Alia Khaoula, Atia Djamal, Tedjani Mohammed Laid, Hasan Gamil Gamal, Mohammed Hamdi Ali, Laouini Salah Eddine, Abdullah Mahmood M S, Menaa Farid
Department of Process Engineering and Petrochemical, Faculty of technology, University of El Oued, 39000, El Oued, Algeria.
Laboratory of Biotechnology, Biomaterials and Condensed Matter, Faculty of technology, University of El Oued, 39000, El Oued, Algeria.
Sci Rep. 2024 Oct 8;14(1):23373. doi: 10.1038/s41598-024-75016-w.
A novel composite material, magnetic chitosan-clay/benzoin/FeO (CS-CY/Benz/FeO), was synthesized for effectively removing thionine dye (TH) from water solutions. The structural integrity and suitability of CS- CY/Benz/FeO composite for adsorption purposes were validated through extensive characterization techniques including BET, XRD, FTIR, and SEM. The adsorption efficiency was optimized through a Box-Behnken design (BBD) employing response surface methodology (RSM), focusing on variables such as adsorbent dose (A: 0.02-0.08 g), solution pH (B: 4-10), temperature (C: 30-60 °C), and time (D: 5-30 min). Experimental results revealed a maximum TH removal of 99% with significant interactions between temperature (C) and time (D) (p-value = 0.0001). The optimal conditions for TH removal were determined as pH ~ 5.91, adsorbent dosage of 0.08 g, temperature of 54.34 °C, and time of 29.7 min. The investigation of kinetics revealed that the adsorption process conformed to a pseudo-second-order (PSO) model, while the equilibrium data were effectively described by the Freundlich isotherm model. At a temperature of 333.15 K and a TH concentration of 350 mg/L, the adsorption capacity was determined to be 660.86 mg/g. The mechanism of adsorption encompassed various interactions such as electrostatic attractions, n-π interactions, hydrogen bonding, and Yoshida H-bonding. Particularly, the CS-CY/Benz/FeO composite demonstrated strong magnetic responsiveness, enabling straightforward separation from water using an external magnetic field after adsorption. Particularly, the CS-CY/Benz/FeO composite demonstrated strong magnetic responsiveness, enabling straightforward separation from water using an external magnetic field after adsorption. This research contributes important findings to the advancement of magnetic chitosan-based composites for efficient removal of TH dye pollutants from water environments.
合成了一种新型复合材料磁性壳聚糖-粘土/安息香/FeO（CS-CY/Benz/FeO），用于从水溶液中有效去除硫堇染料（TH）。通过包括BET、XRD、FTIR和SEM在内的广泛表征技术，验证了CS-CY/Benz/FeO复合材料用于吸附目的的结构完整性和适用性。采用响应面法（RSM）的Box-Behnken设计（BBD）对吸附效率进行了优化，重点关注吸附剂剂量（A：0.02-0.08 g）、溶液pH值（B：4-10）、温度（C：30-60°C）和时间（D：5-30分钟）等变量。实验结果表明，TH的最大去除率为99%，温度（C）和时间（D）之间存在显著相互作用（p值=0.0001）。确定TH去除的最佳条件为pH值约5.91、吸附剂剂量0.08 g、温度54.34°C和时间29.7分钟。动力学研究表明，吸附过程符合准二级（PSO）模型，而平衡数据可用Freundlich等温线模型有效描述。在温度333.15 K和TH浓度350 mg/L时，吸附容量确定为660.86 mg/g。吸附机制包括静电吸引、n-π相互作用、氢键和吉田氢键等各种相互作用。特别是，CS-CY/Benz/FeO复合材料表现出很强的磁响应性，吸附后可使用外部磁场直接从水中分离。这项研究为基于磁性壳聚糖的复合材料从水环境中高效去除TH染料污染物的进展做出了重要贡献。
