Seitz Wolfram, Weber Walter H, Jiang Jia-Qian, Lloyd Barry J, Maier Matthias, Maier Dietrich, Schulz Wolfgang
Zweckverband Landeswasserversorgung, Betriebs- und Forschungslaboratorium, Am Spitzigen Berg 1, D-89129 Langenau, Germany.
Chemosphere. 2006 Aug;64(8):1318-24. doi: 10.1016/j.chemosphere.2005.12.030. Epub 2006 Feb 7.
A monitoring programme was carried out in order to determine iodinated X-ray contrast media (ICM) in the River Danube and to investigate the raw water quality for drinking water production at Langenau waterworks. The study revealed that the maximum concentrations of ICM (over 500 ng l(-1) for diatrizoic acid and iopamidol) were found in 2h-composite samples taken from the downstream of the Ulm/Neu-Ulm metropolitan area. By means of a concentration profile over one month the highest ICM concentrations were observed on weekdays. The extended data evaluation with principal component analysis shows that the upstream and downstream samples had different pattern of variations in ICM concentration and also demonstrates a clear change in ICM composition by the discharge of municipal wastewater. In addition to load profiles of ICM, time-dependent plots of principal component 1 exhibited peaks, indicating a short-term discharge of ICM between the two sampling sites. In conclusion, a point source for ICM contamination between the sampling sites in Ulm upstream and Leipheim downstream seems to be the reasonable explanation for peak ICM concentrations. Due to the observed high variations of ICM concentrations in river, the evaluation of natural waters by means of a single analysis is not representative.
开展了一项监测计划，以测定多瑙河中的碘化X射线造影剂（ICM），并调查朗根瑙水厂饮用水生产的原水水质。研究表明，在从乌尔姆/新乌尔姆大都市区下游采集的2小时混合样本中发现了ICM的最高浓度（泛影酸和碘帕醇超过500 ng l(-1)）。通过一个月的浓度曲线观察到，ICM浓度在工作日最高。通过主成分分析进行的扩展数据评估表明，上游和下游样本中ICM浓度的变化模式不同，并且还表明城市废水排放导致ICM成分发生明显变化。除了ICM的负荷曲线外，主成分1的时间依赖性图显示出峰值，表明两个采样点之间存在ICM的短期排放。总之，乌尔姆上游和莱普海姆下游采样点之间ICM污染的点源似乎是ICM浓度峰值的合理原因。由于观察到河流中ICM浓度的高度变化，通过单次分析对天然水进行评估并不具有代表性。
