Marcella A. A.¹  Freire, Fúlvio Aurélio de M.¹  Marinho-Soriano, Eliane¹  Universidade Federal do Rio Grande do Norte, Brazil¹ 

关键词: Gracilaria;    nutrient uptake;    macroalgae;   

DOI  :  10.1590/S0102-695X2011005000074

来源: Sociedade Brasileira de Farmacognosia

【 摘 要 】

The absorption efficiency and kinetic parameters (Vmax, Ks and Vmax:Ks) of the seaweed Gracilaria cervicornis for the nutrients NH4+, NO3- and PO43- 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% for NH4+, NO3- and PO43-, respectively. Kinetic parameters show that G. cervicornis exhibits greater ability to take up high concentrations of NH4+ (Vmax=158.5µM gdw-1 h-1) and low concentrations of PO43- (Ks=5µM and Vmax:Ks=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.

【 授权许可】

Unknown