Ionic liquid-modified magnetic graphene oxide nanocomposite as a powerful adsorbent for the removal of lead ions and brilliant blue dye

In this research, a magnetic graphene oxide modified with ionic liquid has been synthesized and used as a powerful nanocomposite for the removal of lead (Pb ²⁺ ) ions and brilliant blue (BB) dye from a water sample. This nanocomposite was characterized by using EDS, FTIR, SEM, and VSM techniques, which confirmed the successful formation of the desired nanocomposite and good immobilization of the ionic liquid. The ultraviolet-visible (UV-Vis) and atomic absorption (AA) spectroscopy techniques were employed to quantify the extent of removal of Pb ²⁺ ions and BB dye. The removal percentages of Pb ²⁺ ions and BB dye by the prepared nanocomposite were 94% and 96%, respectively, demonstrating its excellent performance. According to the Langmuir isotherm, the maximum adsorption capacities of the nanocomposite toward Pb ²⁺ ions and BB dye were achieved to be 83.34 and 84.76 mg g ^− 1 , respectively. Also, this nanocomposite was recoverable and reusable at least three times.