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(79-17) Deriving Site Specific Water Quality Criteria for Nonylphenol−9−Polyethoxylate (NP9EO) in Coastal Waters. Perales, Jose*,1, Sibila, Miguel1, Garrido, Maria1, Nebot, Enrique1, Sales, Diego1, Quiroga, Jose1, 1 University of Cádiz, Puerto Real, Cadiz ABSTRACT- The present study summarises an approach for deriving site-specific water quality criteria for nonylphenol−9−polyethoxylate (NP9EO), based on the resident species procedure of USEPA. In the development of the bioassays, dilution water from Cadiz Bay (Southwest Iberian Peninsula) and synthetic sea-water (USEPA, 1990) was used. The resident species and the bioassays were: (1) alga growth inhibition test with Dunaliella salina, Chaetoceros gracilis, Nannochloropsis gaditana, Tetraselmis chuii, Isochrysis galbana; (2) 24-h acute toxicity test with the crustacean Artemia salina and (3) standard toxicity test microtox with the marine bacteria Vibrio fischeri. The natural environmental conditions (photoperiod and temperature) were defined in laboratory for the development of bioassays. For deriving the ecotoxicological value, a final acute (FAV), final chronic (FCV) and final plant (FPV) toxicity values were calculated and compared to water quality criterias from different normative. Key words: Ecotoxicology, Nonionic Surfactants, microtox, microalgae |
