Fenton氧化处理微电解后制浆中段废水的研究

对微电解后废水初始pH、外加Fe2+、H2O2浓度、处理时间对色度及CODCr去除率的影响进行研究。实验结果表明随着pH的增加,色度和CODCr的去除率均呈现先增加后降低的趋势,在pH值等于4时,处理效果最好。外加Fe2+,H2O2和反应时间对废水CODCr和色度去除率的影响类似于pH的影响,获得的H2O2最佳投加量4 mL/L,FeSO4.7H2O为1.5g/L,最佳处理时间60min。在优化实验条件下,CODCr和色度的去除率稳定在80%和84%附近。

Study of Fenton Oxidation for Pulping Middle-Stage Effluent after Micro-Electrolysis

In this paper the effect of factors such as initial pH, Fe^2＋ dosage, H202 dosage and reaction time on removal rates of CODc, and chromaticity for the wastewater from micro-electrolysis was studied. The results showed that with pH increasing, the removal rates of CODcr and chromaticity increased first and then decreased and realized the optimum effect at pH 4. The similar trends could be observed for the factors such as Fe^2＋ dosage, H2O2 dosage and reaction time. The optimum dosages of H2O2 and FeSO4 · 7H2O, and optimum reaction time were 4 mL/L, 1.5g/L and 60min respectively. The removal rates of CODc, and chromaticity were about 80% and 84% respectively.