Departament d'Enginyeria Química, EUETIB, Universitat Politècnica de Catalunya, c/Comte d'Urgell 187, 08036 Barcelona, Spain.
Water Res. 2010 Apr;44(8):2533-40. doi: 10.1016/j.watres.2010.01.032. Epub 2010 Feb 4.
The present study provides results describing the degradation performance of the Sulfamethazine (SMT) antibiotic via photo-Fenton treatment. Experiments were carried out using 1 L solution samples of SMT (50 mg L(-1)) under different conditions. HPLC results reveal that both Fenton and photo-Fenton reactions were able to completely remove SMT antibiotic from the studied samples in less than 2 min treatment. Half-life times and kinetic parameters (assuming a pseudo-first-order kinetics at reaction initial stage, far from the equilibrium) for SMT degradation were determined and discussed. Hence, appropriate Fenton reagent loads are given to attain different targets proposed. TOC and HPLC data also revealed the presence of reaction intermediates; thus toxicity assays were performed regarding bacterial growth rate. The toxicity of an SMT solution was shown to increase during its degradation by means of photo-Fenton reactions.
本研究提供了通过光芬顿处理降解磺胺甲恶唑（SMT）抗生素的结果描述。实验在不同条件下使用 1 L 的磺胺甲恶唑（50 mg/L）溶液样品进行。HPLC 结果表明，芬顿和光芬顿反应都能够在不到 2 分钟的处理时间内将研究样品中的 SMT 抗生素完全去除。半衰期和动力学参数（在反应初始阶段假设为拟一级动力学，远离平衡）确定并讨论了 SMT 降解。因此，给出了合适的芬顿试剂负载以达到所提出的不同目标。TOC 和 HPLC 数据还表明存在反应中间体；因此，针对细菌增长率进行了毒性测定。通过光芬顿反应降解磺胺甲恶唑溶液的毒性显示出增加。
