Photocatalytic degradation of Lidocaine HCl using CuO/ZnO nanoparticles

Document Type : Research Paper

Authors

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Abstract

In this paper, the photocatalytic degradation of Lidocaine HCl, an anesthetic was investigated in
aqueous solution using CuO/ZnO as a photocatalyst. The degradation was studied under different
conditions including the amount of the photocatalyst, irradiation time, initial concentration of drug,
pH of the system, initial concentration, addition of oxidant on the reaction rate and anion presence.
The results showed that the photocatalytic degradation of Lidocaine HCl was strongly influenced by
these parameters. The best conditions for the photocatalytic degradation of Lidocaine HCl were
obtained. The optimum amount of the photocatalyst used is 0.48 g/L. The photodegradation
efficiency of Lidocaine HCl increases with the increase of the illumination time. It was found that the
photodegradation efficiency decreased with increasing the initial concentration of Lidocaine HCl.
The photodegradation efficiency of Lidocaine HCl was accelerated by adding a small amount of
H2O2. The possible roles of the additives on the reactions and the possible mechanisms of effect were
also discussed.

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