摘要：

针对高COD含氟有机废水难以处理的问题，开发了一种新型复合除氟剂TS-F1，在相同条件下考察TS-F1、CaCl₂、AlCl₃对不同COD的含氟有机废水的去氟效果，并考察了TS-F1投加量、反应时间、反应温度对TS-F1去除含氟有机废水中氟离子效果的影响。结果发现：TS-F1除氟剂具有较高的除氟率，优于传统的CaCl₂和AlCl₃除氟剂，能够将氟离子质量浓度从50 mg/L降至1.5 mg/L以下，达到《地表水环境质量标准》（GB 3838—2002）地表水Ⅳ类排放标准；随着TS-F1投加量的增加、反应时间的延长、温度的增加，氟离子去除率增大。结果还发现，COD对氟离子去除率有显著影响，当COD≤60 mg/L时，TS-F1除氟剂能够达到最佳的除氟效果，而当COD>60 mg/L时，可以通过催化氧化技术进行预处理，降低废水中COD至60 mg/L以下再去除氟离子。TS-F1除氟剂是一种高效、经济的除氟剂，该研究为实际工程中高COD含氟有机废水处理提供了参考。

关键词: 含氟废水, 除氟剂, 催化氧化

Abstract:

To address the challenge of high COD fluorine-containing organic wastewater, a novel composite defluorinating agent, TS-F1, was developed. The defluorination performance of TS-F1 was compared with commonly used defluorinating agents, CaCl₂ and AlCl₃, under identical conditions for organic wastewater with different COD levels. The effects of TS-F1 dosage, reaction time, and reaction temperature on the removal of fluoride ions from fluorine-containing organic wastewater were also investigated. The results indicated that TS-F1 exhibited a higher defluorination rate compared to traditional CaCl₂ and AlCl₃ defluorinating agents, reducing the fluoride ion concentration from 50 mg/L to below 1.5 mg/L, which could meet the Class Ⅳ discharge standard of the Environmental Quality Standards for Surface Water (GB 3838-2002). Additionally, the defluorination rate increased with the increase of TS-F1 dosage, reaction time, and temperature. The study also found that COD significantly affected the defluorination rate. When COD≤60 mg/L, TS-F1 achieved optimal defluorination performance. For COD>60 mg/L, catalytic oxidation pretreatment was required to reduce COD to below 60 mg/L before defluorination. TS-F1 was an efficient and economical defluorinating agent. The study provided a reference for the treatment of high COD fluorine-containing organic wastewater in practical engineering.

Key words: fluorine-containing wastewater, defluorinating agent, catalytic oxidation

中图分类号: 

• X703