以抗生素中常见的磺胺增效剂甲氧苄啶（TMP）为目标污染物、葡萄籽提取液合成纳米铁铈（Fe/Ce-NPs）为催化剂，采用非均相类芬顿体系对甲氧苄啶的降解进行研究。利用SEM、FT-IR、XRD和XPS等对合成的催化剂进行表征。同时考察了反应温度、H₂O₂浓度、催化剂投加量、TMP初始质量浓度和溶液初始pH对降解甲氧苄啶的影响。结果表明，在TMP初始质量浓度为30 mg/L、Fe/Ce-NPs质量浓度为0.27 g/L、H₂O₂浓度为0.6 mol/L、35℃和pH 4.0的条件下反应50 min时，TMP的去除率可达100%。伪一级和伪二阶动力学模型均能有效拟合该类芬顿法对TMP的降解过程，但伪二级拟合效果更优，表明该反应过程以化学反应为主，且Ce³⁺/Ce⁴⁺催化还原体系以及CeO₂的氧空位作用会促进Fe-NPs/H₂O₂降解TMP。

Taking trimethoprim (TMP), a common sulfonamide synergist in antibiotics, as the target contaminant, the degradation of TMP by heterogeneous Fenton system is studied over nano-Fe/Ce-NPs catalyst that is synthesized from grape seed extracts.The synthesized catalyst is characterized by SEM, FT-IR, XRD and XPS.The effects of reaction temperature, H₂O₂ concentration, catalyst dosage, TMP initial concentration and solution initial pH on the degradation are investigated.Results show that the removal rate of TMP can reach 100% as the initial concentration of TMP is 30 mg·L^-1, the mass content of Fe/Ce-NPs is 0.27 g·L^-1, H₂O₂ concentration is 0.6 mol·L^-1, reaction temperature remains at 35℃, the initial pH of the solution is 4.0 and the reaction has performed for 50 min.Both pseudo-first-order (0.952 1-0.980 0) and pseudo-second-order kinetics (0.985 6-0.998 0) models can effectively fit the degradation process of TMP by this Fenton method, but the latter fits better, which indicates that the reaction process is mainly chemical reaction.The Ce³⁺/Ce⁴⁺ catalytic reduction system and the oxygen vacancy of CeO₂ can promote the degradation of TMP by Fe/Ce-NP_S/H₂O₂.

张磊(1994-),男,硕士研究生,研究方向为水污染控制与水质保障,1390196279@qq.com