- MB Initial Absorbance
* MG Initial Absorbance


---.--- MB Final Absorbance
 MG Final Absorbance


 2
 1.8-
 W 1.6
 a-
 'S 1.4 ---
 1.2

 ns = 1

 S 0.8 98% for MB
 S0. and 20% for
 $ E 0.6 -----
 0 0.4 M,
 45% for MG
 < ^B Y and 20% for
 0
 0 2 4 6 8 10
 Concentration (mg/L)

Figure 4-2. Photolysis of MB and MG (2 hours UV exposure at 0.45 mW/cm2) as a
 function of initial dye concentration.


-o- Initial Absorbance
- Final Absorbance (1.1 flux)


---- Final Absorbance (0.45 flux)


0 1 2 3 4 5 6 7 8
 Concentration (mg/L)


9 10 11 12


Figure 4-3. Photolysis of RR (2 hours UV exposure) as a function of initial dye
 concentration and flux.


 0.3

 0.25

o 0.2

S0.15
0
.0 0.1

 0.05

 0