鼠李糖脂协同氮磷共改性活性炭/过一硫酸盐体系去除地下水中氧氟沙星

Association of Rhamnolipid and the System of Nitrogen-Phosphorus Co-Modified Activated Carbon/Peroxymonosulfate for Ofloxacin Removal from Groundwater

本研究制备了一种非金属高效催化剂——氮磷共改性活性炭(NPAC),利用鼠李糖脂增强NPAC在多孔介质中的迁移能力和分散性,促进NPAC/过一硫酸盐(PMS)体系去除地下水中氧氟沙星;探究NPAC剂量、PMS浓度、氧氟沙星浓度、达西流速对NPAC/PMS体系去除氧氟沙星的影响。结果表明,在鼠李糖脂的协同作用下,NPAC/PMS体系在多孔介质环境中适用性较广,氧氟沙星的最高去除率达到84.30%。

In this study, a metal-free and efficient catalyst, nitrogen-phosphorus co-modified activated carbon (NPAC), was prepared to facilitate the removal of ofloxacin from groundwater in the NPAC/ peroxymonosulfate (PMS) system by using rhamnolipids to enhance the mobility and dispersibility of NPAC in the porous medium. The influence of NPAC dosage, PMS concentration, ofloxacin concentration, and Darcy velocity on the removal of ofloxacin by NPAC/PMS system was investigated. Results showed that under the synergistic effect of rhamnolipids, the NPAC/PMS system was more widely applicable in porous media environments, with the highest removal rate of ofloxacin reaching 84.30%.