Production of MgFeO/activated carbons derived from a harmful grass Cynodon dactylon and their utilization for ciprofloxacin removal.

Cynodon dactylon, an invasive species, exhibits its robust adaptability, reproduction and nutrient regime against the local species. Taking advantage of this harmful grass as a raw precursor to produce valuable materials for wastewater treatment has paid much attention. Herein, we report on the fabrication of Cynodom dactylon derived MgFeO@AC with a main goal of effective removal of ciprofloxacin antibiotic from water. Our findings showed that MgFeO@ACK1 composites attained mesoporous textures, high specific surface areas (884.3-991.6 m g), and MgFeO-20%@ACK1 was the most effective with a very high removal efficiency of 96.7%. The Elovich model was suitable for describing the kinetic of adsorption with (R) of 0.9988. Meanwhile, the isotherm data obeyed the Langmuir model corresponding to (R) of 0.9993. Q value of MgFeO-20%@ACK1 was determined at 211.67 mg g. The proposed adsorption mechanism primarily comprises five routes as follows, (i) pore-filling, (ii) π-π interaction, (iii) electrostatic interaction, (iv) hydrogen bonding, and (v) hydrophobic interaction. MgFeO-20%@ACK1 adsorbent could reuse with three cycles. We recommend that MgFeO/ACs derived from Cynodom dactylon could be high-efficiency adsorbents for the elimination of antibiotics.