Degradação Fotocatalítica de Corante Alimentício Azorrubina e Monitoramento de Redução de Toxicidade

Abstract

In present work, simples of the food dyes organic synthetic (C₂OH₁₂N₂Na₂O₇S₂) was submitted to photodegradation with a support of the Fenton and photo-Fenton reactions and measure toxicity with a support of essays germination of the lettuce seeds (Lactuca sativa). The results showed that, using Fenton and photo-Fenton reactions and simples dyes with a concentration of the 2500 ppm, were achieved 100% discoloration in only 30 minutes. The photocatalytic of the uv-vis light, uv-vis and H₂O₂, Fenton and photo-Fenton reactions, constant values presented apparent discolored of the, k_ap = 0.02161 min^-1, k_ap = 0.04939 min^-1, e k_ap = 0.1244 min^-1, respectively. The reduction toxicity assays presented a significant reduction of toxicity after analyzing the samples collected in 120 minutes of the photolysis. The toxicity reduction achieved, compared to the control sample, was 17.43% for the growth of the radicle and 32.35% for the growth of the hypocotyl.

DOI: http://dx.doi.org/10.17807/orbital.v1i1.717