RESUMEN
Fresh water algae were subjected to different concentrations (0.03, 0.07, 0.12, 0.25 and 0.5 g x l(-1)) of aqueous extract of reference fuel oil (EPA, USA, API Oil No. 2, 38% aromatic, 1274). Significant decrease in Chlorophyll. (a) was observed as the concentration of fuel oil was increased. The EC50 value of fuel oil after 7 days was 0.29 g x l(-1). Total algal counts and growth rate decreased in response to the studied fuel oil. High diversity values in diatoms were observed in all treated aqueous cultures. High concentrations of fuel oil significantly decreased carbohydrate and protein contents of algal cells.
Asunto(s)
Clorofila/metabolismo , Eucariontes/crecimiento & desarrollo , Agua Dulce , Aceites Combustibles , Contaminantes Químicos del Agua , AnimalesAsunto(s)
Moduladores del GABA/farmacología , Insecticidas/farmacocinética , Malatión/farmacocinética , Residuos de Plaguicidas/farmacocinética , Fenobarbital/farmacología , Tilapia/metabolismo , Animales , Biotransformación , Activación Enzimática , Agua Dulce , Cromatografía de Gases y Espectrometría de Masas , Branquias/efectos de los fármacos , Branquias/metabolismo , Concentración de Iones de Hidrógeno , Insecticidas/metabolismo , Mucosa Intestinal/metabolismo , Intestinos/efectos de los fármacos , Hígado/efectos de los fármacos , Hígado/metabolismo , Malatión/metabolismo , Masculino , Oxigenasas de Función Mixta/metabolismo , Músculos/efectos de los fármacos , Músculos/metabolismo , Nefelometría y Turbidimetría , Residuos de Plaguicidas/metabolismo , Distribución Tisular , Contaminantes Químicos del Agua/metabolismoAsunto(s)
Chlorophyta/efectos de los fármacos , Cianobacterias/efectos de los fármacos , Diatomeas/efectos de los fármacos , Agua Dulce , Herbicidas/toxicidad , Triazinas/toxicidad , Contaminantes Químicos del Agua/toxicidad , Chlorophyta/crecimiento & desarrollo , Chlorophyta/metabolismo , Cianobacterias/crecimiento & desarrollo , Cianobacterias/metabolismo , Diatomeas/crecimiento & desarrollo , Diatomeas/metabolismo , Egipto , Herbicidas/farmacocinética , Triazinas/farmacocinética , Contaminantes Químicos del Agua/farmacocinéticaRESUMEN
Factors affecting the adsorption capacity of dyes on wood shavings, such as the mesh size of the adsorbent, wood dosages, contact time, and the structure of the adsorbant, were studied. Adsorption of dye on wood follows the classical Freundlich's isotherm. Available results indicated that wood shaving is a good adsorbent. Its capacity varies according to the structure of the dye and mesh size. Powdered activated carbon was used as a reference adsorbent for the same dyes under investigation.