Activated carbon derived from peat-based biomass was sulfurized and magnetized forming magnetically-engineered sulfurized peat-based activated carbon (MEPBAC) and used for adsorption of caffeine (CFN) and sulfamethoxazole (SMX) from aqueous media. Modification increased the surface area (724 m²/g) and introduced sulphur-groups and Fe-based nano-structures in MEPBAC. Sulphur-groups enhanced adsorption efficiency, whereas Fe-based nano-structures facilitated easy magnetic separation of MEPBAC after intended use leading to high reusability with consistent removal efficiency (∼95 %). Response surface methodology was employed for design of experiments and process optimization. The results revealed that the maximum removal (SMX 94 %; CFN 97 %) could be achieved at an adsorbent dose of 1.4 and 1.6 g/L, respectively (pH 11, 311 K). Adsorption kinetics was best explained by a pseudo-second-order kinetic model. Adsorption data of SMX was fitted better to Langmuir (linear) and Freundlich (non-linear) isotherms, whereas that of CFN was fitted well with Freundlich (linear) and Langmuir (non-linear) isotherms (R² ≥ 0.99).

来自泥炭基生物质的活性炭被硫化和磁化形成磁性工程硫化泥炭基活性炭 (MEPBAC)，并用于从水介质中吸附咖啡因 (CFN) 和磺胺甲恶唑 (SMX)。修改增加表面积 (724 m ²/g) 并在 MEPBAC 中引入了硫基和铁基纳米结构。硫基团提高了吸附效率，而铁基纳米结构在预期使用后促进了 MEPBAC 的轻松磁分离，从而实现了高可重用性和一致的去除效率（~95%）。响应面方法用于实验设计和工艺优化。结果表明，在吸附剂剂量分别为 1.4 和 1.6 g/L（pH 值 11、311 K）时，可以实现最大去除率（SMX 94%；CFN 97%）。伪二级动力学模型最好地解释了吸附动力学。SMX 的吸附数据更适合 Langmuir（线性）和 Freundlich（非线性）等温线，而 CFN 的吸附数据更适合 Freundlich（线性）和 Langmuir（非线性）等温线（R ² ≥ 0.99)。