610
S. Kinoshita and T. Sunada
Table 1.
Reduction of PCB in aqueous solution by gamma rays
Gamma dose
Reduction rate
(%)
(M rad)
initial concentration (ppb)
100
50
0.01
0
0
0.1
28
54
1.0
70
86
10
92
95
Table 2.
Dependence of extraction of PCB with n-hexane on pH
pH
Concentration determined
(Ppb)
3
107
6
100
10
104
Table 3.
Dependence of reduction of PCB by irradiation on pH*
Reduction rate
(%)
PH
6
8
0
0
28
9
70
60
92
86.5
Gamma dose
(M rad)
0.01
0.1
1.0
10
3
0
16
63
79
*initial PCB concentration, 100 ppb