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Keywords
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Adsorption,
Abamectin,
Nanorod,
Molybdenum Trioxide,
Adsorption Isotherm.
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Abstract
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Agricultural pesticides are significant environmental pollutants that cause serious
harm to humans and the ecosystem. Among these pesticides is abamectin, which is
used as an acaricide. In this study, needle-like molybdenum trioxide (MoO₃) nanorods
were synthesized via the hydrothermal method, and a molybdenum trioxide@graphene
oxide (MoO₃@GO) nanocomposite was heterogeneously prepared for the removal of
the pesticide abamectin. The synthesized nanoparticles were characterized using Xray
diffraction (XRD), scanning electron microscopy (SEM), and infrared
spectroscopy (IR). The average size of the MoO₃ nanorods was found to be 110 nm.
The adsorption performance of these two materials for abamectin was compared. The
results indicated that both adsorbents exhibit high adsorption capacity, with the MoO₃-
graphene oxide nanocomposite showing superior adsorption. Key variables such as
pesticide concentration, adsorbent dosage, contact time, and pH were investigated. The
results demonstrated that the adsorption capacity of MoO₃ nanorods was 95%, while
that of the synthesized nanocomposite reached 98%. The adsorption process followed
the Langmuir isotherm model. The optimal adsorption conditions were determined as
follows: adsorbent dosage of 3 mg, pesticide concentration of 5 ppm, contact time of
15 minutes, and acidic pH.
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