摘要

    在2个垂直地下流（VF）人工湿地（每个1.5平方米）中调查了49种抗生素和11种选定的抗生素抗性基因（ARG）的发生和清除：非饱和（UVF）单元和部分饱和（SVF）单元（0.35）在0.8m中饱和m）并行运行并处理城市废水。在进水废水中检测到13种抗生素，所有样品中均存在6种。 SVF在去除4种化合物（即环丙沙星，氧氟沙星，哌啶酸和阿奇霉素）上显示出统计学意义，表明这种配置的更广泛的pH和/或氧化还原条件可能会促进某些抗生素的微生物降解。相反，流出物中的后者（哌啶酸除外）和克林霉素的浓度高于UVF的流入物中的浓度。在进水废水，sul1和sul2，blaTEM，ermB和qnrS中检测到五个ARG。除qnrS外，所有两个湿地的生物膜中都检测到了所有这些生物。 ARGs的平均去除率在两个湿地单元之间均无统计学差异，sul1，sul2分别为46％和97％，sul2为33％和97％，ermB为9％和99％，qnrS为18％和97％，11n％为98％。责备。

    The occurrence and removal of 49 antibiotics and 11 selected antibiotic resistance genes (ARGs) were investigated in 2 vertical subsurface flow (VF) constructed wetlands (1.5 m2 each): an unsaturated (UVF) unit and a partially saturated (SVF) unit (0.35 m saturated out of 0.8 m) operating in parallel and treating urban wastewater. Thirteen antibiotics were detected in influent wastewater, 6 of which were present in all samples. The SVF showed statistical significance on the removal of 4 compounds (namely ciprofloxacin, ofloxacin, pipemidic acid and azithromycin), suggesting that the wider range of pH and/or redox conditions of this configuration might promote the microbial degradation of some antibiotics. In contrast, the concentration of the latter (except pipemidic acid) and also clindamycin was higher in the effluent than in the influent of the UVF. Five ARGs were detected in influent wastewater, sul1 and sul2, blaTEM, ermB and qnrS. All of them were detected also in the biofilm of both wetlands, except qnrS. Average removal rates of ARGs showed no statistical differences between both wetland units, and ranged between 46 and 97% for sul1, 33 and 97% for sul2, 9 and 99% for ermB, 18 and 97% for qnrS and 11 and 98% for blaTEM.

    https://www.sciencedirect.com/science/article/abs/pii/S0048969720360836