Azo Dye Acid Blue 29: Biosorption and Phytotoxicity Test

Guari, Emi Brinatti; de Almeida, Érica Janaina Rodrigues; de Jesus Sutta Martiarena, Maria; Yamagami, Nívea Santos; Corso, Carlos Renato

Azo Dye Acid Blue 29: Biosorption and Phytotoxicity Test

2015

Guari, Emi Brinatti | de Almeida, Érica Janaina Rodrigues | de Jesus Sutta Martiarena, Maria | Yamagami, Nívea Santos | Corso, Carlos Renato

Many products contain dyes, such as fabrics. However, most of the industry-generated waste is improperly handled, which causes serious environmental problems for the bodies of water that receive textile effluents. This study aimed to analyze the effect of biosorbents and biosorption techniques on decolorizing the textile azo dye Acid Blue 29 in an aqueous solution employing pine sawdust. Pine sawdust is low-cost substrate with minor environmental impact. A toxicity test was performed with Lactuca sativa seeds to determine the LC₅₀ of the dye. Subsequently, a biosorption test was performed to determine the toxicity of the resulting solutions. We observed that biosorption is a very feasible technique for the discoloration of the solutions and promotes reduction in their toxicity.

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