摘要

  污水处理厂的污水是传播抗生素抗性微生物 (ARMs) 的主要途径之一，而海滩湾水与人体皮肤直接接触。需要注意去除污水处理厂污水和海湾水中的ARMs。我们的结果表明，在污水处理厂和海湾水的出水阶段，S2O82-/Fe2+ 可以有效去除ARMs 和总微生物（TMs）。使用叔丁醇、二甲亚砜和 Al2O3 作为清除剂的淬火实验证实，在 Fe(II) 激活的过硫酸盐氧化过程中，负责去除微生物的主要活性氧化剂可能是 SO4•- 和 Fe(IV)，而不是•OH .处理后细菌群落发生变化，α多样性显着降低。污水处理厂处理后海湾水中厚壁菌门相对丰度增加至8.56%，弧菌属等潜在病原体减少至0.03%。 S2O82-/Fe2+对环境的生态毒性进一步说明处理后指示种Oryzias latipes的死亡率没有增加，60/30μM的剂量可能是S2O82-/Fe2+的潜在理想剂量。该研究表明，Fe(II) 激活的过硫酸盐氧化作为一种环保且经济的方法可以减少污水处理厂污水和海湾水中的 TMs 和 ARMs。

  Sewage in WWTPs is one of main way to spread antibiotic resistant microbes (ARMs), and beach bay water is in direct contact with human skin. It is necessary to pay attention to remove the ARMs in WWTP sewage and bay water. Our results showed that ARMs and total microbes (TMs) can be effectively removed by S2O82-/Fe2+ in the effluent stage of WWTPs and bay water. Quenching experiments using tert-butyl alcohol, dimethyl sulfoxide and Al2O3 as scavengers confirmed that the primary reactive oxidants responsible for microbes removal during the Fe(II)-activated persulfate oxidation process might be SO4•- and Fe(IV), rather than •OH. The bacterial community shifted and the alpha diversity significantly reduced after treatment. In WWTP group, relative abundance of Firmicutes increased to 8.56%, and potential pathogens such as genus Vibrio decreased to 0.03% in bay water after treatment. The ecological toxicity to the environment of S2O82-/Fe2+ further illustrated that the mortality of indicator species Oryzias latipes did not increase after treatment, and the dosage of 60/30 μM can be potentially ideal dosage of S2O82-/Fe2+. This study revealed Fe(II)-activated persulfate oxidation as an eco-friendly and economical method could reduce TMs and ARMs in WWTP sewage and bay water.

  https://www.sciencedirect.com/science/article/abs/pii/S0304389420307226