Análisis de la Degradación de Colorantes y Mezclas de Colorantes en Sistemas Tipo-Fenton Empleando Resolución Multivariada

LUCIANO CARLOS; MARIANA COSTANTE; SOFIA SOMMA; FERNANDO S. GARCÍA EINSCHLAG

Recife

Congreso; 7º Encontro sobre Aplicações Ambientais de Processos Oxidativos Avançados, 1º Congresso Iberoamericano de Processos Oxidativos Avançados (7º EPOA y 1º CIPOA); 2013

We reported herein, the degradation of three dyes (orange G, amido black 10b and alizarin red) using Fenton-like process. Experiments were performed with each dye separately and with mixtures of the dyes. In all cases, the degradation rates of each dye increased with Fe(III) concentration, decreased with dye concentration and showed a maximum for H2O2 concentration. Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS) was used to calculate the kinetic profiles of the dyes from the matrices of absorbance spectra at different reaction times. In single-dye experiments, the results obtained by applying quimiometric analysis showed a good concordance with those obtained with HPLC. In contrast, for experiments performed with mixtures of dyes, the mathematical approach showed some limitations depending on the nature of the mixtures