Simultaneous activation and magnetization toward facile preparation of auricularia-based magnetic porous carbon for efficient removal of tetracycline

In this work, auricularia-based magnetic porous carbon (AMPC) is achieved via facile simultaneous activation and magnetization strategy. The AMPC shows specific surface area of 823.2 m² g⁻¹ and pore volume of 0.47 cm³ g⁻¹ nm⁻¹. The hysteresis loop indicates saturated magnetization of AMPC is about 11 emu g⁻¹. The morphology and composition of AMPC were also characterized by SEM, HRTEM, XRD, EDS mapping, XPS, etc. The AMPC exhibits a high adsorption capacity of 397.25 mg g ⁻¹ (318 K) for tetracycline (TC). The adsorption data can be fitted well by the Langmuir model and pseudo-second-order kinetic model. Additionally, the AMPC shows acceptable ability to resist ions and natural organic matter interference, and displays good feasibility of reuse by magnetic separation. We believe this facile simultaneous activation and magnetization strategy in converting biomass into a magnetic carbonaceous adsorbent that can remove pollutants from solution is very important for environmental remediation.