Alrashed Maher M, El-Harbawi Mohanad, Yin Chun-Yang, Alquraini Abdullah, Aboughaly Mohamed, Aleid Musaad Khaled, Bin Bandar Khaled, Aljlil Saad, Saud Alalawi Abdulrahman, Omar Alturkistani Rayan
Chemical Engineering Department, College of Engineering, King Saud University, Riyadh, Saudi Arabia.
Newcastle University in Singapore, SIT Building @ Ngee Ann Polytechnic, Singapore.
Int J Phytoremediation. 2025;27(6):842-851. doi: 10.1080/15226514.2025.2450834. Epub 2025 Jan 9.
This study introduces a sustainable biological approach for synthesizing silver nanoparticles (AgNPs) using Conocarpus seeds, aimed at improving the adsorption and photocatalytic degradation of methylene blue (MB) in wastewater treatment. The photocatalytic efficiency of AgNPs, synthesized under varying concentrations of silver nitrate (AgNO) and pH levels, was evaluated, together with the effectiveness of a photocatalytic reactor. The synthesized samples were characterized using scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier-transform infrared (FT-IR) spectroscopy, and atomic force microscopy (AFM). Results showed that MB degradation occurred quickly within the first 50 min, achieving a 99.60% removal efficiency adsorption and photocatalytic degradation under optimal conditions (pH = 3, 1 g sample) after 1 h. The maximum adsorption capacity reached 49.80 mg·g. Furthermore, the AgNPs demonstrated a significant degradation rate of 99.76% within 2 h under UV light, highlighting the synergistic effects of AgNPs in enhancing both adsorption and photocatalysis. This study not only accentuates the potential of Conocarpus seeds as an eco-friendly precursor for AgNP synthesis but also highlights the applicability of AgNPs in wastewater treatment.
本研究介绍了一种利用海枣种子合成银纳米颗粒（AgNPs）的可持续生物学方法，旨在提高废水处理中对亚甲基蓝（MB）的吸附和光催化降解效果。评估了在不同浓度硝酸银（AgNO）和pH值条件下合成的AgNPs的光催化效率，以及光催化反应器的有效性。使用扫描电子显微镜（SEM）、热重分析（TGA）、傅里叶变换红外（FT-IR）光谱和原子力显微镜（AFM）对合成样品进行了表征。结果表明，MB降解在前50分钟内迅速发生，在最佳条件（pH = 3，1 g样品）下1小时后吸附和光催化降解的去除效率达到99.60%。最大吸附容量达到49.80 mg·g。此外，AgNPs在紫外光下2小时内的降解率达到99.76%，突出了AgNPs在增强吸附和光催化方面的协同效应。本研究不仅强调了海枣种子作为AgNP合成的环保前驱体的潜力，还突出了AgNPs在废水处理中的适用性。
