 |
|
|||
|
|
|
|||
 |
|
Destruction of cyanide by ozone in two
gas-liquid contacting systems The
treatment of aqueous effluents resulting from cyanidation process is one of the main
problems in the gold mining industry. Different methods are used for cyanide destruction
or cyanide regeneration. Ozone is an alternative that presents the advantage of the
removal of cyanide of cyanidation tailings. The reactions of oxidation of cyanide by ozone
were studied in aqueous solutions using a bubble column and a mechanically-stirred
reactor. These reactors were operated at different conditions of ozone dosage rate,
gas-flow rate and cyanide concentrations. The rate of the oxidation of cyanide by ozone
can be described by an equation, which is of first order with respect to ozone and
independent on the cyanide concentration. The reaction of ozone with cyanide occurs by
oxidation of one mole of cyanide by one mole of ozone. This work shows that the rate of
oxidation of cyanide by ozone is independent of the type of reactor. |
|
