Toxicity assessment of chlorinated secondary effluents by the Vibrio fischeri bioluminescence assay
Autor
Gómez López, María Dolores; Bayo Bernal, Francisco Javier; Moreno Angosto, José Manuel; Oleaga, I.; García, C.Área de conocimiento
Ingeniería QuímicaFecha de publicación
2009-09-12Editorial
WIT PressCita bibliográfica
GÖMEZ LÓPEZ, María Dolores [et al.]. Toxicity assessment of chlorinated secondary effluents by the Vibrio fischeri bioluminescence assay. En: WIT Transactions on Biomedicine and Health, Vol 14. ISSN 1743-3525. DOI: 10.2495/EHR090321Revisión por pares
siPalabras clave
bioluminescencedisinfected wastewater
reclaimed water,
chlorination
Resumen
The objective of this manuscript was to assess the toxicity formation on biological treated wastewater from a municipal wastewater treatment plant, after a chlorination-dechlorination disinfection process. Water was monitored by means of physicochemical and ecotoxicological parameters, with the use of Vibrio fischeri bioassay. Since a dechlorination process removed residual chlorine, the positive correlation between toxicity values and chlorine concentrations suggested the formation of toxic disinfection by-products (DBPs). Statistically significant differences could be observed for toxicity values according to total carbon, total inorganic carbon, total nitrogen, chlorine, and pH. However, total organic carbon, chemical oxygen demand, electrical conductivity and turbidity had no statistical significance on toxicity formation. Three second-order polynomial equations were fitted between with total carbon and total nitrogen concentrations as independent variables, and EC50 as a dependent ...
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