Ariyanto Teguh, Pradana Nova Yoga, Saif Muhammad Hafish Nur, Prasetyo Bagus Adjie, Prasetyo Imam, Munoz Macarena
Department of Chemical Engineering, Faculty of Engineering, Universitas Gadjah Mada, 55281, Yogyakarta, Indonesia.
Department of Chemical Engineering, Universidad Autonoma de Madrid, Ctra. Colmenar Km 15, 28049, Madrid, Spain.
Environ Sci Pollut Res Int. 2024 May;31(24):35824-35834. doi: 10.1007/s11356-024-33658-3. Epub 2024 May 14.
This study aims to evaluate the feasibility of an innovative reusable adsorbent through adsorption-degradation sequence for antibiotic removal from water. The magnetite/mesoporous carbon adsorbent was prepared using a two-step method of (i) in situ impregnation of magnetite precursor during resorcinol formaldehyde polymerization and (ii) pyrolysis at elevated temperature (800 °C). XRD spectra confirmed that magnetite (FeO) was the only iron oxide species present in the adsorbent, and thermogravimetric analysis revealed that its content was 10 wt%. Nitrogen sorption analysis showed that FeO/carbon features a high fraction of mesopores (> 80 vol.%) and a remarkable specific surface area value (246 m g), outstanding properties for water treatment. The performance of the adsorbent was examined in the uptake of three relevant antibiotics. The maximum adsorption uptakes were ca. 76 mg g, ca. 70 mg g, and ca. 44 mg g for metronidazole, sulfamethoxazole, and ciprofloxacin, respectively. All adsorption curves were successfully fitted with Langmuir equilibrium model. The regeneration of adsorbent was carried out using Fenton oxidation under ambient conditions. After three consecutive runs of adsorption-regeneration, FeO/carbon maintained its performance almost unchanged (up to 95% of its adsorption capacity), which highlights the high reusability of the adsorbent.
本研究旨在评估一种创新的可重复使用吸附剂通过吸附 - 降解序列从水中去除抗生素的可行性。采用两步法制备磁铁矿/介孔碳吸附剂：（i）在间苯二酚甲醛聚合过程中原位浸渍磁铁矿前驱体；（ii）在高温（800℃）下热解。X射线衍射光谱证实磁铁矿（FeO）是吸附剂中唯一存在的铁氧化物，热重分析表明其含量为10 wt%。氮吸附分析表明，FeO/碳具有高比例的中孔（> 80 vol.%）和显著的比表面积值（246 m²/g），是水处理的优异性能。考察了该吸附剂对三种相关抗生素的吸附性能。甲硝唑、磺胺甲恶唑和环丙沙星的最大吸附量分别约为76 mg/g、约70 mg/g和约44 mg/g。所有吸附曲线均成功拟合朗缪尔平衡模型。在环境条件下使用芬顿氧化法对吸附剂进行再生。经过连续三次吸附 - 再生循环后，FeO/碳的性能几乎保持不变（高达其吸附容量的95%），这突出了吸附剂的高可重复使用性。
