Ecotoxicity Assessment of Weathered Waste Oil in a Mexican Wetland

R. Uribe-Hernández, M. A. Montes de Oca-García;M. A. Amezcua-Allieri;J. A. Zermeño- Eguía Lis;V. E. Martín


The present study applied the ecotoxicity assessment through of a battery of bioassays used to determine toxicity potential in a tropical wetland impacted for oil waste industry. The bioassays applied were Microtox®, Eisenia foetida, Glycine max and Triticum aestivum. The total petroleum hydrocarbons (TPH) in soil was varied to 200,000 mg kg-1. The PAHs between compounds detected was the benzo(a)pyrene (B(a)P). The results of bioassays showed a higher potential toxicity obtained in the zone 2 and 4 respect to control zone (p<0.001). The results from the MANOVA analysis, determined the zone 2 with the bigger ecotoxicity potential regarding to others zones. The results showed a gradient of sensitivity soil toxicity as follows: Microtox® > Eisenia foetida > Glycine max > Triticum aestivum (p < 0.05). In case of both values, LC50 and EC 50 for (B(a)P) the best relationship (r ? 0.9, P<0.05) was obtained with phytoassays with G. max and T. aestivum.


Ecotoxicity; TPH; PAH; B(a)P; Oil Waste; Bioassays; Wetland; Phytoassays; Tropical Wetland

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