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以焦化废水脱水污泥为载体、ZnCl2为活化剂和催化剂的活性组分,采用一步法制备污泥催化剂。实验结果表明,当ZnCl2浓度为4 mol/L、固液比1∶3、焙烧温度550℃、焙烧时间40 min时,制备的污泥催化剂对亚甲基蓝的脱色性能最佳。利用制备的催化剂对活性红X-3B、弱酸性艳红B、活性蓝X-BR溶液进行脱色处理,研究反应时间、染料浓度、溶液pH、催化剂投加量和H2O2用量对染料脱色性能的影响。最佳条件下,3种废水的脱色率分别达到90.7%、97.5%和94.4%。对脱色数据进行动力学模拟,结果表明,3种染料废水脱色反应分别符合二级动力学模型、一级动力学模型、二级动力学模型。
Using coking wastewater dewatered sludge as carrier, ZnCl2 as activator and active component of catalyst, one-step method was used to prepare sludge catalyst. The experimental results show that when the concentration of ZnCl2 is 4 mol / L, the solid-liquid ratio is 1: 3, the calcination temperature is 550 ℃, and the calcination time is 40 min, the prepared decolorization performance of methylene blue is the best. The prepared catalyst was used to decolorize Reactive Red X-3B, Acid Red B and Reactive Blue X-BR. The effects of reaction time, dye concentration, solution pH, dosage of catalyst and amount of H2O2 on the decolorization performance of dye . Under optimal conditions, the decolorization rates of the three kinds of wastewater reached 90.7%, 97.5% and 94.4% respectively. The kinetic simulation of decoloration data shows that the three kinds of dye wastewater decolorization reaction are in accordance with the second-order kinetic model, the first-order kinetic model and the second-order kinetic model, respectively.