Kreuzinger N, Clara M, Strenn B, Vogel B
Institute for Water Quality and Waste Management, Vienna University of Technology, Karlsplatz 13/226, 1040 Vienna, Austria.
Water Sci Technol. 2004;50(2):221-8.
In a rural arid area without suitable receiving water the treated wastewater of a low loaded municipal wastewater treatment plant with full nutrient removal and additional post treatment steps is infiltrated into the unsaturated soil for groundwater recharge. Groundwater probes at increasing distances from the infiltration point have been sampled every two months over a period of 14 months. Beside conventional parameters (nutrients, carbon, and bacterial counts) samples were analysed for pharmaceutically active substances. Depending on and corresponding to their chemical structure and their fate during wastewater treatment, the selected substances showed different behaviour in the saturated zone of the groundwater. The antiepileptic Carbamazepine behaves very conservative and only is removed negligible even after long flow times within the subsurface zone. For other substances like the tranquilizer Diazepam or the analgesics Diclofenac a partial elimination during the different steps of wastewater treatment can be observed. Further degradation could be observed during the subsequent subsurface passage. In correlation with flow time additional removal of these substances from the aqueous phase can be observed. The musk substances Galaxolide and Tonalide were removed to some extend but not as good as the previous mentioned compounds.
在一个没有合适受纳水体的农村干旱地区，一座具有完全养分去除及额外后处理步骤的低负荷城市污水处理厂的经处理废水被渗入非饱和土壤以进行地下水回灌。在14个月的时间里，每隔两个月对距渗滤点距离不断增加的地下水探头进行采样。除了常规参数（养分、碳和细菌计数）外，还对样品进行了药物活性物质分析。根据所选物质的化学结构及其在废水处理过程中的归宿，它们在地下水饱和带表现出不同的行为。抗癫痫药物卡马西平表现得非常保守，即使在地下区域经过很长的流动时间后，其去除量也微乎其微。对于其他物质，如镇静剂地西泮或镇痛药双氯芬酸，在废水处理的不同步骤中可以观察到部分去除。在随后的地下径流过程中还可观察到进一步降解。与流动时间相关，可以观察到这些物质从水相中进一步去除。麝香物质佳乐麝香和吐纳麝香被部分去除，但不如上述化合物效果好。
