Antibiotics consumption has increased worldwide, and their residues are frequently reported in aquatic environments. It is believed that antibiotics reach aquatic water bodies through sewage. Medicine consumed for healthcare practices are often released into sewage, and after sewage treatment plant, it reaches the receiving water bodies of lakes or rivers. In the present study, we determined the fate of some commonly used antibiotics in a sewage treatment plant (STP) located in Delhi and the environmental concentration of these antibiotics in the Yamuna River, which receives the sewage and industrial effluent of Delhi. There are many reports on antibiotics occurrences in STP and river water worldwide, but monitoring data from the Indian subcontinent is sparse. Samples were taken from a STP and from six sampling sites on the Yamuna River. Several antibiotics were tested for using offline solid-phase extraction followed by high-performance liquid chromatography equipped with photodiode array analysis. Recoveries varied from 25.5-108.8 %. Ampicillin had the maximum concentration in wastewater influents (104.2 ± 98.11 μg l(-1)) and effluents (12.68 ± 8.38 μg l(-1)). The fluoroquinolones and cephalosporins had the lower concentrations. Treatment efficiencies varied between 55 and 99 %. Significant amounts of antibiotics were discharged in effluents and were detected in the receiving water body. The concentration of antibiotics in the Yamuna River varied from not detected to 13.75 μg l(-1) (ampicillin) for the compounds investigated.

译文

全球范围内,抗生素的消费量增加了,其残留物经常在水生环境中被报道。据信,抗生素通过污水到达水生水体。用于医疗保健实践的药物通常会释放到污水中,经过污水处理厂后,它会到达湖泊或河流的接收水体。在本研究中,我们确定了位于德里的污水处理厂(STP)中一些常用抗生素的命运,以及接受德里的污水和工业废水的Yamuna河中这些抗生素的环境浓度。关于全球范围内的污水处理厂和河水中存在抗生素的报道很多,但是来自印度次大陆的监测数据很少。从STP和Yamuna河上的六个采样点采样。测试了几种抗生素的脱机固相萃取,然后进行了配备光电二极管阵列分析的高效液相色谱法。回收率从25.5-108.8%不等。氨苄西林在废水进水中(104.2±98.11μgl(-1))和废水中的最高浓度(12.68±8.38μgl(-1))。氟喹诺酮类和头孢菌素类的浓度较低。治疗效率在55%至99%之间。大量的抗生素被排放到废水中,并在接收水体中被检测到。 Yamuna河中抗生素的浓度从未检出到所研究化合物的13.75μgl(-1)(氨苄西林)不等。

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