Defect-rich graphene oxide (dGO) was used as sorbent for organic contaminants of emerging concern in tap water, including drugs and dyes, and the performance compared to those of lower-defects graphene types. The role of holes and carbonyl- carboxylic groups on graphene nanosheets surface on the adsorption mechanism and efficiency was investigated. dGO showed enhanced adsorption capacity toward two fluoroquinolone antibiotics (ofloxacin, OFLOX, and ciprofloxacin, CIPRO) in tap water with a maximum capacity of 650 mg/g, compared to 204 mg/g for Hummers derived commercial GO (hGO) and 125 mg/g for less defected Brodie derived GO (bGO) for OFLOX. The role of defects on the selective adsorption of OFLOX was also modelled by MD simulations, highlighting a mechanism mainly driven by the shape complementarity between the graphene holes and the molecules. Adsorption isotherms revealed different adsorption model for dGO, with a Langmuir fitting for dGO and BET fitting for all the other investigated samples. The maximum adsorption capacity of dGO for OFLOX was about six times higher than that of Granular Activated Carbon (95 mg/g), the industrial adsorption standard technology. Finally, it was also demonstrated that dGO can be recovered from treated water by ultrafiltration, this preventing secondary contamination risks and enabling safe use of graphene nanosheets for water purification.

富含缺陷的氧化石墨烯 (dGO) 被用作自来水中新出现的有机污染物（包括药物和染料）的吸附剂，其性能与低缺陷石墨烯类型的性能相比。研究了石墨烯纳米片表面上的空穴和羰基羧基对吸附机制和效率的作用。dGO 对自来水中的两种氟喹诺酮类抗生素（氧氟沙星，OFLOX 和环丙沙星，CIPRO）表现出增强的吸附能力，最大吸附能力为 650 mg/g，而 Hummers 衍生的商业 GO (hGO) 为 204 mg/g，125 mg/g g 用于 OFLOX 的缺陷较少的 Brodie 衍生 GO (bGO)。缺陷对 OFLOX 选择性吸附的作用也通过 MD 模拟进行建模，突出了主要由石墨烯孔和分子之间的形状互补性驱动的机制。吸附等温线揭示了 dGO 的不同吸附模型，dGO 的 Langmuir 拟合和所有其他研究样品的 BET 拟合。dGO 对 OFLOX 的最大吸附容量是工业吸附标准技术颗粒活性炭 (95 mg/g) 的六倍。最后，还证明可以通过超滤从处理过的水中回收 dGO，这可以防止二次污染风险，并使石墨烯纳米片能够安全地用于水净化。工业吸附标准技术。最后，还证明可以通过超滤从处理过的水中回收 dGO，这可以防止二次污染风险，并使石墨烯纳米片能够安全地用于水净化。工业吸附标准技术。最后，还证明可以通过超滤从处理过的水中回收 dGO，这可以防止二次污染风险，并使石墨烯纳米片能够安全地用于水净化。