Abstract
Owing to the common phenomenon of cyanide toxicity, this study focused on oxidative catalytic detoxification of aqueous cyanide in the presence of copper-crown chitosan nanofiber. To overcome the difficulty in electrospinning chitosan, chitosan-salicylaldehyde was initially synthesized via Schiff base condensation, electrospun, and post neutralised into chitosan nanofiber. The copper-crown nanofiber was prepared using the impregnation method. The nanofiber material was characterized using FT-IR, SEM, TGA and DSC. The observed pseudo first-order rate constant for the catalytic H2O2 oxidation of aqeous cyanide with copper-crown nanofiber as catalyst was found to be 16 times greater than the oxidation with only copper catalyst. In addition, the reaction was found to be dependent on the size of the copper-crown nanofiber, pH, temperature, and H2O2/CN-. The reusability of the copper-crown nanofiber catalyst makes the process economically and potentially viable for commercial application.
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