Doll Tusnelda E, Frimmel Fritz H
Water Chemistry, Engler-Bunte-Institut, Universität Karlsruhe, Engler-Bunte-Ring 1, Karlsruhe 76131, Germany.
Water Res. 2004 Feb;38(4):955-64. doi: 10.1016/j.watres.2003.11.009.
The light-induced degradation of clofibric acid, carbamazepine, iomeprol and iopromide under simulated solar irradiation has been investigated in aqueous solutions suspended with different TiO2 materials (P25 and Hombikat UV100). Kinetic studies showed that P25 had a better photocatalytic activity for clofibric acid and carbamazepine than Hombikat UV100. For photocatalytic degradation of iomeprol Hombikat UV100 was more suitable than P25. The results can be explained by the higher adsorption capacity of Hombikat UV100 for iomeprol. The study also focuses on the identification and quantification of possible degradation products. The degradation process was monitored by determination of sum parameters and inorganic ions. In case of clofibric acid various aromatic and aliphatic degradation products have been identified and quantified. A possible multi-step degradation scheme for clofibric acid is proposed. This study proves the high potential of the photocatalytic oxidation process to transform and mineralize environmentally relevant pharmaceuticals and contrast media in water.
在悬浮有不同二氧化钛材料（P25和Hombikat UV100）的水溶液中，研究了在模拟太阳辐射下光诱导的氯贝酸、卡马西平、碘海醇和碘普罗胺的降解情况。动力学研究表明，P25对氯贝酸和卡马西平的光催化活性比Hombikat UV100更好。对于碘海醇的光催化降解，Hombikat UV100比P25更合适。该结果可以通过Hombikat UV100对碘海醇的更高吸附容量来解释。该研究还着重于对可能的降解产物进行鉴定和定量。通过测定总参数和无机离子来监测降解过程。对于氯贝酸，已鉴定并定量了各种芳香族和脂肪族降解产物。提出了氯贝酸可能的多步降解方案。该研究证明了光催化氧化过程在转化和矿化水中与环境相关的药物和造影剂方面具有很高的潜力。
