树脂吸附—Fenton试剂氧化法处理水杨醛生产废水

Treatment of Salicylaldehyde Production Wastewater by Resin Adsorption-Fenton Reagent Oxidation Process

采用树脂吸附—Fenton 试剂氧化法处理水杨醛生产废水。XF-01树脂和 XF-02树脂静态吸附水杨醛生产废水时,COD 去除率均在85%以上,挥发酚去除率均高于90%。XF-02树脂对水杨醛生产废水的处理效果更佳。动态吸附随废水流量增大,吸附出水的 COD 和挥发酚质量浓度均增加。适宜的废水流量为15 BV,树脂的最佳脱附温度为80℃。在连续4批的吸附一脱附实验中,吸附出水的平均 COD 约为1 200 mg/L,平均挥发酚质量浓度小于10 mg/L。在 Fenton 试剂氧化中,铁屑和铁粉的催化效果差别很小,都好于 FeSO_4·7H_2O。以铁屑为催化剂、H_2O_2溶液加入量为1%时,氧化出水的 COD 小于150 mg/L,挥发酚质量浓度小于0.5 mg/L。

The resin adsorption -Fenton reagent oxidation process was used in the treatment of salicylaldehyde production wastewater. The removal rates of COD and volatile phenols are more than 85% and 90% respectively in the static adsorption using XF-01 and XF-02 resins. XF-02 resin is more efficient. In the dynamic adsorption, the COD and volatile phenol concentration in the effluent increase with the increasing of the wastewater flux. The optimum wastewater flux is 15 BV, and the optimum resorption temperature is 80 ~C. In the 4-cycle adsorption-resorption experiments, the average COD and volatile phenol concentration in the adsorption effluent are about 1 200 mg/L and less than 10 mg/L respectively. In the experiments of Fenton reagent oxidation, the catalytic effects of iron scrap and iron powder are close, and better than that of FeSO4 ~ 7H20. The COD and volatile phenol concentration in the oxidation effluent are below 150 mg/L and 0.5 mg/L respectively when the dosage of H2O2 is 1% and scrap iron is used as catalyst.