Department of Chemical Engineering, National Institute of Technology, Warangal, India.
Department of Chemical Engineering, National Institute of Technology, Calicut, India.
Chemosphere. 2022 Nov;307(Pt 4):136218. doi: 10.1016/j.chemosphere.2022.136218. Epub 2022 Aug 27.
Green Manganese Ferrite (GMF) and Chemical mediated Manganese Ferrite (CMF) were designed and prepared via in situ co-precipitation method and their adsorption potential was compared using the model dye, Metanil Yellow (MY). Previously, an extract of aquatic macrophyte and metal chloride were employed for the development of ecofriendly GMF. Alternatively, CMF has been synthesized through chemical co-precipitation from metal chloride precursors. Several characterization methods, including PSA, BET, TGA, DSC, FTIR, SEM, VSM, EDX, and XRD, were analyzed to reveal the structural and functional properties of the as-synthesized GMF and CMF. Their MY adsorption performances were tested as the function of the operational conditions such as initial solution pH, temperature, nanocomposite dosage, and dye concentration in a batch mode of operation. The pseudo-second order MY adsorption process fits best in Langmuir model which yielded the maximal monolayer adsorption capacity (q) of 391.34 mg/g for GMF and 271.89 mg/g for CMF. This outperformance of GMF over CMF was observed due to the augmentation of specified surface functional moieties derived from the phyto-constituents of macrophages. Further, the thermodynamic studies confirmed the chemisorptive and exothermic nature of adsorption processes. Conclusively, with the ease of regeneration and reuse potential, GMF and CMF could be viable contenders for scale up and industrial applications.
绿色锰铁氧体（GMF）和化学介导的锰铁氧体（CMF）通过原位共沉淀法设计和制备，并使用模型染料间甲酚黄（MY）比较其吸附潜力。此前，曾使用水生植物提取物和金属氯化物开发环保型 GMF。另一方面，通过从金属氯化物前体进行化学共沉淀合成了 CMF。采用 PSA、BET、TGA、DSC、FTIR、SEM、VSM、EDX 和 XRD 等多种表征方法，揭示了合成 GMF 和 CMF 的结构和功能特性。通过分批操作模式，测试了它们在初始溶液 pH 值、温度、纳米复合材料用量和染料浓度等操作条件下对 MY 的吸附性能。准二级 MY 吸附过程最适合 Langmuir 模型，GMF 的最大单层吸附容量（q）为 391.34mg/g，CMF 的最大单层吸附容量为 271.89mg/g。由于巨噬细胞植物成分衍生的特定表面功能基团的增加，GMF 优于 CMF。此外，热力学研究证实了吸附过程的化学吸附和放热性质。总之，GMF 和 CMF 具有易于再生和再利用的潜力，可能是扩大规模和工业应用的可行竞争者。
