Abstract:
This research is to study about removal of hexacyanocobaltate and tetracyanonickelate by oxidation using ultraviolet with titanium dioxide. To compare and efficiency in the removal of cyanide by changing parameter. To set up pH (9.5 10.5 12.0). The beginning level of cyanide and cyanide-complex (100 500 1,000 micro-molar). The level of titanium dioxide (0.1 0.5 1.0 1.5 2.0 gram per liter) and air flow rate (0.5 1.0 2.0 liter per minute). The result of experiment can be summarized as follow: The study of cyanide oxidation in the situation that is proper for cyanide oxidation, is the level of titanium dioxide 1.0 gram per liter, pH is 9.5. Air flow rate is 0.5 liter per minute with using time for cyanide removal as 100% in 180 minute. Cyanide oxidation can occur well in low level is 100 micro-molars. But cyanide has high level so selecting high pH can be safe from hydrogen-cyanide. Then the implementation should select pH as 12.0. The study of heacyanocobaltate oxidation in situation that is proper for hexacyanocobaltate removal in synthetic watsewater, is the level of titanium dioxide 1.5 gram per liter, pH is 12.0, air flow rate is 0.5 liter per minute with using time for hexacyanocobaltate removal as 31.76% in 180 minute. Hexacyanocobaltate can occur well in low level at 100 micro-molars. The study of tetracyanonickelate oxidation in situation that is proper for tetracyanonickelate removal in synthetic wastewater, is level of titanium dioxide 1.5 gram per liter. pH is 12.0, air flow rate is 0.5 liter per minute with using time for tetracyanonickelate removal as 66.12% in 180 minute. Tetracyanonickelate oxidation can be occur well in low level at 100 micro-molars. The study of mixture oxidation in situation that is proper for mixture removal in synthetic watsewater, is the level of titanium dioxide 1.5 gram per liter, pH is 12.0, air flow rate is 0.5 liter per minute with using time for mixture removal as 42.62% in 180 minute. Mixture oxidation can be occur well in low level at 100 micro-molars.