The adsorption of metronidazole (MNZ) and trimethoprim (TMP) antibiotics from water on nanomaterials synthesized from graphene oxide and graphite, was examined thoroughly. The effect of the physicochemical properties and surface area onto the adsorption capacity of the nanomaterials was studied in detail. The nanocarbon materials used were graphene oxide (GO), and GO reduced in inert medium (rGO) or ammonia (N-rGO), and four high surface area graphites (HSAG100, HSAG300, HSAG400, HSAG500). The nanomaterials characterization was performed by transmission and scanning electron microscopy, N₂ physisorption, TG-profiles and X-ray diffraction. The increasing order of the nanomaterial adsorption capacity toward MNZ was: HSAG100 < HSAG300 < N-rGO < HSAG400 < HSAG500 < GO < rGO and toward TMP was: HSAG100 < N-rGO ≈ HSAG300 < HSAG400 < HSAG500 ≈ rGO < GO; and except for GO, the adsorption capacity of the nanomaterials increased almost linearly with the surface area. At T = 25 °C, the maximum mass adsorbed of MNZ and TMP on GO were 190 and 218 mg/g, at pH 7 and pH 10, respectively. The adsorption of TMP and MNZ on GO corroborated the presence of different adsorption mechanisms dependent on antibiotic speciation and pH. The adsorption of both antibiotics on the materials based on graphite and reduced graphene oxide was predominantly due to π-π dispersive interactions.

彻底检查了水对甲硝唑（MNZ）和甲氧苄啶（TMP）抗生素在氧化石墨烯和石墨合成的纳米材料上的吸附。详细研究了理化性质和表面积对纳米材料吸附能力的影响。所用的纳米碳材料为氧化石墨烯（GO），在惰性介质（rGO）或氨气（N-rGO）中还原的GO和四个高表面积的石墨（HSAG100，HSAG300，HSAG400，HSAG500）。通过透射和扫描电子显微镜N ₂对纳米材料进行表征物理吸附，TG谱和X射线衍射。纳米材料对MNZ的吸附能力从高到低依次为：HSAG100 <HSAG300 <N-rGO <HSAG400 <HSAG500 <GO <rGO并朝向TMP：HSAG100 <N-rGO≈HSAG300 <HSAG400 <HSAG500≈rGO <GO；除GO外，纳米材料的吸附能力几乎随表面积线性增加。在T = 25°C时，pH为7和pH 10时，GO上MNZ和TMP的最大吸附量分别为190 mg / g和218 mg / g。TMP和MNZ在GO上的吸附证实了取决于抗生素形态和pH的不同吸附机制的存在。两种抗生素在基于石墨和还原性氧化石墨烯的材料上的吸附主要是由于π-π分散相互作用。