旅客列车集便器废水中抗生素的光芬顿催化降解分析

旅客列车集便器废水中含有一定量生物难降解的磺胺甲恶唑（SMX）抗生素，使用光芬顿法对集便器废水中残留的抗生素进行催化降解，并对其机理进行分析。制备反应催化剂氧基氯化铁（FeOCl），并利用XRD、SEM、XPS等表征手段证明制备的FeOCl具有典型的长方体形状、层片状结构；实验模拟并对比7种不同催化条件下旅客列车集便器废水中SMX的降解效果，得出最优降解条件为H₂O₂浓度为8 mmol/L，FeOCl粉末投加量为0.2 g/L，SMX初始浓度为0.1 mmol/L；在最优条件下定量分析了体系中H₂O₂和NH₄+-N浓度的变化，及溶液中5种常见阴离子对SMX降解过程的抑制作用，为旅客列车集便器废水中抗生素降解的中试实验提供一定的理论和数据基础。

PHOTO-FENTON DEGRADATION WITH FEOCL CATALYST IN WASTEWATER FROM PASSENGER TRAIN TOILETS

There is certain concertarion of sulfamethoxazole(SMX) contained in wastewater from passenger train toilet, with bad biodegradability. In this paper, the sulfamethoxazole was chosen as the goal pollutants for Photo-Fenton degradation. The FeOCl powder was prepared by the thermal decomposition method. The analyzing results by XRD, SEM and XPS showed that FeOCl had a lamellar structure and a typical rectangular parallel-piped shape with good crystallinity. The SMX degradation experiments were carried out under seven different conditions and the optimal reaction condition was achieved. The concentrations of NH₄+-N and H₂O₂ in the whole reaction system were quantitatively analyzed under the optimal condition. The inhibition effect of the co-existence of five common anions was also evaluated, which could provide theoretical and data supports for the latter pilot test.