| Abstrakt: |
The adsorption of pollutants onto metal and metal oxide nanoparticles of zinc oxide, silver, magnetite, and copper oxide as efficient adsorbents has received tremendous attention in recent years. However, only a few reports are available on the adsorption potentials of NiO nanoparticles (NiONPs). This work reports the adsorption of amoxicillin and nortriptyline pharmaceuticals onto biosynthesized NiONPs prepared from the aqueous leave extract of Platanus occidentalis. The plant leaf-mediated NiONPs were characterized via standard techniques and revealed successful synthesis of the nano-adsorbent. The NiONPs showed a pHpzc of 8.6, a surface area of 128.4 m2/g, pore volume of 0.486 cm3/g, and a pore diameter of 12.84 nm. The adsorption capacity of NiONPs for amoxicillin and nortriptyline was 116.7 mg/g and 72.62 mg/g, respectively. The Freundlich model was well suited to the isotherm modeling of the process compared to Temkin and Langmuir models. Kinetics was well described by the pseudo-second-order and intraparticle diffusion rate equations. The adsorption was found to be exothermic and spontaneous with a decrease in randomness at the pharmaceutical NiONPs interface. The biosynthesized NiONPs showed less than 10% decrease in the percentage adsorption of both pollutants after five cycles of reuse. This research showed that Platanus occidentalis leaf-mediated NiONPs is an efficient material for the adsorption of amoxicillin and nortriptyline. [ABSTRACT FROM AUTHOR] |
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