Environmental Engineering Reference
In-Depth Information
+
Cl
Cl
Cl
Cl
Cl
m/z - 256
Pentachloro
cyclohexane
Cl
Cl
Cl
Cl
+
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
-
, CO
2
+ H
2
O
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
m/z - 290
Lindane
OH
Cl
m/z - 289
Hexachloro
cyclohexane
1-Hydroxy-2,3,4,5,6-
pentachlorocyclobenzene
Hexachloro benzene
OH
Cl
Cl
Cl
Cl
Cl
m/z - 272
1-Hydroxy-2,3,4,5,6-
pentachlorocyclohexane
FIGURE 25.8
Proposed pathway of lindane degradation. (From Senthilnathan, J. and Philip, L.,
Chem. Eng. J.
, 161, 83, 2010.)
(c)
Final chromatogram
3.87
7.91
40th min chromatogram
3.19
4.15
(b)
12.22
14.82
Initial chromatogram
2.8
12.24
(a)
2.9
4.16
3.26
14.85
4.88
3.85
5.35
500
1000
1500
2000
2500
2
4
6
8
10
12
14
16
Time (min)
FIGURE 25.9
GC-MS analysis of commercial-grade methyl parathion under solar radiation (sample was collected at (a) ini-
tial, (b) middle (40th min), and (c) end of the reaction for 250 μg/L of methyl parathion).
