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Green synthesis of bio-functionalized nano-particles for the application of copper removal - characterization and modeling studies

机译：生物官能化纳米粒子的绿色合成应用铜去除性鉴定及建模研究

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摘要

Green technology for the synthesis of nanoparticles has gained momentum due to its cost-effectiveness and eco-friendly nature. In this research study, silver nanoparticles (AgNps) were synthesized using an eco-friendly biological method involving the use of marine algae, Halimeda gracilis. The surface properties of the synthesized silver nanoparticles were studied using UV-visible spectroscopy, Fourier transform infrared spectroscopy and scanning electron microscopy methods. During the synthesis of nano particles, the parameters namely temperature (30 °C to 90 °C), pH (6-10), silver nitrate (AgNO_3) concentration (1-3 mg/ml) and quantity of algal extract (1-3 ml) were optimized to improve the production of AgNPs. The application of the synthesized silver nanoparticles for the adsorptive removal of copper from aqueous and industrial wastewater was investigated. Intra-particle diffusion mechanism was identified to be controlling step in metal removal. Regeneration of sor-bent was carried out using 2.0 M HC1 and the reusability was verified for 6 cycles. A removal efficiency of copper (64.8%) from electroplating wastewater demonstrated the industrial application potential of the synthesized silver nanoparticles.
机译：由于其成本效益和环保性质，为纳米粒子合成的绿色技术得到了势头。在该研究中，使用涉及使用海藻的生态友好的生物学方法合成银纳米颗粒（AgNP），涉及使用海藻，Halimeda Gracilis。使用UV可见光光谱，傅里叶变换红外光谱和扫描电子显微镜方法研究了合成的银纳米颗粒的表面性质。在合成纳米颗粒期间，参数即温度（30℃至90℃），pH（6-10），硝酸银（AgNO_3）浓度（1-3mg / mL）和藻类提取物的量（1-优化3毫升，以改善AgNP的产生。研究了合成的银纳米颗粒用于从水性和工业废水中吸附铜的吸附除去铜。鉴定颗粒内扩散机制是控制金属去除的步骤。使用2.0M HCl进行SOR弯曲的再生，并验证可重用性6个循环。铜（64.8％）从电镀废水中的去除效率证明了合成的银纳米颗粒的工业应用潜力。

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