Titre :	Accumulation and bodegradation of phenanthrene and fluoranthene by the algae enriched from a mangrove aquatic ecosystem
Type de document :	texte imprimé
Auteurs :	Hong, You-Wei, Auteur
Importance :	pp. 1400-1405
Langues :	Anglais (eng)
Index. décimale :	577 Ecologie
Résumé :	This study focused on the accumulation and biodegradation of two typical polycyclic aromatic hydrocarbons (P/\HS), phenanthrene (PHE) and fluoranthene (FLA), by the diatoms enriched from a mangrove aquatic ecosystem in the jiulong River estuary, China. After separation, purification and culture, Skeletonema costatum (Greville) Cleve and Nitzschia sp.were exposed to different concentrations of PHE, FLA, anca m'xture of the two. The results showed that the tolerance of S. costatum to PHE and FLA was greater an that of Nitzschia sp., and that the toxic effect of FLA on S. costatum and Nitzschia sp. was higher than that of PHE. The microalgal species S. costatum and Nitzschia sp. were capable of accumulating and degrading the two typical PAHs simultaneously. The accumulation and degradation abilities of Nitzschia sp. were higher than those of S. costatum. Degradation of FLA by the two algal species was slower, indicating that FLA was a more recalcitrant PAH compound. The microalgal species also showed comparable or higher efficiency in the removal of the PHE-FLA mixture than PHE or FLA singly, suggesting that the presence of one PAH stimulated the degradation of the other.

Accumulation and bodegradation of phenanthrene and fluoranthene by the algae enriched from a mangrove aquatic ecosystem [texte imprimé] / Hong, You-Wei, Auteur . - [s.d.] . - pp. 1400-1405.
Langues : Anglais (eng)

Index. décimale :

577 Ecologie

Résumé :

This study focused on the accumulation and biodegradation of two typical polycyclic aromatic hydrocarbons (P/\HS), phenanthrene (PHE) and fluoranthene (FLA), by the diatoms enriched from a mangrove aquatic ecosystem in the jiulong River estuary, China. After separation, purification and culture, Skeletonema costatum (Greville) Cleve and Nitzschia sp.were exposed to different concentrations of PHE, FLA, anca m'xture of the two. The results showed that the tolerance of S. costatum to PHE and FLA was greater an that of Nitzschia sp., and that the toxic effect of FLA on S. costatum and Nitzschia sp. was higher than that of PHE. The microalgal species S. costatum and Nitzschia sp. were capable of accumulating and degrading the two typical PAHs simultaneously. The accumulation and degradation abilities of Nitzschia sp. were higher than those of S. costatum. Degradation of FLA by the two algal species was slower, indicating that FLA was a more recalcitrant PAH compound. The microalgal species also showed comparable or higher efficiency in the removal of the PHE-FLA mixture than PHE or FLA singly, suggesting that the presence of one PAH stimulated the degradation of the other.