| 刘文琦,吴传辉,刘新宽,吴庆军,王晓博.化学沉淀和Fe/Cu-H2O2联合工艺快速处理柠檬酸废水[J].有色金属材料与工程,2026,47(1):64-71. |
| 化学沉淀和Fe/Cu-H2O2联合工艺快速处理柠檬酸废水 |
| Rapid treatment of citric acid wastewater using chemical precipitation and Fe/Cu-H2O2 combined process |
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| DOI：10.13258/j.cnki.nmme.20251109001 |
| 中文关键词: 柠檬酸废水 化学沉淀 Fe/Cu双金属催化剂 类芬顿 |
| 英文关键词:citric acid wastewater chemical precipitation Fe/Cu bimetallic catalysts Fenton-like |
| 基金项目:国家自然科学基金资助项目（51771119） |
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| 中文摘要: |
| 针对柠檬酸废水处理周期长、化学需氧量（chemical oxygen demand, COD）超标以及传统Fe/Cu双金属催化剂成本高的问题，研究了化学沉淀与Fe/Cu-H2O2联合处理工艺。通过控制镀铜条件，制备出低铜负载、高活性的Fe/Cu双金属催化剂，并利用响应面法优化Fe/Cu-H2O2处理柠檬酸废水的工艺条件。结果表明，经CaO沉淀处理0.5 h，废水COD质量浓度由20 000 mg/L降至383 mg/L；对CaO沉淀后的出水在H2O2加入量为2.1 mL/L、Fe/Cu加入量为7.4 g/L、反应初始pH为2.5、反应时间为2.2 h的条件下，响应面法预测COD去除率为95％，与实测值偏差仅1%。该组合工艺使废水COD质量浓度在3.5 h内降至22 mg/L，达到《城镇污水处理厂污染物排放标准》GB18918—2002一级A标准。研究证实，化学沉淀和Fe/Cu-H2O2联合工艺是柠檬酸废水处理的高效低成本的方法。 |
| 英文摘要: |
| A combined treatment process of chemical precipitation and Fe/Cu-H2O2 was studied to address the problems of long treatment cycle, excessive chemical oxygen demand (COD), and high cost of traditional Fe/Cu bimetallic catalysts for citric acid wastewater. By controlling the copper plating conditions, a low copper loading and high activity Fe/Cu bimetallic catalyst was prepared, and the process conditions for treating citric acid wastewater with Fe/Cu-H2O2 were optimized using response surface methodology. The results show that after 0.5 h of CaO precipitation treatment, the COD mass concentration of the wastewater decreased from 20 000 mg/L to 383 mg/L. Under the conditions of H2O2 addition of 2.1 mL/L, Fe/Cu addition of 7.4 g/L, initial reaction pH of 2.5, and reaction time of 2.2 h, the response surface methodology predicted a COD removal rate of 95% for the effluent after CaO precipitation, with a deviation of only 1% from the measured value. This combined process reduces the COD mass concentration of the wastewater to 22 mg/L within 3.5 h, meeting the Grade A standard of the "Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants" GB18918—2002. The research has confirmed that the combined process of chemical precipitation and Fe/Cu-H2O2 is an efficient and low-cost method for treatment of citric acid wastewater. |
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