Iron/zinc (Fe/Zn), phosphoric acid (H₃PO₄) or in combination (Fe/Zn + H₃PO₄) modified sludge biochar (SBC) were prepared and tested in this study to adsorb fluoroquinolones antibiotics including ciprofloxacin (CIP), norfloxacin (NOR) and ofloxacin (OFL) from water. Fe/Zn + H₃PO₄-SBC had an increased surface area (S_BET), total pore volume (V_tot), mesoporous volume (V_mes), pore diameter (D_p) and oxygen-containing functional groups. It exhibited superior adsorption performance for CIP, NOR and OFL with the maximum adsorption amount of 83.7, 39.3, 25.4 mg g⁻¹, respectively. Pseudo-second kinetic and Freundlich isotherm model presented the better fitting. The results of models and characterization analysis in combination indicated that physisorption and chemisorption, including pore filling, hydrogen bonding, π-π interaction, electrostatic interaction and functional groups complexation on a heterogeneous surface were the dominant process and mechanism. Liquid film diffusion was the main rate-limiting step. The adsorption process of CIP, NOR and OFL onto Fe/Zn + H₃PO₄-SBC were a spontaneous endothermic process. This study demonstrated that Fe/Zn + H₃PO₄ modified SBC exhibited high adsorption capacity, which was a promising adsorbent for fluoroquinolones as well as for other antibiotics effective removal from waters.

制备了铁/锌（Fe / Zn），磷酸（H ₃ PO ₄）或组合使用（Fe / Zn + H ₃ PO ₄）改性污泥生物炭（SBC），并在本研究中进行了测试，以吸附包括环丙沙星（ CIP），诺氟沙星（NOR）和氧氟沙星（OFL）。Fe / Zn + H ₃ PO ₄ -SBC具有增加的表面积（S _BET），总孔体积（V _tot），中孔体积（V _mes），孔径（D _p）和含氧官能团。它对CIP，NOR和OFL表现出优异的吸附性能，最大吸附量分别为83.7、39.3、25.4 mg g ^-1。伪秒动力学和Freundlich等温线模型表现出更好的拟合度。结合模型和表征分析的结果表明，异质表面上的物理吸附和化学吸附（包括孔填充，氢键，π-π相互作用，静电相互作用和官能团络合）是主要的过程和机理。液膜扩散是主要的限速步骤。CIP，NOR和OFL在Fe / Zn + H ₃ PO ₄上的吸附过程-SBC是自发的吸热过程。这项研究表明，Fe / Zn + H ₃ PO ₄改性的SBC表现出高吸附能力，这对于氟喹诺酮类药物以及其他有效地从水中去除的抗生素是有希望的吸附剂。