Preparation of Silver Nanoparticles from Synthetic and Natural Sources: Remediation Model for PAHs

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Preparation of Silver Nanoparticles from Synthetic and Natural Sources: Remediation Model for PAHs

January 13, 2021 Engineering 0

With a growing appetite for the applicability of metal nanoparticles in different areas such as electronics, catalysis, chemistry, energy and medicine, the advent of nanoscience and technology is gaining prominence. Wet chemical techniques typically synthesise metallic nanoparticles, where the chemicals used are most frequently poisonous and flammable. In this work, an attempt is made to compare the efficacy of two separate methods of synthesis and each method for the remediation of polyaromatic hydrocarbons (PAHs). In this respect, silver nanoparticles are prepared using garlic plant extract using the green and wet chemical process (Allium sativum). During synthesis, the extract is known to reduce the metal and functions as a stabilising ligand. These synthesised silver nanoparticles (Agp) and (AgW) were applied as adsorbents in experiments in synthetic batch mode at various pH and temperature parameters. At fixed dosages of 1 mg/Kg of adsorbent, a concentration of 0.01 mg/L of Phenanthrene, Anthracene and Pyrene was induced. The UV-Visible spectrophotometer was used to evaluate the residual concentration of each PAH. The results showed that both adsorbents adopt the Phenanthrene>Pyrene>Anthracene sequence with optimal removal in each case of more than 85 percent. Agp adsorbent, displaying 3, 3 and 11 orders of magnitude greater efficiency than Agw, achieves a distinctive privilege. More functional groups in the plant extract involved in the binding of PAH to the surface can be attributed to it. FTIR, SEM and EDX were used to characterise each synthesised adsorbent. The average size of the particle was estimated to be between 13-26 nm. The current study provides an easy and convenient method of nano-sized particle synthesis by using low-cost and non-hazardous sodium hydroxide as a reducing agent rather than toxic sodium borohydride. The study concludes that alternative economic and green adsorbents are used to regulate polyaromatic hydrocarbons (PAHs). The study advises the use of alternative green and economical natural adsorbents to regulate polyaromatic hydrocarbons (PAHs).

Author (s) Details

Maryam Abbasi
Department of Environmental Sciences, Fatima Jinnah Women University, The Mall Rawalpindi, 46000, Pakistan.

Fatima Saeed
Department of Environmental Sciences, Fatima Jinnah Women University, The Mall Rawalpindi, 46000, Pakistan.

Prof. Dr. Uzaira Rafique
Department of Environmental Sciences, Fatima Jinnah Women University, The Mall Rawalpindi, 46000, Pakistan.

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