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Abstract

The role of nanotechnology in remediating organic pollutants is substantial, considering the significant environmental consequences arising from the extensive agricultural use of pesticides. Consequently, nano adsorbents have attracted particular attention due to their exceptional properties and capacity to effectively degrade and eliminate various organic pollutants, including pesticides. Here, an attempt was made to fabricate and characterize silver nanoparticles (Ag NPs) using orange peel extract as a reducing agent. Transmission Electron Microscopy (TEM) images confirm the quasi-spherical shape of the Ag NPs, with average sizes of 40 nm, 30 nm, and 20 nm corresponding to different silver nitrate concentrations (0.5, 1, and 2 moles). UV-VIS Spectroscopy analysis revealed absorption peaks at 427 nm, 429 nm, and 437 nm for sizes of 20 nm, 30 nm, and 40 nm, respectively, highlighting the correlation between size and optical characteristics reveals that there is a noticeable redshift in absorption peaks as size increases. Zeta potential analysis indicated moderate stability for the fabricated nanoparticles, with values of -26.6 mV, -25 mV, and -24 mV for nanoparticles of sizes 20 nm, 30 nm, and 40 nm, respectively. X-ray diffraction (XRD) analysis confirmed the presence of a polycrystalline structure with a cubic crystal phase of fabricated Ag NPs with crystallite sizes of approximately 11.0839 nm, 11.0694 nm, and 10.2993 nm for 20 nm, 30 nm, and 40 nm nanoparticles, respectively. Fourier-transform infrared (FTIR) analysis exhibited functional groups from the orange peel extract on the nanoparticles' surfaces, enhancing their stability and bioactivity. Additionally, the interaction between Ag NPs and three different pesticides (Cypermethrin, Lambda-cyhalothrin, and Methomyl) was studied, indicating the potential for Ag NPs to degrade halocarbon pesticides through electron transfer processes. The study provides valuable insights into the green synthesis of Ag NPs and their potential applications in various fields, including environmental remediation and agriculture.

Keywords

Ag NPs, Bioreduction, Green synthesis, Halocarbon pesticides, Orange peel extract, Organic pollutants

Subject Area

Physics

First Page

177

Last Page

189

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Receive Date

9-10-2023

Revise Date

12-18-2023

Accept Date

12-20-2023

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