Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur 440020, India.
Bioresour Technol. 2023 Feb;369:128399. doi: 10.1016/j.biortech.2022.128399. Epub 2022 Nov 26.
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 m/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 (R ≥ 0.99).
从泥炭基生物质中制备的活性炭经过硫化和磁化，形成了磁工程化硫化泥炭基活性炭（MEPBAC），并用于从水溶液中吸附咖啡因（CFN）和磺胺甲恶唑（SMX）。改性增加了表面积（724 m/g），并在 MEPBAC 中引入了硫基团和 Fe 基纳米结构。硫基团提高了吸附效率，而 Fe 基纳米结构则有利于 MEPBAC 在预期使用后易于进行磁性分离，从而具有较高的可重复使用性和一致的去除效率（~95%）。响应面法被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 11，311 K）时，可达到最大去除率（SMX 94%；CFN 97%）。吸附动力学最好由伪二级动力学模型解释。SMX 的吸附数据更符合 Langmuir（线性）和 Freundlich（非线性）等温线，而 CFN 的吸附数据则更符合 Freundlich（线性）和 Langmuir（非线性）等温线（R ≥ 0.99）。
Zotero 插件