论文部分内容阅读
采用常温浸渍法制备催化剂Cu_xFe_(1-x)@γ-Al_2O_3,并用于陶瓷印花废水的催化湿式氧化处理,考察组分构成对催化剂Cu_xFe_(1-x)@γ-Al_2O_3活性和稳定性的影响。结果表明:在4种样品Cu0.5Fe0.5@γ-Al_2O_3,Cu@γ-Al_2O_3,Fe@γ-Al_2O_3和γ-Al_2O_3中,Cu0.5Fe0.5@γ-Al_2O_3的催化活性和稳定性最高。催化剂Cu0.5Fe0.5@γ-Al_2O_3中的Fe促进Cu进入γ-Al_2O_3载体内部并形成稳定的固溶体Al2Cu O4,故此催化剂的硬度和稳定性最高;此催化剂应用前后的SEM图无明显的形貌变化,XRD谱图无明显的物相变化,证实了其稳定性的存在。在优化的操作条件下,催化剂Cu0.5Fe0.5@γ-Al_2O_3催化湿式氧化陶瓷印花废水的COD及色度分别为280 mg·L~(-1)、20倍,达到《污水综合排放标准》(GB 8978~(-1)996)中染料类废水的三级排放标准。
The catalyst Cu_xFe_ (1-x) @ γ-Al_2O_3 was prepared by impregnation at room temperature and used for the catalytic wet oxidation of ceramic printing wastewater. The effects of component composition on the activity and stability of Cu_xFe_ (1-x) . The results show that Cu0.5Fe0.5 @ γ-Al_2O_3 has the highest catalytic activity and stability among the four samples Cu0.5Fe0.5 @ γ-Al_2O_3, Cu @ γ-Al_2O_3, Fe @ γ-Al_2O_3 and γ-Al_2O_3 . The Cu in the catalyst Cu0.5Fe0.5@γ-Al_2O_3 promoted the Cu into the γ-Al_2O_3 support and formed a stable solid solution Al2Cu O4, so the hardness and stability of the catalyst were the highest. The SEM images of the catalyst before and after application showed no obvious morphology XRD spectrum showed no obvious phase change, confirming the existence of its stability. Under optimized operating conditions, the COD and chromaticity of Cu0.5Fe0.5@γ-Al_2O_3 catalyst for catalytic wet oxidation of ceramic printing wastewater were 280 mg · L -1 and 20 times, respectively, reaching the “Integrated Wastewater Discharge Standard” (GB 8978 ~ (-1) 996) in the three-tier wastewater discharge standards.