| Abstrakt: |
This article presents an environmentally friendly method of exploiting and recycling waste materials by synthesizing nanoparticles (NPs) from natural waste resources. Calcium oxide NPs have been synthesized from chicken eggshells through the sol-gel method. Sol-gel is a simple, cheap, low-temperature and low-pressure method for synthesizing metal oxide nanoparticles, which has many advantages over other mechanisms. The synthesized CaO nanoparticles were characterized by EDX, FTIR, XRD, SEM, HRTEM, BET, and UV-Visible spectroscopy. The as-synthesized CaO nanoparticles exhibit intrinsic peroxidase mimic activity (POD-like). A newly developed method was described for quantitatively determining 2,4-D herbicide residues based on their high POD-like activities and cascading catalytic reactions. The proposed method shows the limit of detection of 0.54 µg/mL, limit of quantification of 1.63 µg/mL, and the recovery was from 98.333 to 99.633%. The presented approach was successfully applied for estimation of 2,4-D in wastewater and soil samples and the results were compared with the results obtained from UV-Visible official method. [ABSTRACT FROM AUTHOR] |
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