Nassar Amal A, Mubarak Mahmoud F, El-Sawaf Ayman K, Zayed Mohamed A, Hemdan Mohamed
Chemistry Department, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia.
Petroleum Application Department, Egyptian Petroleum Research Institute (EPRI), Cairo 11727, Egypt; Core lab center, Egyptian Petroleum Research Institute (EPRI), 1 Ahmed El Zomor st., Nasr City, Cairo 11727, Egypt.
Int J Biol Macromol. 2025 Jan;284(Pt 2):137983. doi: 10.1016/j.ijbiomac.2024.137983. Epub 2024 Nov 26.
This research introduces an innovative composite, the cross-linked alginate-rice husk ash-graphene oxide-chitosan nanoparticles (CL-ARCG-CNP), designed for the effective adsorption of lead ions (Pb) in water treatment applications. Comprehensive characterization was performed using techniques such as Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), High-Resolution Transmission Electron Microscopy (HR TEM), Selected Area Electron Diffraction (SAED), Atomic Force Microscopy (AFM), Thermogravimetric Analysis (TGA), and Brunauer-Emmett-Teller (BET) analysis. These analyses revealed notable structural and morphological features. The CL-ARCG-CNP composite demonstrated a significant surface area of approximately 148.44 m/g, achieving an impressive adsorption capacity of 242.5 mg/g and a removal efficiency of 95.2 % after 240 min of contact duration. The adsorption process conformed to the Freundlich isotherm model (R: 0.998) and the pseudo-second-order kinetic model (R: 0.9992). Thermodynamic studies confirmed the spontaneity and endothermic nature of the adsorption process. Reusability tests showed that the composite could be reused for up to five cycles with minimal loss in adsorption capacity. These findings indicate that the CL-ARCG-CNP composite is highly effective for the removal of Pb ions from aqueous solutions, making it a promising material for wastewater treatment.
本研究介绍了一种创新型复合材料，即交联海藻酸钠-稻壳灰-氧化石墨烯-壳聚糖纳米颗粒（CL-ARCG-CNP），其设计用于水处理应用中对铅离子（Pb）的有效吸附。使用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、高分辨率透射电子显微镜（HR TEM）、选区电子衍射（SAED）、原子力显微镜（AFM）、热重分析（TGA）和布鲁诺尔-埃米特-泰勒（BET）分析等技术进行了全面表征。这些分析揭示了显著的结构和形态特征。CL-ARCG-CNP复合材料的比表面积约为148.44 m²/g，在接触240分钟后，吸附容量达到242.5 mg/g，去除效率达到95.2%，令人印象深刻。吸附过程符合弗伦德里希等温线模型（R：0.998）和准二级动力学模型（R：0.9992）。热力学研究证实了吸附过程的自发性和吸热性质。可重复使用性测试表明，该复合材料可重复使用多达五个循环，吸附容量损失最小。这些发现表明，CL-ARCG-CNP复合材料对于从水溶液中去除Pb离子非常有效，使其成为一种有前途的废水处理材料。
