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Background and Objectives: Cyanide is a toxic pollutant existing in the various
industrial effluents such as iron and steel, coal mining, non-ferrous metals
manufacturing and metal plating. Its presence in water resources and
wastewater, as serious hazardous substances leads to undesirable effects on
both the environment and human. Thus, its concentration control is essential
for human health. The main goal of this study was to evaluate Fenton process
efficiency in cyanide removal from aqueous solution.
Materials and Methods: This
is an experimental study Conducted at Lab scale in a batch system. We
investigated effect of different variables including pH, mole ratio of Fe
2+/
H
2O
2, contact time, and initial concentration of cyanide.
Data were analyzed using Excel software.
Results: We found that
cyanide with initial concentrations of 0.4 mM/L was reduced by 92 %. This
removal result was related to oxidizing agent of hydroxyl radicals under
optimum conditions including pH = 4, molar ratio Fe
2+/ H
2O
2=
0.046 (Fe
2+=0.27 mM/L) after 6o min reaction time. An increase in
reaction time was not improved cyanide removal efficiency. Moreover, the Fenton
process efficiency in cyanide removal decreased from 92 to 60 %, by increasing
the initial cyanide concentration from 0.4 to 0.6 mM/L.
Conclusion: It can be
concluded that Fenton oxidation Process can be considered as a suitable
alternative for cyanide removal to achieve environmental standards.
