Removal of xanthate in flotation wastewater by ultrasound and Fenton reagent

The mineral processing wastewater of sulfide ore is easily cause environment pollution, because it contains xanthate. This thesis applied the combined technology of ultrasound and Fenton reagent to deal with the artificial and actual mineral processing wastewater, in terms of the effects of pH value, H₂O₂ and Fe²⁺ concentration on the removal efficiency of xanthate. The results showed that combined ultrasound with Fenton reagent has the synergistic effect, the removal efficiency is better than use ultrasound and Fenton reagent singly. For dealing with the xanthate simulated wastewater, which concentration is 120 mg·L^-1, on the condition of concentration of H₂O₂ is 20 mg·L^-1, concentration of Fe²⁺ is 12 mg·L^-1, initial pH of wastewater is 4, the removal of xanthate rate attains up to 96.8%; and for dealing with the actual mineral processing wastewater, on the condition of pH is 3, concentration of H₂O₂ is 24 mg·L^-1, concentration of Fe²⁺ is 18 mg·L^-1, the removal of xanthate rate attains up to 97.6%, which meet the standard for discharge of xanthate wastewater. At last, this thesis discussed the mechanism of the xanthate was degraded by combined technology of ultrasound and Fenton reagent.