Efecto Ecotoxicológico de la Mezcla de Aroclor 1254 y Plomo en el Bioindicador Daphnia magna

Translated title of the contribution: Ecotoxicological effect of the mixture of Aroclor 1254 and lead in the bioindicator Daphnia magna

Carlos Nicolás Dellafredad Tesén, José Alberto Iannacone

Research output: Contribution to journalArticlepeer-review

Abstract

Introduction: the bioassay with the bioindicator species Daphnia magna Strauss, 1820 makes it possible to obtain the individual acute ecotoxicological effect and in a mixture of various chemical toxics by means of the mean lethal concentration (LC50). Objective: to determine the ecotoxicological effect of the mixture of aroclor 1254 and lead (Pb2+) on D. magna. Materials and Methods: LC50 was measured with arochlor 1254> Pb2+, and subsequently the concentration without ecological effect (PNEC) for the individual effect and as a mixture. PNEC values were contrasted with category 4–E1 (lagoons and lakes) and E2 (rivers) of the Peruvian Environmental Quality Standard (Supreme Decree No. 004 2017-MINAM-Peru). Results: LC50 values gradually decreased after 48 h of exposure for both compounds individually and as a mixture. The proportion–synergy (PS) was calculated in ratios of 1:1, 3:2 and 4:1 (arochlor 1254: Pb2+), obtaining higher PS values in 3:2 and 4:1 in contrast to 1:1. Conclusions: the PNEC estimated arochlor 1254 concentration is similar to the conservation value of the aquatic environment category 4–E1 and E2, and the maximum concentration for Pb2+ is not adequate and should be reduced to strengthen the conservation of aquatic biota. Finally, the bioindicator D.

Translated title of the contributionEcotoxicological effect of the mixture of Aroclor 1254 and lead in the bioindicator Daphnia magna
Original languageSpanish
Pages (from-to)144-161
Number of pages18
JournalRevista Lasallista de Investigacion
Volume18
Issue number2
DOIs
StatePublished - 10 Dec 2021

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