In this study, biochar derived from municipal sludge was activated by zinc chloride, which was first time used as the precursor for hydrothermal synthesis of magnetic sludge biochar (Fe/Zn-SBC) for tetracycline (TC) and ciprofloxacin (CIP) removal. The maximum adsorption capacity of Fe/Zn-SBC for TC and CIP were 145 mg g⁻¹ and 74.2 mg g⁻¹ at 25 °C, respectively. Kinetics, isotherms, thermodynamics and characterization analysis suggested that the adsorption process was dominated by pore filling, oxygen-containing groups complexation, π-π conjugation and hydrogen bonding. Fe/Zn-SBC had the high selective adsorption capacity for TC and CIP in a wide pH range and even at the high ionic strength. The magnetic sensitivity ensured its easy separation performance. The co-processing of ultrasound and ethanol could effectively regenerate the used Fe/Zn-SBC. Also, it exhibited great environmental safety in the pH range of 3 to 12. These superiority suggested that it is a promising adsorbent for antibiotics removal.

在这项研究中，源自市政污泥的生物炭被氯化锌活化，这是首次用作水热合成磁性污泥生物炭（Fe / Zn-SBC）的前体，以去除四环素（TC）和环丙沙星（CIP）。Fe / Zn-SBC对TC和CIP的最大吸附容量为145 mg g ^-1和74.2 mg g ^-1分别在25°C下。动力学，等温线，热力学和特征分析表明，吸附过程主要由孔填充，含氧基团络合，π-π共轭和氢键作用决定。Fe / Zn-SBC在宽的pH范围内甚至在高离子强度下对TC和CIP都有很高的选择性吸附能力。磁敏性确保了其易于分离的性能。超声波与乙醇的共处理可以有效地再生废旧的Fe / Zn-SBC。而且，它在3至12的pH范围内显示出极大的环境安全性。这些优越性表明，它是去除抗生素的有前途的吸附剂。