| Popis: |
Several types of surfactants have been used in mineral process flotation. Studies appoint an environmental danger potential for some surfactants due to its persistent pollutant characteristic. Oxidation techniques, such as photo-Fenton, are better for surfactants degradation than conventional treatments. The aim of this work is to study the influence of reagent concentrations in the photo-Fenton reaction to degrade a surfactant used on mineral flotation. Experiments were conducted in 3L UV reactor with approximately 260 ppm surfactant solution, 10, 15, 22, 33, and 45 mM H2O2 and 1.4, 1.9, 2.2, 28, 80.13, 83, and 84.4 Fe2+/H2O2 molar rate. From this result, different pH ranges are available showing the 2.5–3 obtained best result. Samples were taken every 20 min in total of 2 h. The degradation was measured through analysis of total organic carbon. Preliminary results indicated that 1.4 molar rate is more efficient showing 70% of degradation when compared to another concentration. |
