Khelali Ahlem, Benmahdi Fatiha, Sahnoune Derradji, Sami Khettaf, Hacıosmanoğlu Gül Gülenay, Akram Sumia, Isinkaralar Kaan, Siswanta Dwi, Hosseini-Bandegharaei Ahmad
Laboratory of Chemistry and Environmental Chemistry (LCCE). Department of Chemistry, Faculty of Matter Sciences, University of Batna1, route de Biskra, Batna, 05000, Algeria.
Laboratory of Chemistry and Environmental Chemistry (LCCE). Department of Chemistry, Faculty of Matter Sciences, University of Batna1, route de Biskra, Batna, 05000, Algeria.
Environ Res. 2025 Aug 15;279(Pt 1):121744. doi: 10.1016/j.envres.2025.121744. Epub 2025 May 2.
This study developed reusable magnetite iron oxide nanoparticles (FeO@PGP-NPs) coated with pomegranate pomace extract (PGP) for the removal of Acid Green 25 (AG 25) dye and treatment of real tannery wastewater. The nanoparticles were characterized using FTIR, UV-Vis, XRD, FESEM/EDX, VSM, and BET techniques, revealing spherical FeO NPs with an average diameter of 20.30 nm, a BET surface area of 69 m/g, and a magnetization value of 42.41 emu/g. Optimization via RSM-CCD identified optimal adsorption conditions: FeO@PGP-NPs dosage of 2.2 g/L, contact time of 88 min, and dye concentration of 200 mg/L, achieving 99 % removal efficiency. Adsorption followed the Langmuir model, with a monolayer capacity of 213 mg/g, and pseudo-second-order kinetics. Thermodynamic analysis confirmed the process was spontaneous and endothermic. When applied to tannery wastewater, FeO@PGP-NPs achieved removal efficiencies of 98.87 % for BOD and 97.40 % for COD across treatment stages. Additionally, the nanoparticles maintained efficiency for up to five reuse cycles, demonstrating significant potential as a nanoadsorbent for dye removal and industrial wastewater treatment.
本研究开发了一种可重复使用的、包覆有石榴皮渣提取物（PGP）的磁铁矿氧化铁纳米颗粒（FeO@PGP-NPs），用于去除酸性绿25（AG 25）染料及处理实际制革废水。采用傅里叶变换红外光谱（FTIR）、紫外可见光谱（UV-Vis）、X射线衍射（XRD）、场发射扫描电子显微镜/能谱仪（FESEM/EDX）、振动样品磁强计（VSM）和比表面积分析仪（BET）技术对纳米颗粒进行了表征，结果显示其为平均直径20.30 nm的球形FeO纳米颗粒，BET比表面积为69 m²/g，磁化值为42.41 emu/g。通过响应面法-中心复合设计（RSM-CCD）进行优化，确定了最佳吸附条件：FeO@PGP-NPs投加量为2.2 g/L、接触时间为88 min、染料浓度为200 mg/L，去除效率达到99%。吸附过程符合朗缪尔模型，单层吸附容量为213 mg/g，且符合准二级动力学。热力学分析证实该过程是自发的且为吸热过程。将FeO@PGP-NPs应用于制革废水处理时，在整个处理阶段对生化需氧量（BOD）的去除效率达到98.87%，对化学需氧量（COD）的去除效率达到97.40%。此外，这些纳米颗粒在多达五个重复使用周期内均保持高效，显示出作为染料去除和工业废水处理纳米吸附剂的巨大潜力。
