Treatment of Cr(III) - Containing Wastewater by Continuous Foam Separation
Cr(III)-containing wastewater was treated by continuous foam separation process. The factors affecting the Cr(III) removal efficiency were researched. The optimal operating conditions determined by orthogonal experiments are as follows:wastewater pH 6.50,gas flow 400ml/min,cationic surfactant dosage 50mg/L.When the mass concentration of Cr(III) in the influent is 7.5mg/L,the effluent can meet the national discharge standard with 98% of Cr(III) removal rate for continuous running. The kinetic experimental results show that the foam separation of Cr(III) accords with the first order kinetic equation. The results of continuous experiments in a scale-up foam separation column indicate which reach the Second Wastewater Discharge Standard of Country.
Hexing Li, Qunjie Xu and Daquan Zhang
D. J. Wang et al., "Treatment of Cr(III) - Containing Wastewater by Continuous Foam Separation", Advanced Materials Research, Vols. 356-360, pp. 1535-1538, 2012