Environmental Engineering Reference
In-Depth Information
12
1
10
2
8
3
6
4
2
0
0
50
100
150
200
250
300
t
(min)
figure 11.4
Photodegradation of aldrin in water without NCMC (Ti) (1) and with NCMC (Ti) under sunlight (2) and UV lamp (3).
12
10
1
8
2
6
4
2
0
0
2
4
6
8
10
t
(h)
figure 11.5
Photodegradation of aldrin powder in water under sunlight (1) and UV lamp (2).
10
9
1
8
7
2
6
5
3
4
3
2
4
1
0
0
50
100
150
200
250
300
t
(min)
figure 11.6
Photodegradation of lindane in water without NCMC (Ti) (1) and with NCMC (Ti) under sunlight (2) and UV lamp (3).
Behavior of trichlorobenzenes formed during the irradiation of lindane.
The photodegradation of PCBs by NCMC (Ti) was studied in laboratory conditions. A colloidal solution of NCMC (Ti) was
added to Petri dishes containing water with transformer oil with concentration of 800 µg/l and PCBs with concentration of
80 µg/l. Petri dishes were placed under the sunlight at 11 a.m. and tested for 6 h. The concentration of NCMC (Ti) in water was
1 mg/l. Dependences of PCB concentrations in the samples irradiated by sunlight and UV lamp against exposure time are given
in figure 11.9. The results show that PCBs are degraded for 5-6 h.
