Study of Toxicity Associated to Dumping of Wastewater Containing Dyes and Pigments in the Aburra Valley Metropolitan Area

Leonardo-Fabio Barrios-Ziolo, Luisa-Fernanda Gaviria-Restrepo, Edison-Alexander Agudelo, Santiago-Alonso Cardona-Gallo

Abstract


Dyes and pigments are beginning to be considered in this country as compounds that can present toxicological characteristics beyond esthetic aspects of wastewater. This paper presents the ecotoxicological effects associated with the capacity to inhibit light transmission in an aquatic medium with color generating substances (dyes and pigments), as well as the toxicity associated the molecule that makes it up. From an experimental design a correlation was made of the effect of the concentration, total content of solids and maximum absorption wavelength of of different dyes in the Selenastrum Capricornutum organism. The regression models obtained enabled predicting, in 94 and 99%, the aforementioned effects. Molecular toxicity was evaluated using the Daphnia magna toxicity test. Lastly, the toxicity of wastewater dumping corresponding to the leading industrial sectors of the Metropolitan Area of the Aburrá Valley


Keywords


Dyes, pigments; Wastewater, toxicity tests; Daphnia magna; Selenastrum capricornutum; Analysis of variance (ANOVA)

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